09/03/2026
Thinking about switching to Ultra-Low Overnight? Read this first.
Without a battery, ULO's on-peak rate (39.1¢/kWh) is actually higher than what most homes pay on Time-of-Use (20.3¢/kWh). Switching alone can raise your bill, not lower it.
A battery is what flips the math: it covers the expensive hours automatically, so you get ULO's 3.9¢ overnight rate without ever paying the 39.1¢ peak.
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