Hello! I need some feedback on whether it's worth replacing my EP5 with an EP12. We got the system installed in April 2025 and it's been brilliant. The ep5 is non heating version that has done 572 cycles, with a SOH of 92%. In hindsight I should have went for the ep11 but I didn't know at the time that you cannot mix and match different sized batteries. With recent weather we've drained the battery overnight with fans, and regularly drain it quickly in the winter months as I usually game on my PC in the evening. So I have 2 options:
- Grab another ep5 with a junction box, and have no heating element. I think I read somewhere about mixing different SOH not being a good idea, but someone please correct me.
- Grab an ep12 with heating element and try and sell my ep5 (no idea what it would go for....or even if I could sell it?!?!)
What do you lot think? I have a H1 Gen 2 inverter and 5kw/h export, with 12 panels (but I doubt that changes anything here)
