I have 7 Pylontech 4.8 KW batteries, in the UK the weather is poor at the moment, foggy, cloudy and raining.

The batteries are down to 10%  (stop discharge setting) and I am not getting much from my 19 KW panels, can you leave them at 10% for several days or should I charge them up 50%/100%?   I have charged them a couple of evenings to 50% and then allowed them to discharge overnight and early morning. Loading of house is 20 Kwhrs/day.

What is best for the Batteries?

2 hours ago, David-OLW said:

I have 7 Pylontech 4.8 KW batteries, in the UK the weather is poor at the moment, foggy, cloudy and raining.

The batteries are down to 10%  (stop discharge setting) and I am not getting much from my 19 KW panels, can you leave them at 10% for several days or should I charge them up 50%/100%?   I have charged them a couple of evenings to 50% and then allowed them to discharge overnight and early morning. Loading of house is 20 Kwhrs/day.

What is best for the Batteries?

My own sweet spot is 20-80% and a 100% to balance about every 3 weeks.

5 hours ago, David-OLW said:

I have 7 Pylontech 4.8 KW batteries, in the UK the weather is poor at the moment, foggy, cloudy and raining.

The batteries are down to 10%  (stop discharge setting) and I am not getting much from my 19 KW panels, can you leave them at 10% for several days or should I charge them up 50%/100%?   I have charged them a couple of evenings to 50% and then allowed them to discharge overnight and early morning. Loading of house is 20 Kwhrs/day.

What is best for the Batteries?

Are you on any type of smart tariff? If so charge them during the cheap time and use during the day.

If not I would just make sure you keep them slightly charged say 20% and probably turn off discharge on the inverter while there is little PV, depends on the inverter. You can then turn dicharge back on when they have charged and repeat. I wouldn't want to keep them at 10%. (Plyon normally supply them at 50% which is the best storage %).