RV10flyer
Solar Wizard
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I install JK BMS, double pole dc breaker, t class fuse between cell 8 & 9. You are right on price. About $2850 for my 304aH 16S.
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Who is still building DIY batteries
- Thread starter JJJJ
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houseofancients
Solar Wizard
Well , my calculation us based off my seplos Mason diy kits, that come with everything
I built a 8s 280Ah, 24v battery for my boat with 200A JK BMS with 2A active balance. Just ordered 8x EVE 105Ah cells from 18650 battery store to build a second smaller bank, also using a 200A JK BMS with 2A active balance. I don't need huge battery capacity but the resilience of two parallel banks appeals
RV10flyer
Solar Wizard
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Their 105 and 304 grade A cells require no top balancing, build, take them to 3.60V (my OVP), JK goes to 100%, the 2A balance current does it’s job. Then I absorb at 55.7, float at 53.7V from then on out.
I will balance them anyway. It does now harm. Easy to do.
OffGridForGood
Catch, make or grow everything you can.
I have been following along that thread for over a year now, ordered some parts for the comms for the JK.
{+1 for the JK BMS = it just works!}
houseofancients
Solar Wizard
houseofancients
Solar Wizard
they were
Envisions grade a are now , as they are cheaper, perform the same or better , i can get them locally ( 30 minute drive) , and are the exact same dimentions , so they fit the seplos mason boxes i use exclusively
PreppenWolf
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There is no other way I could have built my 104kWh bank for $12k.
If I could buy battery storage at 10kWh/$1k I would stop building.
If I could buy battery storage at 10kWh/$1k I would stop building.
houseofancients
Solar Wizard
bought mine at Nkon ( the netherlands - out of stock now ) , and i know fogstart (UK) has also been selling the grade b's
RV10flyer
Solar Wizard
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The first diy 100kWh with JK BMS’s $17.5k from Aliblabla. Try over $30k and no repair-ability if you go with SS, with about the same warranty and customer service.
PreppenWolf
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I'm using BYD semi-blade EV heavy truck cells. They are seconds from production lines. Monitored by Overkill BMSs.
I keep looking at the newer BYD full blades for a smaller system to separate my house/garage which are on a single system right now, but I honestly might grab one of those Hysolis Apollo 5k all in one units Will just reviewed for my new cabin to have something portable that I can throw into my camper and make it dual purpose.
I keep looking at the newer BYD full blades for a smaller system to separate my house/garage which are on a single system right now, but I honestly might grab one of those Hysolis Apollo 5k all in one units Will just reviewed for my new cabin to have something portable that I can throw into my camper and make it dual purpose.
cs1234
Solar Wizard
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That UL cert costs some bucks!
RV10flyer
Solar Wizard
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…and a steel case. I guess. Mine even have a 125A Class T between cell 8 & 9. I get to look at all busbars and cells…definitely not for everyone, especially if you like dropping tools, chains, wires on top of batteries by accident.
cs1234
Solar Wizard
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I have a container full of random screws and bolts and such, as I'm sure we all do. I was messing with it on a shelf in the garage and I accidentally knocked it over on top of a bunch of my 24vdc lifepo4 batteries on another shelf.. talk about an "aw shoot" moment. Good thing those batteries were just 24vdc or there might have been some good arcing with how some of those big bolts landed. ?
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