Most major banks offer zero or very low interest loans to help with upgrading your home or personal transport to more energy efficient options. 

How a loan might help

Shifting to more efficient electric appliances and technology is one of the easiest ways to lower your home energy costs. 

With a home energy loan, you could cut those costs sooner, saving your household more on energy over time. 

As with all big financial decisions, it’s good to get professional advice to help you weigh up the benefits, risks and costs.

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What home energy loans can be used for

Each bank has its own products and criteria, but looking across the offerings from most of New Zealand’s big banks, it may be possible to get a home energy loan to pay for things like:

  • efficient electric appliances — things like a hot water heat pump or an induction cooktop
  • insulation — underfloor, ceiling or walls, and double or triple glazing for windows
  • moisture control — a ventilation system, extractor fan, ground water barrier, or waterproofing for walls and foundations
  • transport options — an electric bike, electric vehicle (EV), hybrid or plug-in hybrid car, or smart EV charger
  • renewable energy — solar panels, batteries and inverters, or a solar hot water system.

How home energy loans work

A home energy loan is usually added to a mortgage as a top up. Most major banks offer an interest rate from 0% to 1%. The amount you can borrow and how long you get to repay a home energy loan varies by bank.

Things to be aware of

If you don’t pay back a home energy loan within the agreed time, the interest rate will likely rise to match your home loan rate, with regular repayments applying. This will increase your total mortgage payments, so it’s best to pay off a home energy loan within the low- or no-interest period.

Ensure you read all loan terms before applying, so you know what is and isn’t included, and get in touch with your bank if you’re unsure about anything.

Current home energy loans in New Zealand

These banks have provided information to us about home energy loans they offer to their customers (as at June 2026). Lending eligibility criteria, terms and conditions apply.

  • ANZ Good Energy Home Loan

    • 1% interest per year, fixed for 3 years
    • Borrow $3,000 to $80,000
    • Reverts to standard floating interest rate after 3 years
    • Requires existing ANZ home loan

    View details at ANZ(external link)

  • ASB Better Homes Top Up

    • 1% interest per year, fixed for 3 years
    • Borrow up to $80,000
    • Reverts to standard variable rate after 3 years
    • Requires existing ASB home loan

    View details at ASB(external link)

  • BNZ Better Future Home Loan Top Up

    • 1% interest per year, fixed for up to 3 years
    • Borrow up to $80,000
    • Reverts to standard home loan interest rates at the end of the fixed term
    • Requires existing BNZ home loan

    View details at BNZ(external link)

  • Westpac Greater Choices Home Loan

    • 0% interest for 5 years
    • Borrow up to $50,000
    • Fully repaid over 5 years
    • Requires existing Westpac home loan

    View details at Westpac(external link)

For a comparison of loan options, view MoneyHub’s home loan top-ups(external link).

Personal loans

If you’re looking to buy an EV or hybrid, Westpac offers an unsecured EV personal loan of up to $50,000 at an interest rate of 7.99% per year (as at June 2026).

View details at Westpac(external link)

Energy-saving guides

Whether you get a green loan or not, these guides will help you to weigh up options and plan future purchases.

  • Is solar right for your home?

    Solar has come a long way and now offers great cost savings for most homes in New Zealand. Find out if solar is right for you.

  • Compare different EV options

    Not all EVs are the same. Compare battery electric, plug-in hybrid and standard hybrid vehicles to see which option best suits your travel and charging needs.

  • Plan your home energy upgrades

    Find opportunities to save by investing in key home appliances and technology, and making a plan for how you use energy in your home.