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I do control my multiplus2 48/3000 over ve.bus with an esp32. Needs an rs485 converter and a 12v to 5v buck. The esp32 gets net power from a shelly 3EM over wifi and calculates how many watts the multiplus should produce to zero out net consumption. Or it calcualtes how many watts it can store...

Hi, I have bought 2 x 12V 30Ah LiFePo4. I have them in series for my "Solar Buffer" project. I charge them when there is excess solar and drain them if there is excess consumption. Charging can be set up to 30V 5A, discharge is fixed 130W, or about 4 A. What are the charging / draining voltage...

I do measure house consumption / solar feed with a shelly 3EM(3-phase system). I use two 12V 100ah lead batteries, 24V. The inverter is a china GDI 18V costing $25 set to 150W (240V version). Controller ist a board with esp8266 and 4 relay, costs $8. Charger is a gophert 30V 5A, costs $40, but...

Today the warm water heatpump runs with night electricity, about 10ct/kwh. Day tariff is 20ct/kwh. Heats up a 300 liter tank to 55 deg C. I can program the pump to turn on and off at a certain time, but i can not remote control it. The pump absolutely doesent like brown-outs or to be switched...