Winter Charge Level - Batteries not in use

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StealthChesnut
Posts: 23
Joined: Mon Oct 17, 2022 2:31 pm

I'm in a situation where I can't get onto a cheap-rate night tariff, and don't know how long it will be before it's resolved (over 3 months with no updates from octopus :( ). My solar production has got above 50% only once in the last 10 days, with most of the time the batteries are at min.soc (20%).

Would it be better for battery life to move the min.soc to 50% (or higher?), at least until I can get on a better tariff? Do the HV2600 get affected much spending long periods with little charge?
Creator of the HA-FoxESS-Modbus Integration for Home Assistant

6.7kW 18 panel East-West split solar array
H1-5.0 with 4x HV2600 Battery Storage
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Will
Site Admin
Posts: 280
Joined: Thu Oct 13, 2022 5:56 pm

Hey,

the HV2600 is happy with 2-3 days at the bottom of the cells. If you're always running on the low side I would increase slightly to 15 or 20%.
The HV2600 uses LifePO4 cells so keeing it at 50% or above like for LithNMC is not required for these packs. They're happy at 100%, they're happy at 10% and they love full range discharging daily. It's a very robust battery.
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StealthChesnut
Posts: 23
Joined: Mon Oct 17, 2022 2:31 pm

Great stuff, thanks for the info Will!
Creator of the HA-FoxESS-Modbus Integration for Home Assistant

6.7kW 18 panel East-West split solar array
H1-5.0 with 4x HV2600 Battery Storage
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