Hi everyone,

I've received a few quotes, and I'm struggling to understand why the prices vary so much when the usable battery capacity and inverter size are relatively similar.

The main options I've been offered so far are:

Solis: 20kWh battery capacity with a 6kW inverter – £5,800.

Alpha ESS : Around 18kWh with a 5kW inverter – approximately £5,800.

Fox ESS EP12: Around 20–21kWh usable capacity, depending on the configuration, with a 6kW inverter – approximately £7,580

Sigenergy: 2x10, 5kw inverter £8000

**Hinen:**new A15 model, although I haven't received a price yet.

These are the approximate figures I have so far, and the systems may not be directly comparable in every respect. Ideally, I'd like to compare them with a 6kW inverter across the board.

What I'm struggling to understand is the actual difference in quality between these brands. From what I've been told, the warranties are fairly similar and they all seem to perform in much the same way.…