Solar planning guide
How to Read Your Utility Bill for Solar Planning
Find monthly kWh, fixed charges, export credits, and rate-plan clues on a residential utility bill before using a solar calculator.
Start with total kWh for the billing period
Solar sizing starts with how much electricity the home uses. A single monthly kWh number is usually enough for an early estimate.
Separate energy charges from fixed charges
Customer charges, meter fees, and minimum bills can remain after solar. Fixed charges matter for payback even when energy use drops.
Look for export or net-generation lines if you already have solar
Credits, banked kWh, NEM balances, or buy-all/sell-all lines explain why a bill may still be high with panels installed.
Check whether the rate plan is flat, time-of-use, or net billing
The label on the bill may not say everything. If the bill mentions peak/off-peak hours or export compensation, use the utility-aware calculator next.
SolarCalcNow provides planning estimates only. Results are not installer quotes, engineering designs, tax advice, financing recommendations, or utility interconnection approval.
What to do next
After you have monthly kWh or bill amount, compare the same assumptions against installer quotes and incentive claims.
FAQ
Common solar calculator questions
Where do I find monthly kWh on my bill?
Look for a line labeled kWh, energy use, or total usage for the billing period. Some bills show daily averages; multiply by days in the period if needed.
Can I use my dollar total instead of kWh?
Yes for early planning. SolarCalcNow can estimate kWh from bill amount and a state residential rate, but kWh is more accurate when fixed charges or tiered rates are large.
Does this page replace my utility rate plan documents?
No. Use it to collect the right numbers before running a calculator. Verify export credits, time-of-use periods, and net billing rules with your utility.