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by bacheaul
1487 days ago
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Rather than free, I'd say the marginal cost would be more like what you could otherwise sell the electricity back to the grid for. eg. if you're paying $0.25/kWh to buy from the grid, and selling back to the grid at $0.06/kWh, then you're really "paying" $0.06/kWh in opportunity cost to charge your vehicle from your solar panels. |
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