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I'm looking for some advice for building a 12V battery with 18650 cells. I see that batteryhookup has some crazy cheap LG modem cells. So far I've built a battery using Sinopoly prismatic cells and Headway cells. However, 18650s just seem to be so hard to find for a good price and decent...

Looking at a solar/LiFePO4 solution for my mobile detailing. Right now I'm leaning towards the Growatt 3kV system with a server rack or stand-alone battery storage. I could go with either 24 or 48V. I suppose the advantage of 48V is you can use a smaller gauge wire. That's about the only...

We know that Sino refers to Chinese or relating to China. Since Will is the only person who I've ever heard pronounce Sinopoly I assumed he was doing it right. But the pronunciation for Sino as in "Sino-American relations" is with a long i and long o sound. More like "sigh-know" not...

I'm building a solar generator and using the GoWISE pure sine wave 1500W inverter here: https://www.amazon.com/gp/product/B01COA0UTE/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1. Up to this point the inverter has performed flawlessly with resistive loads. I can run a 1500W heater pulling...

I'm wondering if I need a low voltage cutoff if I'm using my LiFePO4 battery (Sinopoly) with an inverter? It seems that the 1500W pure sine wave inverter will automatically turn off somewhere around the minimum safe voltage for the battery anyway. Would a BMS really help here? I bought the...

Just bought an APC Back-UPS ES 725 at the thrift store. Of course the 7Ah SLA battery was toast but in testing with a good 12V battery it seems to work fine. I would like a little more runtime so I'm considering upping the battery to a 15Ah SLA. Other than taking longer to charge I don't see...

This is not strictly a solar question but I know there are folks here who have done some work on their RV electrical systems so I'm hoping someone can help me out. I just bought a 2004 Coachman trailer and am planning to retrofit the battery with LiFePO4. To do so I also plan to replace the DC...

I'm building a small (16Ah) 12V battery using 8x HEADWAY 38120 HP 3.2V 8AH cells. I'm looking for a BMS recommendation. I don't need a lot of power, maybe 50A max and this battery won't be anywhere cold where it might need a low temp cutoff. I could poke around eBay or AliExpress but just...

These look really interesting - 20,000 cycles????? https://batteryhookup.com/collections/module-madness/products/24v-lto-toshiba-scib-20-000-cycles-10-cells