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I'm not clear what point you're making about PDUs. Re 120V outlets, while batteries don't need to supply the full peak load, they are more effective the more o
by tempestn 2mo ago
I'm not clear what point you're making about PDUs.
Re 120V outlets, while batteries don't need to supply the full peak load, they are more effective the more of it they can supply. And a home with a heat pump or baseboard heaters, electric range, EV charger, or dryer for example is going to at times significantly exceed the capacity of the 120/15 outlet. Doesn't mean the battery would be useless, just that it wouldn't be as effective at its primary purpose of load shifting as a 240V system, and therefore less economical.
- NavinF 2mo agoMy point about PDUs is that "people don't tend to have one just free" is irrelevant. It's easy to split a 240V outlet into multiple outlets. One of them can be used to inject power. The copper doesn't care which way the electrons go. Heat pumps and baseboard heaters are pretty uncommon in the US. Natgas furnaces are nearly 100% efficient so I don't expect that to change any time soon
- tempestn 2mo agoOh, I see. Yeah, good point about splitting a 240V outlet. Not as convenient as having them everywhere, but it'd certainly be possible. NG may be 100% efficient, but heat pumps are like 300%+ in terms of electricity to indoor heat. And you get air conditioning.