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Why is it so hard to find a bms with low temperature protection when, for half of us, it's mandatory? It's not trivial. In Wisconsin temperatures never get above 32°F (0°C) for months every year. One, not very cold, night destroying thousand of dollars is insane.

Studying a bare bones 12v lifepo4 from scratch. Maybe a 4 cell, 200 amp hour, 150amp load, freeze protection and stupid (not smart). AliExpress must list 5000 bms's. I like the idea of scratch build. Fixable and cheaper. Does anyone know a bare bones bms that would work? Sort of like what come...

Have a 60a Esmart3 (solar charge controller) charging lead for a year now. Fine. It says good for any battery profile using their wifi dongle or a RS485 serial bus. Could it be as simple as buying any RS485-usb cable and plugging it in the laptop? Would like to sort this out before investing in...

Want one meter, other than an oscilloscope, that can test all circuit component and measure everything. Even features I don't understand, yet. Cheap. Tired of learning I have the wrong tools.

Just wondering if anyone's taking advantage of today's sale. Here's a video about shopping Singles day. Slanted toward electric bike stuff but still valid to our interest. Shopping Singles day

Received only 30 minutes ago. Plugged in a Kill-a watt with no load, 50hz, plugged in 1000w resistive load, 50hz. plugged in a fan, a little slower. Other than that it pumped out 1500w without breaking a sweat. Should I care? Does it matter? Should I complain? Update: Repaired

Is there such a thing as a fused power cord. Short one with multiple outlets would be perfect. Shorted out my twenty year old modi-sine inverter trimming trees. It's dead. The chain saw was off but still rotating snagging the cord. Don't want it to happen again when the new (expensive) bigger...

Contemplating a battery of lifepo4 cylindrical cells. Using non conductive buss bars plus the cu buss bars would tie all the loose cells into a solid block.

Can measure volts, ac current and ohms but not dc current. Is there something I can cobble together? Nothing elaborate. Don't want to steal the one out of the old fashion gauge cluster. Don't want to buy another clamp meter just for a couple minutes use.

I assume these low profile lifepo4's function similar to standard but don't know for sure. They would allow me to lower the false floor in my minivan a good 4 inches. :) Swell less too. Unless there's a problem with the supplier LiitoKala. Anyone?

I've read yes, I've read no. Erring on the side of caution when shopping. All the switches found looked like they belonged in a breaker box. I imagined something simpler.. 720w parallel mppt 12v On a related matter: Is there any chance, if the scc fails, say, 100 battery amps (4 gauge)...

The instructions stressed hooking up the battery before hooking up the PV panels. Fine. Only thing is, there's a fuse between the mppt and the battery. What would happen to the mppt if the fuse was tripped (no battery) and the PV panels were producing, say, 700 watts? Purely hypothetical