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rolandp asked

extending the functionality of the ESS system

Dear Ladies and Gentlemen,
I have a suggestion for extending the functionality of the ESS system: besides the settings - optimized with Battery-Life; - optimized without battery life; - keep the battery charged; - External control; In my opinion, an additional operating mode makes sense "keep priority battery via solar in the charged state + provide additional solar energy to the AC-Out available."
Thus, the battery no longer bogs for days in the weak state of charge around and the existing solar power can be supplied to the consumers after battery charging to 100% and thus be used.
At night, the battery is left unused, the consumers are supplied via the mains; During the day, the battery is first refilled and then the consumers are proportionally operated to the grid with solar power.

I would be pleased if you can check this variant and wish you a nice day!


Roland P

SOC
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boekel avatar image boekel ♦ commented ·

When will the battery be used in this scenario? the way you describe it it sounds like it is always charged.

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mihair answered ·

Not a good idea for LFP batteries. 100% SOC for extended period of time is detrimental to battery life. In fact, sitting at any SOC value over 80% could harm an unused LiFePO4 battery

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rolandp answered ·

I have lead acid batteries! And I think the idea is not so bad: With a relatively small solar system, I could use this mode with the few solar power in the house and extend the battery life if the batteries are kept at SOC 100%

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