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upnorthandpersonal
@upnorthandpersonal
Member
Trusted Member
Joined: Feb 11, 2026
Last seen: Jun 10, 2026
Topics: 0 / Replies: 28
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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...

4 months ago
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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...

4 months ago
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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...

4 months ago
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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...

4 months ago
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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...

4 months ago
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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...

4 months ago
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RE: Home energy storage & battery register

I have 120kWh of LiFePO4 batteries (DIY), which I will likely expand this year to 200kWh. The original configuration 7 years ago was 28kWh with cells ...

4 months ago
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RE: Rate the quality of your heat pump design and installation

  In my opinion, it's useless then. If you are considered to have authority over who can do the work, and are intended to be a form of vetting ...

4 months ago
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RE: Heat loss calculations and how they work in conjunction with heat pump sizing

  For reference, my house heat loss only gets to 8kW with an inside temperature of 22C when it's -40C outside...

4 months ago
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RE: Heat loss calculations and how they work in conjunction with heat pump sizing

  Yes, you need something like this:     This kind of set-up is very common in places that use wood boilers here in Finland. ...

4 months ago
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RE: Tell us about your Solar (PV) setup

  Or as we call it here, Tuesday 😉  

4 months ago
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RE: Rate the quality of your heat pump design and installation

@toodles The difference between Tukes and MCS, as far as I can see, is that MCS is optional, and has no power to enforce anything. Tukes is a gover...

4 months ago
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