TomC4306
Solar Obsessive
Deleted
Upgrading 15s Battery to 16s
- Thread starter boarder2k7
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TomC4306
Solar Obsessive
Yeah ??
boarder2k7
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Sounds good thank you, I'm going to order these ones then
JKBT 8S-16S 100A 1A Active Balance inverter BMS
JKBT 8S-16S 100A 1A Looking for the best JK smart active balance inverter in the US? Shop from Sriko Batteries, the top online store in the US.
srikobatteries.com
42OhmsPA
What's in a title?
Lots of JK options here.
I'm happy with my 3 JBD 7s-21s, besides balancing.
I'm happy with my 3 JBD 7s-21s, besides balancing.
boarder2k7
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Thank you for the link. I have a little trouble with it though, how is it verified that these aren't knock offs? The reviews are awfully suspect to me
sunshine_eggo
Happy Breffast!
That is allegedly the actual JK BMS store.
That's the only way I would consider using AliExpress.
I would still prefer ordering from a North American source when possible.
42OhmsPA
What's in a title?
They are a reputable storefront on ali... I found the one I linked from links in this thread.
JK BMS Deal AliExpress
JK BMS If you're looking to snag a JK BMS for only $108 from a known (reliable) seller of these on AliExpress check out the link above. It's a promotion that only allows you to purchase one at a time. I just bought 4 via separate transactions. Not sure if they will catch that or shut it down...
diysolarforum.com
42OhmsPA
What's in a title?
I've ordered 3 JBDs from here
JIABAIDA Official Store
JIABAIDA Official Store
JIABAIDA Official Store - Amazing products with exclusive discounts on AliExpress
Discover the wide range of products from AliExpress Top Seller JIABAIDA Official Store. Enjoy ✓Free Shipping Worldwide! ✓Limited Time Sale ✓Easy Return.
a.aliexpress.com
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42OhmsPA
What's in a title?
Oh and those are the connectors you want for the JBD Bluetooth port on the smart BMS. I ordered the RS485 adapters from overkill.
You could use the JBD with the 15s battery and rewire to 16. I started with an 8S pack and rewired to 16s.
You could use the JBD with the 15s battery and rewire to 16. I started with an 8S pack and rewired to 16s.
boarder2k7
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Thank you very much, it is very hard to tell from mobile who the seller was on aliexpress so I wasn't sure. I'll check it out tomorrow from a desktop.They are a reputable storefront on ali... I found the one I linked from links in this thread.
JK BMS Deal AliExpress
JK BMS If you're looking to snag a JK BMS for only $108 from a known (reliable) seller of these on AliExpress check out the link above. It's a promotion that only allows you to purchase one at a time. I just bought 4 via separate transactions. Not sure if they will catch that or shut it down...
Regarding JBD, it sounds like the JKs have better balancing which I think will be key to the success of this upgrade project with the cells that don't quite match.
Overkill uses JBD. I have three 250A JBD BMSs and they are all great. I would buy them again.
You didn't answer the question: How much current do you need your BMS to handle?
boarder2k7
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Missed the question apparently.
I was aiming at 100 amp BMSs just because that supports 1C rate on the batteries, but I suppose a 60 amp BMS basically gets me to max capacity for the 3kW EG4 inverter I'm eyeing for this project.
EG4 3kW Off-Grid Inverter | 3000EHV-48 | 3000W Output | 5000W PV Input | 500 VOC Input
Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL
signaturesolar.com
I would definitely use more than a 60A BMS for that inverter. You want one rated higher than the max current you could draw. 100A should be fine.Missed the question apparently.
I was aiming at 100 amp BMSs just because that supports 1C rate on the batteries, but I suppose a 60 amp BMS basically gets me to max capacity for the 3kW EG4 inverter I'm eyeing for this project.
EG4 3kW Off-Grid Inverter | 3000EHV-48 | 3000W Output | 5000W PV Input | 500 VOC Input
Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL
boarder2k7
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I will have two batteries in parallel at least, but yes I was thinking 100 amp would be appropriate anyway.
It is likely to only be wired such that I'll use 1500 watts of its output at the most with what I have planned. Of course plans do have a way of expanding over time!
It is likely to only be wired such that I'll use 1500 watts of its output at the most with what I have planned. Of course plans do have a way of expanding over time!
DIYrich
Solar Wizard
Sol-ark 15k can go up to 63v on the battery. A 17s battery would let it deliver the full 15kw off battery.
boarder2k7
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While an impressive piece of hardware, a Sol Ark 15k is a nearly $7000 inverter, and I'm looking at the $700 EG4 3k. I can't spend an order of magnitude more on the inverter. I have no need of future proofing my batteries for a monstrous inverter like the 15k. If I ever get to a fully self sufficient state that would require something like that, I'll surely have better batteries than these to make it happen.
42OhmsPA
What's in a title?
Shop around a bit... You should be able to get a 5k from the OEM for ~$600 shipped.
With two batteries in parallel, I'd use two 100A BMSs. That way you can completely remove one battery for maintenance if needed and leave the other one working.
The normal load isn't an issue generally, it is startup current and other temporary surges that will get you.
boarder2k7
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Do you have a suggestion on where to purchase from? I had been planning on signature solar because I've heard good things about their support.
Edit: also not sure that I really need as much as 5k anyway, though if it was the same price as I'm looking at I would go for it. My plan is to use this to run my home server rack (about 350 watts peak), with the ability to provide backup power for my furnace (250 watts while running) and one refrigerator and one chest freezer (100 watts each running, though the refrigerator defrost cycle is approximately 600 watts for 30 minutes once a day).
It will be set up in such a way that I can use it to bolster my small generator by using it to load level while the generator is running, allowing the generator to provide a constant output (its about a 1200 watt unit) to charge the batteries and use the battery/inverter system to handle all the sudden load changes that my generator struggles with.
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