Path-Q Solar

How much financial value is lost when solar production does not match my highest-value electricity use?

Answer

The lost value is the difference between the value of electricity used directly or offset during high-cost periods and the value received when excess production is exported or credited at a lower rate. It cannot be quantified from annual solar production alone.

Key points

  • A kilowatt-hour may have different value depending on when it offsets consumption, is exported, or reduces a demand charge.
  • The calculation requires hourly production and load data plus the applicable billing and export rules.
  • Storage, load shifting, or a different array orientation may reduce timing-related value loss.

What it depends on

  • Hourly household consumption and solar production
  • Energy, demand, fixed, and export charges
  • Seasonal rate periods and credit expiration or carry-forward terms
  • Battery efficiency and operating strategy
  • Ability to shift flexible loads

Risks and trade-offs

  • A larger array may produce more energy but not proportionally more bill value.
  • Storage can increase self-use but introduces equipment cost, losses, degradation, and maintenance.
  • Annual averages can hide valuable short peaks or low-value export periods.

Information you may need

  • Interval load data and proposed hourly production profile
  • Complete current rate and export terms
  • Demand-charge calculation, if applicable
  • Battery and load-shifting assumptions

Your next step

What to do next

Ask for an hourly bill simulation that separately reports direct use, avoided purchases, exports, credits, and any demand-charge effects.

Path-Q

Find the right next step

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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.

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