Time-of-Use Rates & Solar Savings
Published 2026-02-20 · Updated 2026-07-07 · MySunROI Research Team
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Time-of-use (TOU) rates charge more during peak hours (often 4–9 PM). Solar without batteries offsets daytime use; batteries shift solar to peak — valuable under TOU plans.
How TOU works
Peak rates may be 2–3× off-peak. Solar production peaks midday — aligns well before evening peak.
Batteries under TOU
Store midday solar, discharge during peak. Improves ROI in CA, AZ, and other TOU markets.
Solar costs by state
Frequently Asked Questions
Should I switch to TOU with solar?
Often yes — solar offsets expensive peak imports when paired with storage or load shifting.