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I'm confused about optimizing 7 watts as important -- rough numbers, 7 watts is 61 kWh/y. If you assume US-average prices of $0.16/kWh that's about $10/year.

edit: looks like for the netherlands (where he lives) this is more significant -- $0.50/kWh is the average price, so ~$32/year



Althoug outside the scope of the artice, I try to keep a small electricity usage footprint.

My lowest is 85Kwh in an apartment a moth but that was because of perfect solar weather.

I average around 130 KWH a month now.


CA is average ~$0.5/kWh.

Where in US matters a lot. I think OR is pretty cheap.




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