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upnorthandpersonal
@upnorthandpersonal
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Eminent Member
Joined: Feb 11, 2026
Last seen: May 26, 2026
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Topics: 0 / Replies: 26
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RE: Heat Pump Operation in Summer - Valliant 7kW

I do the same: cool my large buffer (3000L) to 10C, pump between 14 and 18C water (depending on the humidity) in the underfloor circuit. It works nice...

23 hours ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do Fridges and Freezers have COP ratings?

Technically they do, and you could calculate it (and is used for the energy efficiency rating), but it's not something that is generally reported dire...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Plastic or Copper

Go with PEX/PE-RT/Multilayer Pipe (plastic in other words). You have a lower thermal conductivity than copper, so you get better performance. It's typ...

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Forum updates, announcements & issues

If I may offer a suggestion: I am admin and mod on a forum with over 160k users. When you grow a forum, it becomes harder to shift from one software t...

3 months ago
Forum
Introductions, Forum Rules & Updates
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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.

3 months 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...

3 months 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. ...

3 months 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 ...

3 months ago
Forum
Energy Storage
Reply
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...

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
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 ...

3 months 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...

3 months ago
Forum
Energy Storage
Reply
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...

3 months ago
Forum
Energy Storage
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