Home Solar & Battery Basics: 10 Myths Worth Clearing Up

If home solar and batteries have left you more confused than when you started, you're not the problem. Rebate changes, prices are hard to pin down, and the rules aren't always clear. We are an energy company, so yes, we sell Solar & Batteries, but this isn't a sales pitch. It's ten common battery myths explained in plain language.

Myth 1: You need more than $10,000 upfront to start

This stops more people than anything, and it's based on the sticker price, not what you pay. 

The federal rebate (the Cheaper Home Batteries Program) takes around 30% off the upfront cost of an eligible battery, and you don't pay full price and claim it back. Your installer applies the discount at the point of sale, so your quote is already lower. Prices vary by brand and size, and some states add more on top, so the real starting figure is usually smaller than you expect. 

Myth 2: The rebate is the same wherever you live

Everyone can access the federal rebate, but the extra support on top depends on your state, and these programs change often. 

In NSW, the old standalone install rebate was folded into the federal discount. The state now pays up to $1,500 for connecting your battery to a virtual power plant, and the new Home Energy Saver program adds interest-free loans of up to $15,000, plus discounts of up to $4,000 for lower-income households, to help cover solar, batteries and other upgrades, all of which can be stacked on top of the federal discount. 

Queensland and Victoria have no separate state rebate right now, so the federal discount is the main support. South Australia is federal-only since its earlier scheme closed, Western Australia runs its own scheme usually tied to a virtual power plant, and the ACT offers interest-free loans rather than cash. Because details shift year to year, check what rebates apply for your own postcode, when you buy.

Myth 3: A battery drops your bill to zero

Zero bill? It is rare, so be wary of anyone who promises it.

A battery can take a serious chunk out of your bill by storing cheap or free daytime solar for use at night instead of buying expensive grid power, and most people see this on their very next bill. But your savings depend on your usage, system size and the season since winter means less sun. Lower bills start straight away, but paying back the upfront cost takes longer. A well-sized battery often saves around $1,000 to $1,500 a year (a guide, not a promise), and with the rebate, payback now commonly lands around seven to ten years, and it's shorter if you use a lot of power in the evenings, connect to a virtual power plant, or prices rise. 

A battery usually keeps working well beyond payback, so those later savings are yours, along with a buffer against rising prices and more control over your energy.

Myth 4: Bigger batteries are always better

That tempts people to grab the biggest battery before the rebate shrinks. But a bigger battery only saves money if you fill it each day.

The rebate changed on 1 May 2026: the amount per kWh dropped about 19% (the rate moved from 8.4 to 6.8). It's now weighted toward normal household sizes (full rebate up to around 14 kWh of usable storage, less above that, capped at 50 kWh), and it steps down again from 2027. A typical family on a 6.6kW system using 16 to 20 kWh a day is usually well covered by a 10 to 13 kWh battery; a unit of 20 kWh or more would sit half empty most nights, which is overspending, not saving. 

The right size depends on how much power you use and when, plus where your life is heading: a growing family, going all-electric, an EV down the track, more time at home. A good installer sizes the battery to your home and your plans, not to the biggest box on the shelf.

Myth 5: You need three-phase power to add a battery

Three-phase is necessary? Not always. 

Plenty of ordinary single-phase homes run batteries happily. Single phase is one supply line into your home, three phase is three; single phase is standard in most Australian homes and fine for a battery. Three phase tends to appear in larger or newer homes, rural blocks, or homes with heavy loads like ducted air conditioning, a pool, or an EV charger. Which you have depends partly on your wiring and switchboard and partly on what the network has run down your street, and upgrading can be costly or impossible. 

The good news is you almost never need to. When an installer visits, they'll check your switchboard and match a system to what you have. If you've been putting this off assuming your house isn't set up for it, it almost certainly is.

You'd assume a home battery would keep things running, but it doesn't happen automatically.

Myth 6: You order online and it installs itself

You can research and compare online, which is a smart place to start, but a home battery isn't a plug-in gadget.

It's a permanent part of your home's electrical system, more like a bathroom renovation than an online purchase. To get the rebate, the work must be done or supervised on site by an installer accredited by Solar Accreditation Australia, using products on the Clean Energy Council's approved list. 

A real site visit matters too: a place that looks straightforward on a satellite map may have nowhere safe and shaded to mount the battery, a switchboard that needs work, or a tree next door shading the roof half the day. Expect someone to check your roof, switchboard and layout in person and sign off that it's safe. That assessment protects you, your home, and your family.

Myth 7: A battery automatically keeps the power on in a blackout

You'd assume a home battery would keep things running, but it doesn't happen automatically.

When ex-Tropical Cyclone Alfred hit in early 2025, more than 300,000 homes across southeast Queensland and northern NSW lost power, and an outage means spoiled food, cold showers and a phone you can't charge. 

For safety, grid-connected systems must shut down during a blackout so crews can repair lines safely. A battery only powers your home through an outage if it has a backup (or “islanding”) function set up for it, which can need extra hardware like a backup gateway. If keeping the power on matters, say for medical equipment or a storm-prone area, make this clear up front, and ask your installer exactly what's included, which appliances the backup runs, and for how long. It's far easier to build this in at the start.

Myth 8: Getting a battery means switching retailers

It doesn't. Your battery and the rebate work no matter what energy retailer you're with. 

Still, it's worth reviewing your energy plan, because the maths has changed: feed-in tariffs for daytime solar have dropped significantly, so chasing the best rate matters less than it used to. What counts now is how much you save using your own stored power at night, plus what a battery-friendly plan or virtual power plant pays on top. A virtual power plant lets your battery sell a little stored power back at peak times for ongoing payments; most rebate-eligible batteries are already set up for it, but plans and payments differ, so weigh it up before you buy. 

The battery, install, plan and VPP can come from different places (some companies, Nectr included, we can handle the lot under one roof), but switching is optional, and the right plan can make a real difference to what your battery is worth.

Myth 9: Batteries will be cheaper if you wait

Tech gets cheaper, so it feels smart to wait, and prices have drifted down. For batteries too?

But the rebate is designed to shrink as prices fall, stepping down at intervals through to 2030. The federal battery rebate already dropped 19% on 1 May 2026 and will continue to reduce from there, so cheaper hardware and a smaller discount tend to cancel each other out. Meanwhile, every month you hold off is another month paying full price for evening grid power you don't get back. 

The better question isn't how much cheaper a battery might be next year, but how much it could save you this year.

Myth 10: Power prices will drop anyway

Prices are hard to predict and move around a lot: wholesale prices swing by season, some regions see small drops, and price caps are revised yearly. 

But hope isn't a plan. The broader cost of living keeps climbing and power bills have stayed high alongside it; even when wholesale prices dip, that relief doesn't always reach what you pay. The savings from solar and battery come mostly from using your own power instead of buying it, and that holds whichever way prices move. If bills rise, you're shielded from a chunk of it; if they fall, you still come out ahead. Rather than betting on prices, a battery lets you take charge of your own bills.

Where to start

You're already ahead of most people. A simple, no-pressure way to begin:

• Look up your usage. Grab a recent bill and note how much power you use and when. Evening-heavy homes benefit most.

• Check your eligibility. Start with the official Cheaper Home Batteries Program page, then look up any state rebate.

• Ask for options, not just a price. Request two or three designs at different sizes and types, each priced. Make sure whoever you talk to is accredited by Solar Accreditation Australia and using products approved by the Clean Energy Council.

• Decide what matters: lower bills, blackout backup, or independence. Tell installers your priorities, so they quote the right thing, not the biggest thing.

You don't have to figure it all out today. Let’s have a chat. We will walk you through the process, step by step.