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upnorthandpersonal
@upnorthandpersonal
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Joined: Feb 11, 2026
Last seen: Feb 20, 2026
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Topics: 0 / Replies: 22
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RE: What determines the SOC of a battery?

The easiest way to analyze what's going on is to post screenshots of the BMS configuration parameters and the inverter settings.

22 hours ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

  SoC can be very different, voltage not. Since voltage settles quickly, it's actually very easy to add LFP batteries in parallel to existing a...

2 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

  My advice with LFP: stop worrying about battery life. You're talking 4000 cycles, from 0% to 100% before you reach 80% of original capacity. ...

2 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

My guess at this point is that the BMS communicates state of charge to the inverter, and the inverter switches off based on that. If the 100% trigger ...

2 days ago
Forum
Energy Storage
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RE: Underfloor Heating Installation Issues with Heat Pump

  Ok, I'm not an expert in underfloor heating and I'm not from the UK, so I can't help you there, but every time I read something like this I w...

2 days ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Safety update; RCBOs supplying inverters or storage batteries

  Germany, and other EU countries have historically had a single RCD for every circuit, not one per circuit. These are typically type A or F/B ...

2 days ago
Forum
Solar Photovoltaic (PV)
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RE: What determines the SOC of a battery?

  Yes, but the issue is that 100% the inverter gets from the BMS is not really 100%, it's likely reaching 100% because one cell in the pack goe...

2 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

@batpred   From your numbers (if I read them correctly, the graph is a bit small):   - You stop charging at 55V. If this is a 16s p...

2 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

  Check the image below for a typical charge/discharge curve at different rates for LFP. The 'middle' part is, for all intents and purposes, fl...

3 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

  LiFePO4 (LFP) does not mind going to 100% and 0% state of charge. In practice, stay below 3.55V per cell at the top, and say 3.0V at the bott...

3 days ago
Forum
Energy Storage
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RE: What determines the SOC of a battery?

You can not accurately determine state-of-charge of a LiFePO4 battery by voltage, with the exception of the so-called 'knees', that is, where the batt...

3 days ago
Forum
Energy Storage
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RE: Tell us about your Solar (PV) setup

  Actually not that far, however, the cost of my initial system (10kW solar and 28kWh battery, with inverters, charge controllers, etc.) was sl...

6 days ago
Forum
Solar Photovoltaic (PV)
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