We invited the children from Kinderhuis Johanna, Waterland and artist Dave Simson to paint the children’s dreams for the future on the jib. It was great! See all the work, and the sailing, in the next movie.
17 children, assisted by artist Dave Simson, painted their dreams of the future on Ya’s jib
Next day we went sailing. So, the children hoisted the sail and, of course, they enjoyed seeing their paintings. Their footprints make heart prints on the sail, accompanied by all creatures of the sea. You see, this is the clean, healthy and happy future the children want to live in. Don’t you?
We featured on the Children’s News in Suriname (5 minutes of colourful joy)...
One reason for us to become fossil free, is because it saves money. Another reason has always been that you stop supporting ethically doubtful states like Saudi Arabia, Russia, Libya, and more. It is geopolitics on micro level.
How we did this on ‘Ya’ was mainly to look into the mirror of our own consumption. Yes, that hurts, but we had to. Because, with our normal consumption level we had to build some 5 windmills and about 5 times more solar panels on the ‘Ya’. That is simply too much work, and we should build a bigger boat just to get all that equipment on it. Which would raise our consumption again…. We can’t afford such detours.
Detours are great when you have time and money, when you like complexity and challenges, with discussions.
So, we used our common sense and discovered that we were on a detour. We took a shortcut and checked our own consumption and what we spilled.
That was a short cut! It proved to reduce our energy consumption with about 70-80%. The main trick is that we only use what we need. That is rather simple. An example:
We cook on an induction cooker, instead of combusting gas on a gas stove. This saves about 55% of energy. We use a pressure cooker, saving another 15%. The moment it cooks, we take it from the induction into an insulation box till it is cooked, and we saved another 15-20%. So, on cooking we reduce our energy use by 80-90%. And we cook and live in more comfort (less stress, no moist atmosphere).
Another example is a flexible mind in the planning of our trips. That reduces the engine use with about 80%. (About flexible planning on your side: how much fossil fuel did you save in the COVID time, when you stepped in your car 1 time a week instead of 5 times?)
So, it is common sense: the short cut is to first check your consumption before you start supplying your consumption (or ‘demand’, as the Dutch government calls it.).
Zero use of fossil fuels makes our childrens future better, and we save money, and we micro-contribute to better geopolitics.
Geopolitics and fossil fuels
Now the Ukraine war broke out. Even here in Surinam everyone notices this, for example on the petrol and gas prices. Surinam has its own petrol and gas production, so in theory they don’t depend on petrol from abroad. Although nearly autarkic, the prices on the pump have risen seriously. Simply because also Suriname is part of the world economy. The relation with the USA is close. The USA stopped taking gas and oil from Russia and uses their own oil fields instead. This is just a tiny change, but enough to raise the price sharply because everywhere else in the world the oil prices rise sharply.
The EU is directly dependent of Russian gas and oil. The EU leaders themselves must feel the irony that on one hand they take measures to boycott Russia, while on the other hand Russia could squeeze the gas supply a bit and states like Bulgaria and the Baltics (near100% dependent), Germany (50%), Poland (40%) and many more countries, will be in serious trouble.
Geopolitics is a serious thing.
The EU dependency on Russion fuel is large. Here the gas dependency in 2020 is shown in percentage part consumption of Russian gas (source )
Dutch detours
Let us focus on the Netherlands. This country has a small dependency on Russian gas (14% in 2021), so that is easy to reduce. Immediately after the EU’s first boycott measures, the Dutch government decided to develop an extra wind park at sea costing 1.2 billion Euros. Does it help? Mwah, In about 3 years. But not now. And contributes only a few percents to our energy use. And it costs a lot.
Although Holland is a small and crowded country, they also speeded up procedures for solar energy fields. Will that work against Putin’s power? Mwah. In about 2 or 3 years. on its fastest. What will all these parks cost? Billions on direct costs, but the real costs will be the many billions caused by the rise of the square meter price of the scarce Dutch soil.
Blue energy, and all kinds of other brand-new alternative energy sources are too undeveloped. Also, the research and development of near-sustainable nuclear power like thorium-based power plants, has been neglected for decades. This will take another 10 years.
So, all sustainable energy supply can’t help us against Putin’s threat. So then what?
Using coal power plants is a terrible solution, especially for the Netherlands with its vulnerable low sea level. And with a prime minister speeching in Glasgow for the international forum: “Now we need action! Action! Action! On the climate change actions, Holland is mediocre, but the Dutchmen should be the front runner, the example, the leader. Restarting coal power plants, would make itself doubtful.
Sofar in an outline: we are spending all money we have, and more, we work our ass off, would throw away our image, and still mister Putin has his hand on the gas valve, able to close it anytime.
We Dutchmen are cornered. With our back against the wall.
So, what now?
If all detours fail, then take the shortcut
Now the Dutch Association for Sustainable Energy has made a recommendation for the Dutch government. The question is how to save the 5 to 8 bcm (billion cubic metres) of Russian gas? The answer starts with the common sense measures to prevent and reduce the energy:
“The Netherlands can save almost 5 billion cubic metres of gas in one year. In four years, potentially 10 billion cubic metres of gas can be saved.”
A miracle? No. Did they get mad in these respected institute? No.
They continue: “Positive side-effect is a CO2 emission reduction of roughly 10 percentage points of our Climate Goals (55% in the National Climate Act)”
But that is great! It has always been a skin of their teeth thing to their targets on the climate change actions. Let us have a look on what actions have to be taken.
For the Netherlands: more than half of the possible reductions in gas could be done by simple measures. More than 80% of them could be done within a year. This reduces our immediate dependency on Russia. Without negative side effects. Source
So finally, after all expensive detours failed, even the government has to see that the simple solutions work. These solutions don’t cost much, that they are mostly common sense, many people can understand them, they are never high tech (sorry to all engineers and tech universities), they are even pretty boring, and are all easy to implement. And they are not sexy. So plenty reasons for the government why they are never focused on these short cuts.
But, they help.
Check on fossil free ‘Ya’ if you doubt about it.
Want to join us on ‘Ya’ for a time? Then email to info@fossilfreearoundtheworld.org Or give us an app or call: +316 283 44 823 (Signal or Whatsapp)
We entered Suriname and saw sharp divisions in the water, probably differences in the currents of river water and oceanwater. And we found many more controversies in Suriname.
The sea before Suriname consist of the fresh water from the river (right) and the salt sea water.
Since 2014, Suriname is one of the three countries in the world with a net-negative carbon economy. They absorb more greenhouse gases than they emit from human activities.This negative carbon output is easy to explain. Only half a million people live in Suriname. 90% of Suriname’s human activity is on the coastal strip of 30 kilometer. The other hundreds of kilometres are jungle, rainforest, which capture carbon.
The capital of Suriname, Paramaribo, looks like a Dutch town. Not only in the architecture of some of the characteristic buildings, but also in its setting: it is built almost on sea water level
Carbon negative, but necessary carbon productivity
Like we saw in Gambia, also Suriname is particularly vulnerable to sea level rise and salt water intrusion.[11] , because nearly all people live in the low lying coastal strip.
Agriculture and mining are the main sources of income. Agriculture contributes the largest part of the country’s emissions.[2], the mining is the next. The country is covered by forests, mainly pristine rainforest, which absorb the CO2. This annually absorbs 8.8 million tons of carbon, while providing annual emissions of 7 million tons of carbon
While Suriname is rightfully proud of its carbon negative status, it badly needs the income from mining: formerly bauxite, now oil and gold. Petroleum exports are an important part of the economy of Suriname,[7] much of which is controlled by the state owned Staatsolie Maatschappij Suriname. As of January 2020, an American corporation, Apache Corporation, was drilling wells in Maka Central.[8]Unfortunately, mining can do great harm to the rainforest.
The Afobaka dam with the hydro energy, producing most of Surinams electricity (source)
Unfortunately, the building of the dam came with negative side-effects. The original inhabitants, the Samarakans (Marrons) were forced to move, the wood in their forest was cut and they suffered a great deal from all of this.
Suriname has an important source of reneweable energy: hydroelectric energy. In the 1960s, the Aluminum Company of America (Alcoa) built the US$150-million Afobaka Dam[16] . This created the Brokopondo Reservoir a 1,560 km2 lake, one of the largest artificial lakes in the world. Some 75% of the hydroelectric energy in the country was used for alumina and aluminium.(source). After the shutdown of Alcoa, Suriname became the owner of the Dam and hydroenergy now supplies the major part of the countries’ electricity (source)
Electricity cables dominate the main roads in Paramaribo. In fact, they are everywhere.
Rich country, poor people
They say here: “You put your walking stick in the soil and next year there are branches and leaves on it”. That is the fertility. But the country is also rich in minerals. In 1990, the UN ranked Surinam as potentially the 17th richest countries of the world. On the other hand, the UN in 2018 predicted that in 2030 Surinam would be one of the poorest countries of the world pro capita.(source) This would probably be caused by the budget deficit, caused mainly by debts and the great number of governmental employees (source).
Now, Suriname is a low-income country indeed. Most people earn 260 to 400 Euro per month and prices of living are relatively high. In 2018 20% of the people lived under the poverty limit. With COVID, GDP dropped 15%. Like most of the Caribbean states. As a matter of fact, it goes for most of the developing countries who are at risk of flooding with climate change.
No contribution to climate change, but victim of the consequenses
Surinams contributions to global climate change have been limited. But now, climate change leads to warmer temperatures and more extreme weather events. Noel, the owner of the Marina, tells us that schools in the south of the country have been closed in recent months due to flooding.
According to the World Bank, temperatures have already increased across the country, with a significant increase in hot weather.[9] A large part of the rainforest may disappear because of the changes in rain and temperature.[10]
Koppen-Geiger climate map for 1980-2016 ((left)and for 2071-2100right). There will be less tropical rainforest, more monsoon climate and even some savannah in the south.
The future: long term or short term?
Suriname is in a constant balancing act in relation to sustainability. And it is aware of this.
Positive signpost with the ruins of the past in the background, Paramaribo, march 2022.
In 2020 Suriname updated the Nationally Determined Contributions focus on four key areas; forests, electricity, agriculture and transport. Suriname wants to hold on to 93 per cent forest cover but needs “significant international support… for the conservation of this valuable resource in perpetuity.”
Sustainable and “clean” electricity is also a priority; Suriname strives for a “share of electricity from renewable sources above 35% by 2030.”
Agriculture is the cause of 40 per cent of the country’s total emissions but this has also provided a continuous valuable source of income. At the same time, the sector is strongly impacted by climate change. So, Suriname focusses on the development of climate-smart farming. That includes water resources management, the promotion of sustainable land management; and adopting innovative technologies, for example converting biomass into energy.
For transport, Suriname wants to improve public transportation and introduce controls on vehicle emissions.
Lotus flowers in a little canal in Suriname. Did you know these beautiful flowers only grow in the mud?
It is going to be quite a road to combine economic and sustainability goals. Suriname is well worth the effort.
But in the meanwhile, what can Surinam do for such long-term ambitions? Still the state has a ‘waterhead’ on government, which in combination with prestige projects like the Wijdenbosch Bridge, led to a state debt. The pay back forms the largest costs each year. And still, the salaries have to be paid every term of the month, being the second largest costs.
Surinam needs foreign money, but their banks mostly block the ways to get it in.
A concrete example. Peter rented a car and payed with some left-over Euros. The rental man was very happy with it.
At the gas station Peter topped up the petrol tank. The gas station does not accept a credit card, only cash Surinam Dollars. So, Peter goes to the ATM for cash. Every ATM has a waiting line (otherwise they don’t work). Peter tried to get money from the ATM, but at the very end of the procedure, it says “No”. Peter tries his other card. This one does not work either, also at the very end. Only result is that the line gets longer. Peter tried other ATMs. No way.
Peter went to the bank. The line was 45 minutes. The answer was:
“Please try it later.” Peter tried it later with 5 other ATMs. Again, Peter went to bank, and was helped after 35 minutes. The answer was also here:
“Please try it later.” Peter said he already did. They answered:
“Please try it tomorrow.”
So, from 11 AM till 4 PM Peter has tried to get Surinam dollars, but zero success. He would have much preferred to spend this time to buy things, eat Surinam meals etc. That day Peter heard all the professional answers for: “we are too incompetent to get money from foreign bank accounts”. These unwilling ATMs are not an incident; it is structural.
It is French and Caribbean. The colours are truly impressive. Fruits and vegetables as far as you can see, sold by vendors from French Guyana and Surinam. There is every reason to buy local from a sustainability point of view. But the truth is: it is just too good not to do so!
Best ask what the fruits and vegetables are and how to prepare them. For example the green/orange fruit of a palmtree, the Parepou has to be boilt for 35 minutes and it tasts like a sweet potato! Parepou recipe The lady warned me that the chilies are really hot.The colorful arrangements catch the eye…The pepper and chilies look like candy. Best not to believe that.Cucumbers that look like courgettes, courgette-like vegetables that look like cucumbers, everything is possible.The ‘harvest’ of our first shopping tour, note especially the small bananas and local ‘chestnuts’ that have to be boiled for 20 minutes.The second shopping tour brought for example the red ‘pommes d’amour (recipe), fragrant Cupuaco (recipe), and the sour gooseberries (recipe).
Take it away!
If you don’t feel like cooking, on the Saturday market you can buy French-Guyanese delicacies.
The immensely popular fried codfish…the French-inspired ‘tarte-a-‘l’onion’….and the tasty ‘jamais goûté’ that is only caught on Maroni river.
But how about the weather?
Even on a rainy day (and there are lots, it is the rainy season) everybody takes out the umbrella and goes there. It is fun.
Enjoy your local markets!
Buying local saves an awful lot on fossil fuels (prevention on cooled transport and storage), and we can store it longer. And, it is more fun!
You want to join us on our sailing fossil free sailing and living? Then contact us.
During our trip, we saw lots of weed in the ocean. We did some research and quickly found the answer: it is Sargassum weed and it has been b(l)ooming since 2011. Columbus already wrote about the Sargasso Sea, as a strange local phenomenon. However, the massive growth we see now, could have rather scary consequences.
What did we see?
A pluck of weed just behind the ‘Ya’.
We saw the weed all the time. Watch with us some secondsThe wind and waves shape the weed in endless long lanes through the ocean
We took some weed to see what it looked like from nearby, and then used the microscope we use for the GOES project.
The weed on a plate…… and parts of the weed on a petri-dish
On some of the weed, you can see small black dots, mainly in the ‘hair’ of the weed. These could be plants or plastics.
Our first conclusion was that there might be plants as well as plastics in the ‘hairs’ of the weed. But this is up to biologists.
Is this weed really that much? The growth of the weed has been documented and studied over the last 10 years.
The most likely cause is climate change. The Sahara dries and grows, and the dust clouds spreading at sea are rich in nutrients. Climate change also leads to the upwelling of nutrients from deep ocean waters at the other end of the sargassum belt in West Africa. Also, fertilizer flows into the Amazon River and the Mississippi River and then to the ocean. The fertilizer comes from industrial-scale agriculture (corn, soja) and (meat) ranches.
Sargassum field near Big Pine Key in Florida, source
Is it good or bad?
The Sargasso sea, that gave the weed its name, is a nursery for marine life. The weed shelters plankton, eel, fish and turtles. But the huge growth in the last decade keeps the sunlight away from marine life and that is a real threat. This is because it can result inlow oxygen levels and create hydrogen sulphide, potentially causing the death of marine life (Pfaff 2015).
The picture shows and describes the effect of Sargassum mats on mammals, fish and plants. SourceSargassum weed on Playa del Carmen, Mexico. Source
Also, some of the weed ends up on the beaches of the Caribbean isles and Mexico. Ecologically this is a tiny bit, but the impact for us humans is big.
Check out this news item: When the weed rots away, it emits a toxic gas, smelling of rotten eggs,
To a solution
The scale is so big, that Mexico deployed the Mexican navy to clean it up from the beautiful white beaches. But, the commanding officer admits that it is hopeless work. Some communities plow the seaweed under the sand. But you can do it once or twice and then the white beach becomes more and more brownish soil.
An engineering company made a ‘Sargassum Seaweed Barrier’ before the beach. It works in normal weather circumstances. But they don’t know what to do with the Sargassum that is caught.
On small scale, people collect it, wash off the salt with (scarce) fresh water and convert it to natural fertilizer. In Mexico some entrepreneurs compress this into bricks and use it, like adobe, for building construction. Problem is that the scale is way to big. Even on a large scale, it would not solve even 0,000001 % of the problem.
In the Netherlands, Wageningen University found a way to convert it into biogas and into fertilizer. But it is not commercially interesting, it creates new side effects. Most of all, although this university proves international excellence on ecology and (marine) biology sciences, it neglects the problem itself, and its cause. Instead of the ocean scale, it narrows the sustainability vision down to a the scale of a coast, or a beach.
In this movie the MIT/PERG researchers put up the idea called ‘SOS Carbon’. Idea is to pump all weed deep into the ocean, where it will die of overpressure and sink to the bottom. But being aware of the gigantic scale of this project, they doubt about the feasibility. Also, they did not check any side effect. So, they narrowed it down to a project to harvest only the weed that could reach the beach and then pump that down to the deep sea on the spot.
Solution from 5 miles to 5000 miles.
All solutions have in common that they don’t look further than the horizon of the coast. Let us say: 5 miles. But the problem is a wide belt about five thousand miles, on a complete ocean as a matter of fact. These solutions are symptom-fighting. In no solution the ecological impact is addressed, neither of the solution, nor of the other 4995 miles. Nobody seems to know if this massive growth will continue, or if it is just a temporary reaction in the eco system. Even the UN Environmental Programme’s white paper focuses only on the solutions for the surplus of weed, because they are not sure if there is anything that can be done about the cause.
The only solution that addresses the scale is the prevention of the entire problem. Prevention is nearly always the cheapest solution and has the guarantee of zero new side effects. This means that we have to address climate change and nitrogen emissions from human activities in the first place. Yes, this is a look in the mirror, and yes, that can hurt. But the solution, living fossil free, will deliver a better life for you, for the next generations and for the rest of the world. That is sustainable. Impossible? We live fossil free on “Ya”. Join us. We all can save a bit of the world for our children.
You remember our movie Children deep down in Gambia about the life of the children in the little fishers village, and the school with all its needs? At the end we asked for a donation. Now, this is one of the pictures we got from the principal of the school:
The principal of the school in Jarreng Tenda has sent us some pictures, like this one.
You know what the principal wrote?
Mr. Adama wrote us: “Dear Peter and Inge, with the money you have sent (…) we could repair the three blackboards of the Jarreng school and we express a big thank to you and the donors.”
As promised earlier: every penny of your donation went straight to the school, so no ‘sticking’ costs. We were lucky that we could avoid bank transfer costs, which are 5 to 10 times higher for third world countries. We got help from Hetty of the Jappaleh foundation, who could give the cash straight away. They do good work for many schools in Gambia.
Hetty of the Jappaleh foundation just gave your donations already converted into Dalasi, to the principal Mr. Adama of the Jarreng Tenda school. On the background teacher Ms Awa Bah, who showed us the school and discussed all challenges they face.
Again: a big thank you!
You want to sail the sea and the ocean fossil free on ‘Ya’? Mail to info@fossilfreearoundtheworld.org or app us on +316 283 44 823 (Signal, Whatsapp)
The ‘Ya’ is participating in the survey project to take samples to survey the oceans and seas on micro plastics. In an earlier article we wrote about the worrying state of the ocean. The chemicals and plastics polluting the oceans and plankton, the number one CO2 ‘converter’ to Carbon, is diminishing on a mass scale. The data about this problem are poor. Now, the GOES foundation (Global Ocean and Environmental Survey) has organized a Citizens (Sailors) Science Project. They armed ‘Ya’ with a sample tube, a microscope, an app on the computer, and a manual how to do it all. Watch the movie here how we take samples to check the microplastics in the ocean.
‘Ya’ is part of the ‘Citizens (Sailors) Science Project of the GOES Foundation, sampling for data to answer the cry from the ocean.
Are you a sailor and interested in participating? mail GOES foundation and ask what you can do.
In Sao Vincente we went swimming with turtles.. Turtle House keeps the beach of San Pedro and the sea clean and feeds the turtles; they instruct the tourists so they use the right sunscreen and don’t touch the animals. This way they raise awareness, protect the turtle population and make a living. Triple gain! This is the tourism we like.
From start to finish: experience swimming with big turtles!
Here at Sao Pedro, we saw the loggerhead turtle (Caretta caretta). “They nest at night in summer,” our host Jair Roche from Turtle House said. “The females find a suitable site on the beach to lay her eggs. Some two-and-a-half months later, the young turtles climb out of the nest and go to sea. Of each thousand, only one or two survive until maturity. The females return 12 to 15 years later to the same beach to nest again.”
Last decades the number dropped dramatically. This is why all over the world, people take the initiative to increase the population again. Raising awareness helps. For example, little turtles instinctively go to the light area, which is the sea. But since the hotels along the beach give lots of light at night, they ran to the shore with all its roads and animals, instead of to the safer sea. Now the hotels dim their light towards the sea when it is night, the turtles can find their way again. Turtle nurseries are trying to guide the turtles to safer places. And, of course, eating turtles is ‘not-done’ anymore.
Several of our sailing friends are really enthusiastic about solar cooking. It’s the most direct way of using solar energy, so naturally, we wanted to try this oven ourselves. Karin from sv “Marelief” made it possible!
Equal portions of flour, sugar and butter; 1 egg, some baking powder and salt. Stir well.
Zen and the art of solar cake-bakingSetting up the solar oven and the core-thermometerWaiting for 10 or 20 minutes
When it beeps it’s ready
On the pontoon, our solar cake attracted international attentionPeter and Eric loved the cake!
The former article showed that the installation of an LFP battery bank is different from the lead acid. Here we describe how we dealt with these differences on the Ya. Take your advantage of it.
Prevent exchange costs
Firstly, you’d better not do what we did on ‘Ya’. We first chose for a lead acid bank and now we exchanged it for LFP. You’d better choose for LFP straight away. We now had to throw away the old lead acid devices, e.g., our main hand battery switch of over 100 Euros, a volt meter, and much more. And, a lead acid bank costs more space and has more weight. In the first place, it has cost a lot of money to realize this. And now with the LFP bank, we have two water and air tight compartments left over. It is all pity money spent.
On the left you see the former Starboard set of lead acid batteries, taking two compartments (On the portside the same set.) In the middle picture the compartments emptied. On the right the LFP bank, and we did not need the front compartment anymore.
Check the compatibility of BMS, CAN bus and charger
One of the beauties of the BMS that it manages the whole charging process. It controls all these little circuit boards in such a way, that a ‘difficult’ cell gets more, an ‘easy’ cell gets less energy. Hence, they all get charged equally, until every cell is at its maximum at exactly 3.65Volt. This last phase is called the balancing phase. Then the charging energy is very little, but very precise. Therefore, the BMS must be able to regulate your charger precisely. It asks for a good communication.
Then you need a CAN bus between the BMS and the charger. You buy the thing from your charger supplier. In case of ‘Ya’ we have a Studer xTender (inverter and charger). Studer delivers the xCom-CAN with a variety of protocols and communication speeds, so no problem for us. But, make sure that there is one that your BMS can communicate with. Make sure, before you buy the BMS (or the charger).
The professional installer like in our case EV Europe, can configure it all.
In the battery compartment there was plenty space to also build in the BMS (right, behind the white panel), the CAN bus (in the middle, also see inset to the very right) and the DC/DC converter (to the left)
Full-automatic system requires solid, reliable work
Full automation sounds beautiful, but a BMS with incorrect feeds, can fully automatically damage your equipment. We made the next mistake.
On ‘Ya’ the BMS got its feed from our 12 Volt service battery, an AGM battery already of age. It also feeds the anchor winch. The voltage drops were big, so the BMS switched the main relay switch on and off and on and off, about 5 times per seconds. This created a chaotic flow of currents running up and down the various charge devices. In one anchor maneuver, these freak currents blew the fuses of the solar MPPT and converter, and the wind generator’s MPPT died.
We did two things to solve this:
We eliminated the cause by giving the BMS a separate 12V power supply. Many choose for a battery, but we installed the higly reliable Studer DC/DC converter. The feed comes straight from the 48 Volt battery bank, through this DC/DC converter feeding the BMS and all its equipment, such as the relay switch.
2. We contained the possible impact, by: – Installing a relay switch on the output of each of the three charging devices (solar, solar and wind). – Connecting a relay on the input of the wind MPPT. This works as a short circuit, to slow down the wind turbine. – Installation of an extra resistor on the output side of the wind turbine, just in case the turbine runs another 2 or three rotations and generating a last bit of power. This would flow into that resistor.
So, now when the BMS switches off the main relay, it also switches off the charging devices and no freak current can enter any device or electronics.
This is also nice if someone is working on the electricity: there is really no power on the net, so no risk of fire or damage when working.
The feed to the Contactor (main switch relay) is also feeding the relay switches that disconnect the outputs of the two solar controllers, and the SilentWind controller. The latter also has a switch to stop the generator, and a resistor to take the possible last current. When the Contactor switches off, every charger output is switched off.
Dry compartments
Main cause of failures of electrics and electronics is the bad, corroded contact, mostly caused by moist and dirt. On a sea going yacht, you have a lot of moist and salt. Connections can easily rot away in that environment. So we climatized this environment of the battery bank and devices.
The lead acid battery bank was put in air tight compartments in the bilge. Now we put LiFePO4cells in it. And, these cells are so small, they don’t take much space. So there was plenty space to make a circular ventilation duct through the compartments, with a dehumidifier. Now, once a day the little 5-Watt ventilator and the 40-Watt dehumidifier run for an hour. It keeps both battery compartments, including the BMS, CAN bus, 48/12 DC-DC converter, circuit boards and all connections, extremely dry.
This is the SB compartment. Inge’s finger shows the ventilation duct. In there, under her finger, is a ventilator. It moves the air through the duct under the batteries, the air is pushed up at the end and then comes back over the top, where the air passes a dehumidifier and goes into a channel to the Port compartment making the same route. The dominant round white thing is the dehumidifier. A little line drains the water to the bilge pump. Now, the compartments are always very dry.
Bypassing contactor manually for charging purposes
It is rare, but suppose you get this scenario.
You are at sea and for whatever reason the battery bank is low. And then, there is no sun and no wind, for days and days. Meanwhile you cook, use navigation equipment, so the bank gets lower and lower. Then, one night, the voltage becomes too low and so the BMS disconnects the Contactor (main switch battery bank).
Then in the morning, the sun starts shining. Since the switch is off, the solar power feed is disconnected from the battery bank, so it won’t charge. Now you are in a Catch 22.
Therefore, we have a little button that switches on the contactor and other relay switches, so the energy can flow into the bank. You have to push actively. When you let it go, the circuit is broken again. But that pushing won’t take long because we are in a steep curve, where a little bit of energy is already enough to quickly raise the voltage. And if something else is wrong, the push button makes you very aware of that and you have full attention to the system.
Here behind the front panel, we made the contactor, together with the fuse visible. If the BMS switched the contactor off, there is this so-called ‘Momentary Push Buttton Switch’ to switch the contactor (and other relay switches) back on. So even when the voltage is too low, we can charge, but with continuous care and attention.
Some extra beeps
The Battery Management System is measuring so much, and is so well in full control, that it invited us to take profit of this advantage. Naturally you get readings on your display when something is going wrong, and even with pre-warnings. But we liked to have some hard signals you can hear. So, there is a high beep now, when the battery bank’s voltage gets too high. There is a low beep when the voltage drops too low and the battery bank is almost empty. And we have another low beep as a pre warning if the battery bank has only 10% left to use. Very nice that you are pre warned before you are confronted with dead engines when you are maneuvering in a harbor.
It just takes some extra hours for installing and mounting the cables, for the rest it is just a matter of some computer settings in the configuration.
This is the EMUS BMS. on the circuit board. EV Europe made this circuit board to have all the outlets and the pins around it, so there are many possibilities for extra options.
The usual extra attention to the alternator
A wind turbine contains an alternator and this is one that you can stop. But if you have a diesel engine with an alternator to charge your batteries, you have the usual problem (next to all problems there are with combustion engines).
The general problem of alternators: you cannot disconnect the output from the battery bank, because the diodes of the alternator would blow up. So, you have to stop the alternator before. When you have a combustion (diesel) engine, you first have to stop the engine before you turn the main battery switch to OFF.
When you take an LFP bank with a BMS, and so an automatic relay switch, the contactor (main switch) is automatic. Whenever there is a chance of fire, or ruining the batteries, because of under or over voltage, it will disconnect automatically.
There are some solutions.
The alternator feed bypasses the main switch. Many boats have this already. The problem is, when you work on the battery bank with the main switch on OFF, and the engine starts running, there is still electricity on the net. And the other way around: when a normal user (like a leisure skipper) switches off the main switch for whatever reason (chance on fire?), he presumes to be safe and have an power free circuit. But, when using the engine, there is electricity again. So again a risk on fire?
Modify the alternator, so the field current is stopped, and the alternator stops charging.
The generations after you will tell you that the best solution is to stop combusting CO2, NOx, SOx and fine dust into the air, and take electric engines for your leisure. They are also much more reliable too. See this article
This is the last of the 4 articles about LFP/LiFePO4 battery bank compared to lead acid. Here you find a more technical description of an installation of a service pack.
