Bank Mortgage Top-Ups – Making Solar, Ventilation, Heat Pumps & EV Charging More Accessible in Christchurch

Vicky Keatley • August 22, 2025

Bank Mortgage Top-Ups

Making Solar, Ventilation, Heat Pumps & EV Charging More Accessible in Christchurch

House with solar panels, heat pump outdoor units and electric car

As winter fades and spring arrives in Christchurch, it’s the perfect time to think about upgrading your home’s energy systems. Whether you want to keep warm on cooler nights or cool down efficiently during the upcoming summer, New Zealand’s major banks make it easier than ever with low or no interest mortgage top-up loans. These loans can help fund solar panels, heat pumps, ventilation systems, and EV chargers—improving comfort while cutting energy bills all year round.

Why Consider a Mortgage Top-Up for Home Upgrades?

  • Affordable Finance: Borrow up to $80,000 at 1% p.a. (ANZ, BNZ, ASB) or up to $50,000 at 0% p.a. (Westpac) for 3-5 years to upgrade your home*
  • Increase Comfort & Health: Install efficient heat pumps and ventilation to enjoy a warmer, drier home and better indoor air quality
  • Save Energy, Save Money: Solar panels reduce ongoing electricity costs, help the environment, and add value to your property
  • Futureproof Your Lifestyle: Electric vehicle ownership is growing fast, adding an EV charger now increases home value and supports greener transport

What You Can Upgrade With Bank Top-Up Loans?

Most major NZ banks include these eligible items:


  • Solar power systems & batteries
  • Heat pumps/air conditioning
  • Home ventilation systems
  • EV chargers
  • Insulation & double glazing
  • Rainwater tanks and more

Bank Mortgage Top-Up Offers at a Glance

Bank Amount & Rate Eligible Upgrades
ANZ Up to $80,000 at 1% p.a. for 3 years Solar, ventilation, heat pumps, EV chargers and more
BNZ Up to $80,000 at 1% p.a. for 3 years Solar power, batteries, ventilation, heat pumps, EV chargers
Westpac Up to $50,000 at 0% p.a. for 5 years Solar, heat pumps, ventilation, EV chargers, insulation
ASB Up to $80,000 at 1% p.a. for 3 years Solar, ventilation, heat pumps, EV chargers, insulation
  • You must have an eligible home loan or be willing to transfer your mortgage.
  • You’ll usually need at least 20% equity in your home.
  • Apply by getting a quote from your supplier (such as Christchurch Electrical) and submitting it to your bank for approval

* Banks differ in their lending criteria and product details, so check specific eligibility requirements and current available offers. Click bank to find out more information. Information correct at time of publishing.

Christchurch’s Partner for Smart, Energy-Efficient Upgrades

Christchurch Electrical specialises in:



We help you prepare the quotes you need for your bank application and deliver solutions that are eligible under these bank schemes.

Ready to Futureproof Your Christchurch Home?

Spring is the ideal season to invest in your home’s comfort and efficiency. With winter behind us, now’s the time to upgrade your solar, heat pumps, ventilation, or EV charger with affordable finance from major banks. Stay warm on cooler nights and enjoy efficient cooling through summer, all while lowering your energy bills.


Contact   Christchurch Electrical, 03 366 1718 for your no-obligation quote today!

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