Bill Math

Start with the bill, not the headline.

Use this section to separate usage, rate-plan details, utility assumptions, proposal estimates, financing assumptions, and example calculations.

Educational examples are not universal results for your home. Keep examples separate from account-specific decisions.

What to check

If a bill claim sounds simple, ask what it depends on.

Recent usage history

Current rate-plan information

Utility charges that may remain after solar

Timing assumptions for production and usage

Ownership and financing assumptions

Source dates for program, utility, or rate information