Path-Q Solar

How should I compare a solar loan with paying cash for the same system?

Answer

Compare the cash price with the loan's total repayment and evaluate what your retained cash could earn or protect against elsewhere. Cash usually avoids interest and lender fees, while a loan preserves liquidity but may cost more overall and add payment or sale-related risk.

Key points

  • Use the same system scope, expected production, and operating assumptions for both options.
  • Compare total loan payments, origination fees, dealer charges, required deposits, and any prepayment conditions with the cash price.
  • Consider the opportunity cost of using cash and the value of keeping an emergency reserve.
  • Assess whether the loan changes eligibility, ownership, warranties, or transfer requirements.

What it depends on

  • Cash purchase price
  • Annual percentage rate, term, fees, and payment schedule
  • Expected investment return on retained cash
  • Household liquidity and risk tolerance
  • Potential early repayment or home sale

Risks and trade-offs

  • Financing can preserve liquidity but reduce total return through interest.
  • Cash payment can create financial strain if it depletes reserves.
  • A low advertised payment may reflect a longer term or costs embedded in the system price.

Information you may need

  • Written cash price and financed price
  • Full loan disclosure and amortization schedule
  • Any incentives or credits and their timing
  • Your reserve needs and alternative use of cash

Your next step

What to do next

Calculate total nominal cost and present-value cost for cash and loan options, then test the comparison under early payoff and home-sale scenarios.

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