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TLDR: Want to use an old cheap server UPS because it already has battery + grid-charger + inverter built in. Also this things are really cheap usually. Ok, so I am trying this as a hobby project and the idea is to build a rather small and rather cheap solar system. Now I get that none of this...

Hello, today I built my first 4S 12V LiFePo4 battery. I use a Daly Smart BMS (R05W-GB19). With the BMS I have a bluetooth module and a USB cable. (Bluetooth has 4 wires and is plugged in the "UART" port of the BMS, USB has three wires and is plugged into the "Monitor" port on the BMS). While...

Hello Dear DIY Solar Community, my Van Build currently has two 100W Panels with a Tracer MPPT and a flooded lead acid battery. While Driving a simple relay is what connects my solar-battery to the starter battery of my vehicle using a 200A relay. This solution is simple and works. Currently I...