Posted by MarkB_MI on February 17, 2021 at 05:57:34 from (174.245.19.196):
In Reply to: Off grid power posted by jon f mn on February 17, 2021 at 04:55:18:
If small power plants could be almost as efficient as big plants, there would be no big plants. After all, the cost of transmitting power over long distances is enormous.
You're not going to recover much waste heat. For example, if you have baseboard hydronic heat, those systems typically run at 175°F. If your liquid-cooled generator engine is running at 200° you won't have enough delta to transfer much heat.
An efficiency problem with small generators is they are most efficient under almost full load, but most of the time they aren't putting out much power. Inverter generators are better in this regard, but still can't match the efficiency of a large plant operating under load. Yes, battery storage is better, but if you're going to invest in big battery banks you might as well go 100 percent solar.
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