project: my house to island mode


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100kwh-hunter

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Mar 2, 2019
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Goal: no more gas or electric or water bills.
Insulation: Done...result heating with candle
Gas: almost done: 85% .....extra water bucket needed
Electra: started 33kwh : All the equipment is in, extension batts: in progress
water/sewage: in progress/started


Lets get started....this is one out of the three needed
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One for the main house: done
One for two ev's: saving money
One for the machinery in the shed....saving money

More lifepo4 cells are on their way....

I will keep you posted on the progresses
 
Small update:
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On the left the new ac side, on the richt the dc side, i must buy some more "fuse boxes".
One for the cells, two for: main switch grid with kwh meter and one for the "generator" side with kwh meter.
The one for the cells will protecting right now 50kwh of storage.
But will be enlarged with 100kwh extra for 2 ev's

In the hallway i can store 50kwh, under the floor much more, i will keep you updated, the hallway is still under construction.
The radiator will disapear and it will be floor heating with the way of David pos.
Where the tubes of the radiator are will be 25/50mm2 wire to the cells under the floor as the connecting bussbar.

The pv panels need some more fuses and a other fusebox. i think a dc fuse on the + and the - side are needed?
Got 3 of: balancers 5A, bms's 100a and 3x 100v by 20a(but this is not the end.....

Big and great thanks to this forum that made this possible...

With best regards Igor

Comments are still welcome
 

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small update:\
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One row extra on top of that one....13kwh for every floor(280ah x 48v)
In the corer (out of sight) will also be 3 of those floors.
Total: 13kwh x 6....but minus 10% = 62 kwh? incl losses.

Under the floor much more.(in the future!)
For now lets get 50kwh running.
Question....
some folks on the internet want to have a strap on those cells, some dont believe in the strap on?!?!?!?!?
I have the cells 50% SoC so the beld is also...not thight, not lose.
What do you think?
Strap on or no strap on?



Oh yes...4 newton was the max force to bold those nuts on:
you will have a laugh......
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the wrench is 13cm./5 inch long....the hook of the meter is on 10cm/4inch away from the nut...
4 newton is 4 newton?????? right ????
If this is right then i saved on a 100$ tool...no gloves but i toke of my wedding ring..
Fun fact:
My wife has a cold and she was blowing her nose at a moment i was tightening those nuts...my hart stopt beating for a second....

Comments and suggestions are as always welcome.

With best regards Igor K
 
I think i swapt two of the sections of this forum....i thinkk this one must be in

DIY Battery Project Builds

anyway small update:
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40kwh storage.......80kwh is waiting to be connected


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need to tie them up and much more

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Oke small update...​

I had a working system....that is IT
I did some calculations...i am very glad i did not put the system in full servies yet...
The calculations where for the buss bares and the wiring.

The inverter can take 10.000 watts at 50v, meaning 200A...good morning...(i need two total not three as stated earlier!)
The bms es can deliver 100A max each....times?(now 3...in two months from now 6 total)
So i adapted the right rules and the right cable charts..

The most important busbar (from pack to inverter) can carry 400A!!!! (future ready for more than i want or we need)) and every pack of cells will get 25mm2 for 100A!
The bms will cut off when it is over 100A

My first main busbares where out of aluminium...
4x....2mm*10mm
Makes 80mm2 in total...aka not even 40A(mm2 x 0.7A for alu, 1,2A per mm2 for copper)
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Bus bar and connections from the cells to the bus bare......hmmmmmm...glad i re think my system

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Now that copper thingy is a bit better for a bus bar...rated 360A at 60V....300mm2 of pure copper....
My inverter can take 200A max....
But the cells can deliver max 100A per pack..
3 packs installed.......6 more to connect

What do you think....from 40A(3 strips) from battery to busbare and from busbar to inverter(max was 60A 4 strips)

Lets get serious,

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Wire 25mm2 from cells to busbare and 2x 35mm2 from busbar to inverter....
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In this picture i only did one nut good, the other one is all ready done, but not at the time of the picture..
I had my phone light over it.....no single light was coming thru...but solder to be sure?
Yes all the contact point are flat and shiny....


Tomorrow i will post more detail and calculations and numbers on my project and in general the A a cable or a buss bare can handle....
I wish you all the best!!! with best regards Igor K

Ps thanks again for all the help to make this possible! If you see anything wrong.....tell me....you see anything that can be better...TELL ME, thanks in advance
 

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Oh yes...4 newton was the max force to bold those nuts on:

the wrench is 13cm./5 inch long....the hook of the meter is on 10cm/4inch away from the nut...

4 newton is 4 newton?????? right ????

In short, yes, -- but also "no" as it pertains to your application. What is the actual torque / tightening spec for the bolts into the battery terminals? It should include a distance term. For example, was the spec "4 N-m"? That would indicate a force of 4 Newtons applied at a distance of one meter. If you applied 4N of force at 4" (.1016 m), then you have roughly 0.4 N-m of torque on the bolt. If the spec was 4 N-m, then you're ~90% short of what you need.

Of course, we Americans don't do metric. Torque specs over here are usually expressed in lb-ft (or for smaller bolts, etc., lb-in). Same thing, though, just different units. The measurement is an amount of force applied at a distance from the nut/bolt/screw/crankshaft/whatever.

I'll say this. I own a couple of torque wrenches, and I don't get them out for a project like this. "Seems about the right tightness" has worked fine. YMMV.

Cheers, John
 
Agree with DG98. Generally when tightening down bolts of this type getting it hand tight when a ratchet/wrench is usually good enough. If you want to make sure it's tight but don't want to use a gauge, you can always install a lock washer, and then tighten down until the washer is flat. At which point, it's tight as it needs to be. Plus the lock washer adds an extra layer of resistance to keep the bolt from backing out.

I usually use a 1/4" ratchet as it's much harder to oven-tighten that way. Get a good grip on the handle with one hand and give it a good twist. Don't wrench on it like you would putting a tire lug back on.

the wrench is 13cm./5 inch long....the hook of the meter is on 10cm/4inch away from the nut...
4 newton is 4 newton?????? right ????
"One newton-metre is equal to the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long"
So using your scale above if you apply it at 1m, then yes, 1N = 1N. However, if you apply the force at 0.5m, then you need to double the reading on the gauge to get the same amount. So the gauge would need to read 2N. I'm gonna guess that the wrench you used is not even 0.5m long :p
 
😲...yes i must confess, i forgot that rule, I forgot most of my physics/mechanical homework😢.
To make things worse, i am in the construction for over 35 years as a carpenter and 5/6 years as a site manager....
Don't wrench on it like you would putting a tire lug back on.
If that would be needed than you have some great cells:ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO:
 
Hmmm yes BIG update...System is working right now(no not running, its still here!)
Put in some fuses a 300A with the inverter.
100A per battery bank, the bmses are set to max 95A
I am waiting for the right switches from ali--->bidirectional and rated 125A.

Bussbares are rated 380A dc cous the system is going to be bigger and the inverter can handle 185A(54v/10000w) *1.5=277A fuse.

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Yes i toke off the spanners and fill up the gaps with wood and paper.
Paper to give them a more snugg fit so less room for expansion.
I will check this next month, i will take a cell out and see if i can do it easy or not, and place the cell back with a extra piece of paper.
But i dont think this is needed? what are your thoughts on compressing lifepo4 cells? one is stating a big no no, and the other half is stating that it is a must...so i went in between, but your thoughts please.

With best regards Igor
 
btw there is a lot more work to do.
First thing on the list...get those thin wires of my inverter and put some good ones back....3*16mm2 are out....2* 35mm2 is in...
O yeah and some more safety is really needed.
To name two out of ?????things must be done
 
BIG UPDATE

In the last one to two years i was building a extra shed.
I needed the room of the roof for solar and the room for storage.
All was scattered around and was getting to big.
I think it is time for system 3.0.
I bought all solar second handed and all my cables were bought from the scrap yard for old copper price.

On a system of just 4.5kwh on solar and just 80kw on storage we saved around 3500-4000 euro a year....
So why not get the last 2000 euro? back in our wallet?..


I learned a great deal on this forum, now it is time to put all things together.
As most of you know i worked for over 35+ years in the construction.
The floor can handle 800 kg per square meter in the middle, the roof 400 kg per m2.

The door in the picture is going to be changed according to the fire and building regulations.
I wanted to make a picture of the left wall were all the electronics are coming, but i did not wanted yet to change the light.
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Li ions is still in progress, and they will go outside, i think ~25kwh if all combined, on the shelfs is "new" arrival.

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The bmses i have are from Daly they can discharge 100A at 48v nominal and take a charge of 50A at 48v nominal.
Now looking on the roof there is atm 11kwh on power to be harvested.
Calculating with the bmses it is just 10.4 kwh what they can charge.
The solar array's are not facing all in one direction.
More bmses (minimum 2) are needed, especially when there is more pv or wind gen coming
In yellow are the batts that will be shifted in next year and in 2026.

In white is what i already have and will be hopefully fully connected within 2 months.
Incl all pv, now is just 50% connected.

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This is going to be the main hardware setup.
I must calculate a lot of cable's and fuses.
This would be my main setup.
If you have thought or comments i really would like to know.

With best regards Igor
 

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Maybe later I'll be jealous of the solar system
The whole solar costed me no more than 500 euro's....cous someone told me to get them second handed....Some ex-military guy :cool: :cool: on this forum
So why jealous?

I LOVE that shed!
Yeah i know why you love the shed....
It is not only for solar panels or not only for batterie storage but also for water harvesting (water gen and water use)....you really paid attention!
Thank you.
How i am going to handle and use/harvest the rain water, wil be a other topic, it is really to extensive, cous we are going to use it also as drinking water from our storage.
Please be patience.

This shed is built for a purpose...its just at 50%(not to brag) we need some more shed for independence. hence the beams on the ground.
roof.jpg

In yellow (mppt's)s the shed you see, in gold/dark yellow is what is new to build(future)
those two other colors/roofs need to be redone.((doorvoer)
The numbers are, sorry, in meters.
The house will not get any solar, but the rainwater will flow on this roof.
The house is not on this drawing.

This shed costed us 2 vacations, so please dont be jealous.
One money wise, one time wise
 
classification of the walls.
classification of the equipment.
Both inside......future view!
And progress building forward to this

left wall (facing south).jpg

right wall (north).jpg


When i have time i will insert cables.......those cables are no joke.....storage is no joke either!!!!

How it started?
35 years ago with lead acis and nicads....
How it started here?????with one bicycle battery, and one li ion cell.
From 5kw (gardening house/camping) (lead acid/ NiMh) to half a/of "fuckin MEGA" watt......freaking storage, thanks to 18650 and lifepo4 cells....
Lets do it!
If you have any doubts or comments or thoughts, please let me know, please.
Fuses and cables i will do when i have time.

With best regards Igor.

THIS AMOUNT OF POWER IS NOOOOOOOOO JOKE, be careful: knowledge is power, but power can be sparking and turn you to ashes.
Costed me 5 years of my life, but now we are free, when it is done.
 
The first two combiners with lightning protection are on the roof.
One for a 3kw array and one for the 2kw array.
The other three arrays are still not protected jet, cables run thru the roof to the mppt's
This will change in the near future.
Those three "old" arrays will be connected different to obtain a higher voltage.
They are now at max 88v and 80v.
Will be 120v and 130v.

More stuff is dripping in, today i got my brand new a grade lifepo4 cells....
System 2.0 will be dismanteld when system 3.0 is in use.
All the harvested cells li ion and nimh will have finaly there own place, li ion goes outside btw.
The cables i am using are ridiculus....starting at 25mm2, 35mm2, 50mm2.
Busbars will be 2x 300mm2....
Believe me i calculated again and again and again, please let me know if you see any mistake.
Cables for solar after the combiners are 10mm2.
Grounding is 16mm2 up to 25mm2, a extra ground rod (100mm2 give or take) still must be drilled into the ground.
Our ground water is ~3 meter deep.

Anyway the unboxing is taking some time, and i want to make the cabinets a bit stronger.
Alto the structure can handle 480kg per shelf, i would like it a bit stronger.....one shelf is holding 370kg of cells....

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This is going to be a long story and a very big storage....
 
How i am going to handle and use/harvest the rain water, wil be a other topic, it is really to extensive, cous we are going to use it also as drinking water from our storage.
Please be patience.

I've got similar plans for rainwater harvesting. Already have one IBC (1000l); but I probably won't get to this project for a few years. Anyhow, here's a good link to some information you may or may not have already come across.
:)

https://www.aqsolutions.org/charcoal-biochar-water-treatment/ (scroll down to see the videos.)
 
@Fukuokian

That is basically what i am going to do.
Look at my profile picture, that was one of my pet sturgeons.
She was around 1 meter 80, any bigger they dont tolerate handling anymore, my biggest one was 2 meter 80(transmontanus and Acipenser huso)
i always had koi, sturgeons and aquaria.
My pond was at its deepest point over 2 meter in depth.... crystal clear water and all the values well within their limits and the fish where well fed almost even thick/overweight, with only water adding due to vaporising.

Water is pretty simple, i needs rest to let the dirt sink.
it needs 3 stages of bacteria to clean the water and rest to let junk sink.
oxygen to feed the bacteria's and keep the water health.
It needs to be conditioning from its source. if taking ground water in my case, in need to "de iron' it.
This can be done in several methods.
I prefer to add extra oxygen and let it flock, skim and stir for egg white.
for all water at a "gravity fed filter" before coming drinking water you need to add extra filters from 80 micron up to 5 micron.
So incorporate mechanical filtering.(bacterial filtering can do the job way better!!!) in both cases skip nah/lay(natronloog in dutch))
Toilet 800-1000 micron filter, if having clear water from pond skip this.
Washing machine 500 to 800 micron filter...if having clear water from pond, skip this.
Transcalent at 3 feet/1 meter in depth, reed newspaper at the bottom!

But de iron it and make sure the waters kh gh are low! so let it rest and give it oxygen and time, and rest again.
A double "vortex" filter will be your best friend.

Ffor shower no iron and max 300 micron, low kh and gh
Drinking without uvc, uvd or uvb under 22 micron if you are sure about good bacterias..
if not sure and no use of the uv 5 micron max, 3 micron will even filter out a virus.

Drinking water between 5 and 80 micron without propper filtration need minimum uvc and uvd.
Is it not that i did not mention coal filtered water.... thrust nature and her do the work....

Making drinking water is not so difficult if you have the propper knowledge.
I dont care what your source is, you can ask me anything about this subject but know the values you want and know the values you get.
Then we can talk about filtration and condition...there is so much
Water is much simpler than li ion chemistry...in my opinion that is, and my "basic" water knowledge....is pretty extensive, i think.
I can ramble over water conditioning/quality for hours......just ask on the forum, and i will find you and if not give me a pm/headsup!



For my "project rain water":
The water i indent to collect is going to be used for toilet, filtered to max 1000 micron.
But the water will go down 3 meters first and go up 2 meter 80 to fill the storage for the toilet.
For leafs and such filtration.

When that one is full (1500 to 2000 liters) we are at 3 meters again and that extra water will flow thru some water generators to a sinking pond/pound.
this whole system will be incorporated in the roof of solar panels.
This will be a another story
After the water gen(150w? an hour 24/7 3 months long?!?!)
the water from the sinking pond/pound will go to a four-chamber filter, so i skip a fortex filter.
From here it will become drinking water, also another story.

I hope this info will help you a bit and others.
 
Now back on topic:
To do the unboxing the easy way.
It is better to lift the foam of the cells when the box is standing up and then lay the box on his side.
With the box on his side it is way easier to get the cells out of there "prison".
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What the DUCK i am building?!?!?!?

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What the F........ i am building....
This is number one........ out of four lifepo4.
EVE grade A cells, thanks to NKON in the Netherlands.
I bought more of them, they never disappointed me...never, all good cells.

Now i need to connect and charge those cells and test them.
Sigh....no sun right now.....
But after testing i will share results.

This is one battery(60kw) out of four! excluding my li ion and my NiMh
Second will be my system 2.0 that i will incorporate into this shed.
Also 60kw storage.
I hope all my (lifepo4v120kw) will be into this shed end of this year......
And buy in 2025 120 kw extra lifepo4 ex li ion and NiMh
Total of 240kw of lifepo4 storage....we need 15kwh a day for comfort living (shower bath dishes heating cooking), without ev's.......

But how to connect this....60kw storage and test this monster....one out of four!?!?!?!
See you tomorrow!

We save already 3500-euro every year
 
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