Path-Q Solar

How should a home buyer compare the remaining solar loan payments with bill savings estimated from verified utility history and an appropriate no-solar baseline?

Answer

Compare the loan's remaining cash payments with the incremental bill savings that the system is reasonably expected to produce relative to a no-solar baseline for the same home and usage. Include degradation, maintenance, insurance, replacement, rate uncertainty, and the buyer's holding period.

Key points

  • Obtain the lender's exact payment schedule, payoff amount, interest, fees, and transfer terms.
  • Use actual utility bills and production data, normalized for occupancy, weather, and unusual consumption.
  • Construct a no-solar baseline using comparable usage and the applicable bill structure rather than assuming every historical bill was avoidable.
  • Calculate annual and cumulative net cash flow under conservative, base, and adverse scenarios.

What it depends on

  • Loan terms and transfer or payoff requirements
  • Verified system production and utility history
  • Buyer consumption, expected occupancy, and holding period
  • Utility pricing and bill structure

Risks and trade-offs

  • Loan payments are contractual while bill savings are uncertain.
  • Historical savings may reflect different occupants or utility conditions.
  • A system can have positive long-term value but negative cash flow during the buyer's expected ownership period.

Information you may need

  • Loan statement and payoff or assumption documents
  • Utility bills and monitoring records
  • System inspection, warranties, and expected replacement costs
  • Buyer usage forecast and comparable no-solar bills

Your next step

What to do next

Build a year-by-year net-cash-flow comparison using verified documents and conservative savings assumptions before agreeing to assume the loan.

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

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