Total beginner here.
This is for a hobby project, which, for a start, would not be connected to the main grid. I am aiming for a 24 V battery system, but I am not certain. I want to attach a inverter at some point in the future, but for now I am only going to use 24 V appliances.
It's for a home usecase and I have it all witin my small isolated garage. So it should not get colder than 10°C at the winter. (Location Denmark, EU)
What I have got:
- SmartSolar 150/45
- 4 x 365 W panels (In a 2s2p config)
- Pmax: 365 W
- Vm: 34,00 V
- Im: 10,74 A
- Voc: 41,30 V
- Isc: 11,30 A
- 2s2p setup
- 2 x 2 series
- Voc: 82,60 V
- Isc: 11,30 A (Factor 1,56 * 11,30 A = 17,63 A)
- Connected with 6mm2 wire from panels to Y-splitter
- Overall
- Voc: 82,60 V
- Isc: 22,60 A (Factor 1,56 * 22,60 A = 35,26 A)
- Connected with 10mm2 wire from Y-splitter to SmartSolar
- 2 x 2 series
- Fuse/Breaker box 40 A between panels and SmartSolar
- Manual switch between SmartSolar and future batterypack (100 A)
What I haven't got yet:
- Batteries (LiFePO4, AGM or other?) (No high wattage demand appliances as of right now)
- Inverter (Future project)
- BMS (Is it needed if the batteries have one?)
- Shunt
- Energy battery monitor
My questions:
- If I buy a/multiple batteries with built-in BMS, do I need to get one seperate for the system (Between SmartSolar and the batteries?)
- Should I get a SmartShunt or other similar device?
- Do you ahve any recommendations for other equipment for my project?
Bonus info:
I want to have a RaspberryPi 4 runnning the Venus GX OS or similar, so I can integrate it to my Home Assistant setup. (I believe it's a cheaper alternative to the Cerbo GX, and I have the RPi laying around)