Making Solar More Accessible: A Guide to Green Loans in New Zealand
May 22, 2025
If you’ve been thinking about solar, you’ve probably heard a lot about batteries lately. And with good reason. A home battery stores the solar power you generate during the day so you can use it later when power from the grid is at its priciest—usually in the evenings. That means smaller power bills, more independence from the big retailers, and a smarter way to use your own clean energy.
If your keen to have a look at the battery products we supply and install check out our battery products page.
Why Home Batteries Are a Game-Changer
Here in New Zealand, most retailers now run on time-of-use (TOU) pricing. Power is cheap when demand is low—overnight or in the middle of the day—but it spikes during the morning and evening peaks. That’s exactly when solar panels aren’t producing. Without a battery, you end up selling your excess solar for a low rate (often just 8–12c/kWh) and then buying it back at 30–50c/kWh once the sun goes down.
A battery flips that equation. It stores your surplus solar so you can run your home on your own power when prices rise. It also means you can do everyday stuff like run the dishwasher overnight, charge the EV while you sleep, or keep the heater going in the evenings without watching your power bill spike. Beyond saving money, batteries make the grid more stable, cut back on fossil fuels, and help us move toward a cleaner, more resilient energy future.
Big Changes Coming for Solar + Battery Households
From mid-2026, two major changes will reshape how Kiwi households with solar interact with the grid:
1. Time-of-use (TOU) pricing becomes standard.
All large electricity retailers will have to offer at least one TOU plan. That means cheaper rates in off-peak windows (overnight or midday) and higher rates at peak times (weekday mornings and evenings). For solar homes, this is where batteries really shine—you can store your solar to cover the expensive hours, or even charge your battery overnight on cheap rates and use it when power prices spike. It also gives you more freedom to schedule your daily energy use—like running the washing machine while you sleep or topping up your EV after dinner.
2. Fairer solar export rates are coming.
From July 2026, major retailers will be required to pay fairer buy-back rates for exported solar. Low rates (often 8–12c/kWh) have long frustrated solar owners, but the new rules aim to reward households properly for supporting the grid. Some retailers are already paying up to 40c/kWh at peak times. Once fair rates are standard, the financial case for solar—and especially solar paired with batteries—gets even stronger.
Put simply, these changes mean shorter payback periods, better returns, and more control over how you use your power.
Key Factors When Choosing a Battery
If you’re looking at adding a battery (or starting fresh with a solar + battery system), here are a few things to weigh up:
- Storage Capacity (kWh): Most homes are getting batteries between 5–27 kWh. The right size depends on how much power you use in the evenings.
- Power Output: Higher output lets you run more appliances at once.
- Cycle Life & Warranty: Look for strong warranties (10 years or more) and thousands of charge/discharge cycles.
- Brand & Support: Go with a reputable brand that offers solid support here in NZ.
- Compatibility: Some batteries need a hybrid inverter, while others are all-in-one.
- Automatic Blackout Prep — some batteries, like Tesla Powerwall, automatically top themselves up when severe weather is forecast, so you have maximum backup power.
At Garden City Solar, we’ve got a range to suit different Kiwi households: the Fronius Reserva, Enphase micro-battery systems, the popular Tesla Powerwall, and Sigenergy with advanced energy management features.
Ready to Take Control of Your Power?
More and more Kiwi families are adding batteries—not just to save on power bills, but to stay powered during outages and shrink their carbon footprint. With fairer pricing and export rules coming into play, there’s never been a better time to look at solar plus storage. A battery also lets you fit your energy use around everyday life—charge the EV while you sleep, or keep the kids’ bedroom heater on without stressing over the power bill.
👉 Check out our battery products page. to explore the options and see which system is the right fit for your home.