Updated September 2026
Cash vs Green Loans for Solar
Compare paying cash with using a low-rate green home-loan top-up. The right structure depends on repayments, the promotional term and how much cash you want to keep available.
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Cash vs Green LoansCompare total cost and cash flow
Finance limit / structureUse your actual solar quote
Term / rate afterModel the full promotional period
ExampleFor a $15,000 system, paying cash avoids finance cost. A 0% five-year loan would require about $250 per month; a 1% three-year loan is about $423 per month. Also check what rate applies after any promotional period.
EligibilityBank products are subject to lending criteria. This comparison is general information only and is not financial advice.
Bank
Headline offer
Limit
Key point
Westpac
0% for 5 years
Up to $50,000
Designed to be repaid in full within five years; solar systems and batteries are eligible.
ANZ
1% p.a. fixed for 3 years
$3,000–$80,000
Good Energy Home Loan; current EECA comparison lists an existing ANZ home loan requirement.
ASB
1% p.a. fixed for 3 years
Up to $80,000
Better Homes Top Up; solar panels, batteries and inverters are eligible; minimum equity criteria apply.
BNZ
1% p.a. fixed for 3 years
Up to $80,000
Better Future top-up; renewable energy including panels, batteries and inverters is eligible.
Kiwibank
Variable home-loan rate
Product-specific
For eligible systems over $5,000, Kiwibank says it can contribute up to $2,000 over four years; SEANZ installer requirement applies.
Rates, limits and eligibility can change. This comparison is general information, not financial advice. Confirm current terms with the bank before applying. Source checks: bank product pages and EECA, 24 September 2026.
What matters beyond the headline rate
Compare the loan and the solar system together.
Low-rate periodCheck what happens when the promotional period ends and whether you intend to clear the balance before then.
Borrowing limitBattery storage, switchboard work, EV charging and hot-water upgrades can change the total project value.
Equity & eligibilityMost products are home-loan top-ups and have lending, equity and property requirements.
Quote requirementsSeveral banks require a valid quote or invoice from a qualified installer before funds are released.
Make the finance useful
Get the system designed first, then take a real number to your bank.
Revolve can model the property in Aurora, prepare the proposed equipment and scope, then give you a solar quote you can use when discussing finance with your lender.