Recent content by cali8484

Interesting. That's a lot higher running/peak ratio than regular HVAC. If your particular system only pulls 2kW max then it seems excessive to design backup for 10x that.

So, that's 26kW+ peak (21kW+ continuous @ 80% of peak) for heating? I don't know much about GeoThermal but I thought it's supposed to be efficient so the electricity requirement is surprising to me. Running batteries or generator even for 21kW of heating seems very inefficient. Have you...

We should just all work to get the POCO's to raise rates as much as possible :cool:

Did you get a quote for Enphase battery? It would be interesting to see what financial ROI Enphase thinks you would get with a battery.

True but that's not really different with or without PV. Putting 2 heaters on the same circuit is the real problem. Similar to the risk of people putting extension cords on extension cords. A small PV makes little difference to such risks.

Sorry I don't see any part of the circuit carrying 20A. I can see 16A at most supplied from the 15A breaker and that should trip it at some point.

This is has been done in Germany for a while now. No permit, no inspection, no interconnection agreement ... no problem. No need for US to wait. One reason why residential solar cost in Germany is half of US. IIRC, those guys are dealing with much higher (>>800W) power systems. Are you...

Did the off-grid system require permit and inspection?

It would be very unusual if Tesla is triggering overload fault based on voltage. For failsafe overload/short-circuit protection it's typically based on current. However, Tesla could be using a similar type of inverse definite minimum time (IDMT) curve for current. For any overload fault...

Sure but then they should be able to provide at least the threshold that was violated given that they actually take the time to record and report the fault.

A bit surprising that they would not know the surge level that caused a shutdown.

It appears that SPAN uses the unsupported API on the Tesla Gateway. You may want to troubleshoot the Gateway based on the info here SPAN - Smart Electrical Panel.

So, the hot hub is one of the backed up loads? Are these loads new after the PW's were installed? If so, the overload explanation would seem more plausible. The graphs do appear to show a pretty large power swing on the PW's right before they went down. Also, there is an alert for under...

It's risky to assume the external DC-DC current control will work as expected. Unless you know the specific impedances of the power station input and DC-DC output are compatible the MPPT can easily end up pulling the voltage way down. Fixed voltage and current supplies typically work much...

1500W should be okay for inrush. What's the DC charging current limit in the power station? Does it have adjustable control for DC charging current?