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BMS Choices
#31
Yeah, CE did several tests on them. I think, not 100% sure, that he found that some needed to be resoldered on some of the wires. Just double check all the connections to makes sure everything is solidly soldered.

You can parallel as many batteries as you want to the UPS. Parallel doesn't matter, overall. The only problem is the UPS will be expecting X-Ah available when Y-Ah will actually be available. Some UPS's you can change that setting. The reason it's a problem is that if the UPS has used X-Ah, it might initiate a shutdown procedure. However, it's supposed to look at SOC to determine that.
The other issue with multiple parallels, is the more you have, the longer the UPS will take to charge them (duh!) Wink
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#32
(12-16-2017, 07:18 PM)Korishan Wrote: Yeah, CE did several tests on them. I think, not 100% sure, that he found that some needed to be resoldered on some of the wires. Just double check all the connections to makes sure everything is solidly soldered.

You can parallel as many batteries as you want to the UPS. Parallel doesn't matter, overall. The only problem is the UPS will be expecting X-Ah available when Y-Ah will actually be available. Some UPS's you can change that setting. The reason it's a problem is that if the UPS has used X-Ah, it might initiate a shutdown procedure. However, it's supposed to look at SOC to determine that.
The other issue with multiple parallels, is the more you have, the longer the UPS will take to charge them (duh!)  Wink

watched a few of CE's videos over seems the bmses are only bmses in the sense that they control high voltage and low voltage and some of the control chips have a wide voltage range  both higher and lower than in the typical powerwall   ie high side over 4.2 volts low side 2.3 volts. no balancing He tested the LG hooverboard batteries.

later floyd
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#33
The main problem is the inverter.

Has anyone come across a reliable 36V Pure Sine wave inverter in the 2,000W to 6,000W range.
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#34
Not sure how Reliable the Reliable Rinverter inverter is but i am getting a 3000 watt 36v pure sine wave inverter.
Hoping for at least 2500 watts but will settle for what i get.

Later floyd
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#35
(11-17-2017, 06:59 PM)not2bme Wrote: Looking for a balance myself too, not willing to spend the $500 for the batrium just yet. Was reading owitte's powerwall and noticed he used this chinese 1s balancer. $20 each so looking at $140 for 7s and $280 for 14s. No monitoring or anything, but if on budget then may be a choice. Once my pack goes up then I'll see how much fuss it is to maintain balance. I may just get one of those cellmons and alarm if they start to deviate

These ones are nice, but, correct me if I am wrong they wont cut off on low voltage or high voltage , they will keep cells balanced to their most common voltage . right?
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#36
(12-08-2017, 10:42 PM)Korishan Wrote: @Charly: What daromer means is that you replied "inside" the quote. Please make your replies "outside" the quote section. It is hard to determine what you are responding to as to be able to really understand it, one would have to keep jumping back to the original post to see what the original text was.

Sorry guys, didn’t see...
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#37
(01-08-2018, 07:09 AM)sunnyeveryday Wrote: The main problem is the inverter.

Has anyone come across a reliable 36V Pure Sine wave inverter in the 2,000W to 6,000W range.


FloydR:   "Not sure how Reliable the Reliable Rinverter inverter is but i am getting a 3000 watt 36v pure sine wave inverter."

Five weeks later.

Any update ???


I came across   https://www.sigineer.com/product/5000-wa...sine-wave/

The MOQ says   "Model #: APC5036NC  (MOQ: 10 pcs)"


But when I emailed them, Franklin Chu said...    "We have 5KW 36V inverter model, but we didn't stock it, and  the MOQ
for production is 5 pcs.
If you need order 5 pcs and wait for 30 days, pls let me know."

MOQ = Minimum Order Quantity

They also claim to be ISO9001.

That is tracking of parts etc.

Not sure it means anything about the quality of the product.

It seems 36V has largely gone away and there is very limited product, which is unfortunate.
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#38
I bought a batrium system. Actually kinda happy I did. It's just nice. Save up guys, is worth it. I just bought it a week ago. Not bad shipping either.
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