A smaller upfront payment is not a smaller total cost.

Check which ACT pathway applies

The Sustainable Household Scheme currently describes general loans of $2,000–$20,000 at 3% interest, repayable over up to 10 years. Batteries are among the eligible products. Previous participants and households that applied or received approval before 1 July 2026 have a $15,000 lifetime limit. Eligibility and credit assessment still apply. Read the current ACT scheme terms.

The Home Energy Support Program has a separate concession pathway, including eligible solar and zero-interest finance. Do not use older descriptions of universal interest-free solar loans as the basis for a new application. Have the scheme provider confirm your product, eligibility and remaining borrowing allowance.

What a $10,000 loan could mean each month

This is a mathematical illustration, not a lender quote. Assume $10,000 borrowed for 10 years at a constant nominal annual rate of 3%, with 120 equal end-of-month repayments. Interest is calculated monthly at 3% ÷ 12. There are no fees, missed payments or early repayments.

The monthly payment is about $96.56. Total repayments are about $11,587, including roughly $1,587 interest. Totals use the unrounded payment before rounding to whole dollars; an actual lender schedule may use a different payment frequency or interest calculation.

To reproduce it: payment = P × r ÷ [1 − (1 + r)⁻ⁿ], with P = 10,000, r = 0.03 ÷ 12 and n = 120. Use the lender’s actual schedule when comparing a real quote.

Would the bill reduction cover the repayment?

The illustration requires about $1,159 a year in repayments. Compare three invented annual bill reductions:

• $600 reduction: about $559 more leaves the household budget each year during repayment.
• $1,000 reduction: about $159 more leaves the budget.
• $1,400 reduction: about $241 remains after the loan repayments.

These are cash-flow comparisons before maintenance or other costs, not expected battery savings. A positive result does not prove a good lifetime return, and a negative one does not measure the value you place on backup. Bill reductions can also arrive unevenly through the year while repayments continue on schedule.

Ask for a lower-savings case as well as the salesperson’s main estimate. Keep future tariff changes, battery performance and repairs visible rather than assuming today’s saving lasts unchanged for the loan term.

Use a funding ledger with four separate amounts

1. Installed price: equipment, labour and known extras before incentives.
2. Confirmed discounts or rebates: each named separately, with who receives it and when.
3. Your cash contribution: money paid from your own funds.
4. Amount borrowed: the remaining principal, followed by the repayment schedule and total interest.

Borrowing pays the supplier; it does not reduce the installed price. If a quote labels both a loan and a rebate as “support”, ask for them to be separated before comparing another offer. Check that a discount has not been subtracted twice, once in the advertised price and again in the funding summary.

Compare the term without changing the system

Request the same equipment quote with different available loan terms. A longer term can lower regular repayments while increasing total interest. Compare total repayments, the payment dates and any fees rather than choosing only the smallest monthly figure.

Keep other planned upgrades in view: using borrowing allowance on a battery may leave less for heating, hot water or insulation. Assess each project on its own cost and household benefit before bundling them.

Prepare a battery quote brief to check participating installer availability. Ask for the cash price first, then consider funding separately. For an initial capacity assessment, use the battery size guide.

Solvetted may receive a referral fee. This guide illustrates costs and cash flow; it does not assess borrowing eligibility, affordability or suitability for your household. The figures are not measured customer outcomes or a loan offer.