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Battery Replacement Budget Planner

Future replacement cost at a battery price trend, the shortfall against savings, and the monthly reserve that closes it.

Inputs

Inputs and assumptions

kWh to replace.

Installed dollars per kWh.

Years before replacement is due.

Annual battery price change.

Result

Future replacement cost
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Save per month
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Replacement at today prices
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What to check

  • Replacement year: warranted years and warranted throughput, whichever arrives first.
  • Installed cost per kWh from a current quote, including labor and any panel or wiring work.
  • Price trend: battery $/kWh has generally fallen, so a negative annual rate is often more realistic than a positive one.
  • Whether your warranty includes labor or only the battery hardware.
  • Reserve already set aside and where it is held; a sinking fund is only useful if it is not spent elsewhere.

Related calculators

Straight-line budget projection at a constant price trend. It is not an investment projection or a warranty valuation. Actual replacement cost depends on future equipment prices, incentive law at that time, and whether a panel or inverter upgrade is also required.

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