For some additional thoughts. my system is 10.1kw
From April - September I will produce betwee 1300-1800 kWH/month
My average usage (without solar is) 600-900kWh/month
I self consume about 30% of what I generate
So given an average summer month whereL
I will import 350kWh, self consume 450kWh, and export 1100 kWh
the savings roughly looks like this:
Imported Energy Charge (0.2585/kwh)= $90.48
Exported Energy Credit (0.2585/kwh)= -$284.35
Avoided Energy Charge - Self Consumed ($0.06/Kwh) = -$27 ( I calculate this at the rate I would have, had I not installed solar and just locked in with ATCO)
Imported Energy T&D (simplified as $0.07/kWh) = $24.50
Avoided Energy T&D - Self Consumed (Simplified as $0.07/kWh) = -$31.50
Total: -$227.87
I skipped some of the admin fees, which are fixed daily costs, but the savings are roughly calculated correctly... within 5-10% due to my lazy simplification of the fees.
I can run these types of numbers from April - September generating a bill credit in excess of $1000 at which point I switch back to an importer rate of $0.08/kWh and don't have to pay any bills over the winter months.
In the event I cant "spend my credit" the provider will cut me a cheque if I choose, as long as the credit exceeds $200 for 2 consecutive months.
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