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Last seen: Aug 16, 2026
Hi @travellingwave If your system is on heatpumpmonitor.org then a chart similar to what @cathoderay is suggesting is already available. If you go ...
True there is a variation but importantly it's understandable. The ~560W value occurs before a defrost at 5C and so the ~560W is at the colder end of ...
@cathoderay The input power is largely determined by the compressor speed (it's by far the largest component) and that is set by the controller alg...
Or part of a cycle like a defrost or ramp up. Being able to set an arbitrary interval gives the greatest flexibility and doesn't preclude the use of h...
Hi @cathoderay This is a reply to two of your posts together. It's not a room stat per se but acting as one at the moment and its use...
Hi @sunandair I've posted charts showing the input power ramping up to the same 1-1.5kW in both (defrost and non-defrost) cases. Your image doesn't...
Hi @sunandair The analysis I previously posted was 90+ minutes long and not just 11 minutes. All of the electrical energy passing into the system go...
Hi @cathoderay If it helps any here's this period with recorded numbers: The off period is 1h22m and the on period is 2h44m, the system's steady ...
No worries! The WC curve is setup for our usual 20-21C IAT so that's what the heat pump is trying to achieve, but the "thermostat" is set lower and so...
@cathoderay As I wrote above, it's a "non-defrost restart", so it won't look like a typical defrost. The peak flow temp is only 28.5C and the CO...
In the context of the described time periods yes but not the conclusion of the analysis, which is more important. During the defrost less electricity ...
@sunandair I haven't made any claims of saving energy, @cathoderay has so maybe you are confusing the two of us? My analysis showed that a small ad...
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