Northern Rivers Home Battery Buyer’s Guide 2026: Sizing, Brands, Rebate, Backup and Quotes

Checked and updated by our licensed electricians: October 2026

Everything a Northern Rivers household needs to know before buying a home battery, written by the local electricians who install them: how to size it from your bills, Sigenergy and GoodWe in 8 and 9 kWh modules, exactly when the federal rebate steps down, what stays on in a blackout, where the battery is allowed to go (including near the coast), what your switchboard needs, how to compare quotes and what real local installs look like. Free, nothing to download, no details needed to read it.

1. What a home battery does, and does not do

A home battery stores electricity so you can use it later. With solar, that means the power your panels make at lunchtime runs the house at dinner and overnight instead of being sold to the grid for a few cents. With a backup-capable system it also keeps the house running when the grid goes down. What a battery does not do is make electricity: the energy has to come from your roof or the grid, which is why the size of your solar matters as much as the size of the battery.

Two numbers describe every battery. kWh (kilowatt-hours) is how much it stores, like the size of a water tank. kW (kilowatts) is how fast it can deliver power, like the width of the tap. You need enough of both: enough kWh to get through the evening and night, and enough kW to run what you switch on at the same time.

2. Why Northern Rivers homes buy batteries

Three reasons come up on nearly every call we take.

• Blackouts. Ex-Tropical Cyclone Alfred in March 2025 left tens of thousands of homes and businesses across the region without power, some for days, and the 2022 floods cut power to many homes too. A battery set up for backup keeps the fridge, lights, water pump and internet going, and on a sunny day the panels recharge it while the house runs.
• Evening power bills. Most households use most of their power after the sun has gone. Solar on its own cannot help with that; a battery shifts the day’s solar into the evening.
• Electric cars and electrification. An EV, an induction cooktop or a heat pump adds to evening use. A battery, and often more solar, is how the roof keeps up.

See how long a battery would run your own list of appliances with the blackout battery runtime calculator, and whether your roof makes enough for a car with the solar to charge my EV calculator.

3. Five questions to ask every installer

These are the questions that separate a well-designed battery from one sold off a catalogue. Ask them of everyone who quotes you, us included. Each one has an honest answer from us underneath.

1. Will you visit my home before you quote, or price it from a photo? A quote from a satellite photo cannot see your switchboard or the wall the battery will hang on. Consumer group CHOICE describes a second installer finding a switchboard upgrade that a photo-based quote had missed. Us: a face-to-face site visit before every install, where we check the battery position, the switchboard and that you and we are both happy before install day.
2. Who actually does the install, your own electricians or a subcontractor? Many companies sell the job and pass it on. Us: our own licensed electricians design and install every system. No subcontractors.
3. Is the switchboard work in the price, or an extra on the day? Adding a battery usually means safety-switch (RCBO) upgrades to meet current standards, and sometimes more. Us: checked on the site visit and priced up front, so there are no surprises on the day.
4. Is the battery designed around my actual usage, or just the size you want to sell? Good sizing looks at when you use power, not only how much. Us: we design the battery around your real usage from one or two recent bills, so you get the battery you need, not the one someone wants to sell you.
5. Which circuits stay on in a blackout, the whole house or only a few? Some batteries give no backup at all; others power only a few chosen circuits. Us: a typical install backs up the whole home, unless you choose to leave something out such as an EV charger.

The longer list, with licences, warranties and the deposit, is in how to choose a home battery installer.

4. The three starting points

Every battery design we do starts from one of three places, and your power bills tell us which.

• No solar yet. We size the solar and the battery together from your real consumption, so the panels can fill the battery every day and the battery covers the evening. This is the most common job for a new battery buyer.
• Solar, but not enough. We check whether your existing panels can cover the daytime and still charge a battery for the night. Often an older 3 to 5 kW system cannot, especially in winter, so we design the extra solar needed as part of the job.
• Solar that is already enough. If your roof covers the day and has spare to charge a battery for the night, it is a battery-only job. Many of our battery-only installs sit on roofs of 6.6 kW and more.

Not sure which you are? The is my solar battery-ready? checker gives a first answer in a minute, and how to read your power bill shows where the numbers sit on the bill.

5. Sizing: kWh, kW and modules

Batteries come in modules, so the sizes step: the GoodWe ESA uses 8 kWh modules (8, 16, 24, 32 or 40 kWh) and Sigenergy uses 9 kWh modules (9, 18, 27, 36 or 45 kWh). Most Northern Rivers homes land between 9 and 27 kWh. We size it in this order:

1. Cover the evening and night. The battery should comfortably carry what you use from late afternoon until the sun is back. A household using 20 kWh a day typically uses 10 to 12 kWh of it after dark.
2. Make sure the solar can fill it, in winter. A winter day in our region makes roughly 30 per cent less than the yearly average. If the roof cannot fill the battery in June, we design more panels, or a smaller battery.
3. Allow for blackouts. If backup matters, we allow for the appliances you want kept running and for how long.
4. Think about what is coming. An EV, a pool, working from home or a growing family all change the answer. Both brands let you add a module later.

Bigger is not always better. The federal rebate applies in full to the first 14 kWh of usable capacity, at a reduced rate from 14 to 28 kWh and at a much lower rate from 28 to 50 kWh. Every extra module costs about the same to buy but earns less rebate, and a battery that never empties overnight is capacity you paid for and do not use.

More in what size home battery do I need? and the 60-second battery quiz.

6. The batteries we install, and why

We offer two main price points so you can get the outcome you need without paying for more than you need.

• Sigenergy (premium). A modular all-in-one with 9 kWh battery modules stacked under a hybrid inverter, whole-home backup, a fast and clear app with a built-in AI helper, and an optional EV charger that works with the battery. We are a Sigenergy-approved installer. Sigenergy batteries.
• GoodWe ESA (mid-tier, very high quality). An all-in-one unit with 8 kWh modules, a strong warranty and GoodWe’s SEMS+ app. For many homes it does everything they need for less. GoodWe batteries.

We also install Sungrow, SolaX and Tesla batteries where they suit the home, with AIKO and Jinko panels. See the other battery brands we install. Every battery we install is on the Clean Energy Council’s approved list and is capable of joining a virtual power plant, which the federal rebate requires (joining one is your choice).

Warranties, in writing: 10 years on the battery, 10 years inverter replacement, 25 years panel performance, and a 25-year workmanship warranty on our own installation work. Equipment is covered by the manufacturer; our workmanship warranty covers the install itself.

7. The rebate, the step-down dates and the 0% loan

The federal Cheaper Home Batteries rebate is taken off your price at the point of sale; you do not apply to the government yourself. Its value is set by the install date:

Battery installed	Rebate factor
Now, until 31 December 2026	6.8
From 1 January 2027	5.7
From 1 July 2027	5.2

Solar panels earn STCs, which step down every January. We build both rebates into every design and do the paperwork. See what the steps mean for a given size with the battery rebate calculator, and who qualifies and how the rebate is claimed. The rebate needs an installer accredited by Solar Accreditation Australia (SAA); we are.

Finance. Eligible NSW homeowners (combined taxable household income of $210,000 or less) can apply for the NSW Home Energy Saver 0% interest loan of up to $15,000 for solar and batteries, over up to 10 years, through Brighte. Rebates come off first, then the loan covers the rest, and with us you pay the same price whether you use the loan or not. Deposit: 10 per cent with your own money, $0 with the loan. Eligibility criteria apply, subject to lender approval. How the NSW 0% loan works.

8. Blackout backup: whole home or essentials

Plain grid-connected solar switches off when the grid goes down, for the safety of the people fixing the lines. A battery system set up for backup separates your home from the grid, keeps the house running and lets the panels recharge the battery while the sun is up. Two choices matter:

• Whole-home backup keeps every circuit on. It is what a typical Sun Connect Solar install gives, unless you ask us to leave something out, such as an EV charger or a pool pump.
• Essential-circuits backup powers only the circuits you choose: fridge, lights, pump, internet. It suits homes with very heavy loads or a smaller battery.

Battery size decides how long you can run; the inverter’s kW decides how much you can run at once. A single-phase home battery system typically supplies about 5 to 10 kW at once, so during an outage the big items (oven, air conditioner, hot water) go one at a time. Ask any installer which circuits stay on, whether the solar recharges the battery in an outage, and to show you the backup circuits labelled and tested at handover.

Read whole-home vs essential-circuits backup and blackout backup batteries; try the blackout battery runtime calculator.

9. Where the battery can go, and the coast

The Australian standard for home battery installs, AS/NZS 5139, sets where a battery can and cannot go. A home battery must not be installed in a habitable room (bedrooms, living rooms, kitchens, studies), in a passageway or escape route, within 600 mm of an exit (in NSW that includes garage doors), within 600 mm sideways of or 900 mm below an opening window into a habitable room, in a ceiling or wall cavity, or where a car could hit it unless it is protected. The wall material matters too. Heat shortens a lithium battery’s life, so a shaded, ventilated spot beats a west-facing wall in full sun.

Near the coast. The makers add their own rules. Sigenergy, Sungrow and the SolaX X1-VAST manuals say install at least 500 m from the coast; GoodWe asks to be consulted before an outdoor install within 500 m and its Australian warranty excludes salt damage unless GoodWe approved the install in writing first, which we check at design time for beachfront homes. AIKO panels carry salt-mist certification and allow 50 to 500 m from the shore with corrosion-treated parts; Jinko allows 50 m minimum with connectors protected inside 500 m. We install the same way everywhere, to Australian standards, and choose the position and the equipment to suit the site.

Full detail: where can a home battery be installed? and solar and batteries near the coast.

10. Your switchboard

Adding a battery can change a house’s electrical set-up more than people expect. Current standards call for RCBO safety switches (a circuit breaker and safety switch in one) on the circuits involved, and older boards with ceramic fuses or a single safety switch usually need an upgrade before a battery can be connected compliantly. This is the item cheap quotes most often leave out and add on the day. We check the board on the site visit and the work is in the quote up front.

Read switchboard upgrades and RCBOs.

11. Adding a battery to existing solar

Nearly every grid-connected solar system can take a battery; the question is how. AC-coupled: the battery has its own inverter and sits alongside the one you have, which stays in service. Hybrid or all-in-one: one inverter handles solar and battery together and usually replaces your old inverter, which is what the Sigenergy and the GoodWe ESA do. If your inverter is 10 years old or more, replacing it with an all-in-one avoids paying twice; if it is young and your solar is a good size, AC-coupling can keep it. Homes with microinverters (Enphase and similar) are AC-coupled, because the micros stay on the roof. The design also decides whether your panels keep recharging the battery during an outage.

Get a first answer with the is my solar battery-ready? checker, then read can I add a battery to my old solar system? and adding a battery to existing solar.

12. How to compare quotes, and the red flags

Get two or three quotes from well-reviewed local installers who will visit your home, then compare them line by line, not by the bottom figure. Every quote should show the battery and inverter models and sizes, the panels if solar is included, what stays on in a blackout, the switchboard work, who does the install, the warranties, the rebate as a line taken off, the deposit and what is excluded. Anything missing, ask before you sign.

Our quote comparison checklist puts the 12 items on one screen you can tick through as you read each quote.

Red flags, from CHOICE and the SolarQuotes buyer guides: false deadlines and countdown timers, doorknockers and cold callers on commission, anything described as free or no net cost, mismatched or unknown brands, a company only registered since the rebate started, clauses that let the installer swap components, and nobody willing to visit before quoting.

13. Real Northern Rivers installs

These are completed jobs by our own electricians, each with its own case study. Towns and systems only; never names or addresses.

• Mullumbimby: Sigenergy 9 kWh battery with 6.7 kW of solar. a single module for a smaller household: cover the evening, keep the fridge and lights on in a storm. Read the case study.
• Pottsville: Sigenergy 8 kWh battery with 6.4 kW of AIKO solar. a coastal home where the install position and salt-air rules mattered as much as the size. Read the case study.
• Lennox Head: GoodWe ESA 16 kWh battery with 8.6 kW of Jinko solar. the mid-tier GoodWe route: two 8 kWh modules sized to the bills, solar big enough to fill them. Read the case study.
• The Channon: GoodWe ESA 16 kWh battery with 6.7 kW of Jinko solar. a hinterland home where blackout backup was the first reason to buy. Read the case study.
• Byron Bay: Sigenergy 16 kWh battery with 10.5 kW of AIKO solar. a premium system sized so the roof fills the battery through winter. Read the case study.
• East Ballina: Sigenergy 27 kWh battery with 8.6 kW of Jinko solar. three 9 kWh modules for a bigger evening load and a longer run in an outage. Read the case study.
• Tyalgum: GoodWe ESA 25 kWh battery with 6.7 kW of Jinko solar. three GoodWe modules in the Tweed Valley, where outages can last. Read the case study.
• Ocean Shores: Sigenergy 32 kWh battery with 13.3 kW of AIKO solar. a large family home: the solar was sized first, then the battery to match. Read the case study.
• Goonellabah: Sigenergy 24 kWh battery with 12.3 kW of Jinko solar. solar and battery designed together from the bills, on the Lismore side of the region. Read the case study.
• Mullumbimby hinterland: off-grid Sigenergy battery and solar with a backup generator. what a fully off-grid design looks like when there is no grid to fall back on. Read the case study.

More at recent installs and case studies, our install map by town and what homes in your postcode installed.

14. What happens after you say yes

1. Free energy assessment. Send one or two recent power bills; a short call with one of our electricians sizes the system from your real usage.
2. Proposal. A custom design with the rebates already taken off. You sign it online when you are ready.
3. Site visit. Battery position, switchboard, backup plan, and a check that you and we are both happy before install day.
4. Grid application and install. We handle the network paperwork and book the install, normally two to four weeks out. The install itself is usually one day, with our own electricians on site.
5. Connection, monitoring and sign-off. Grid connection typically follows within one to three weeks; we set up the app, lodge the rebate paperwork and do a sign-off call.

15. Questions we get asked

How much does a home battery cost in the Northern Rivers?

It depends on the size (8 or 9 kWh modules), the brand (Sigenergy premium, GoodWe mid-tier), whether solar is included and what your switchboard needs. Our solar and battery price calculator shows a typical range after the federal rebate in about a minute, and the exact figure comes after we have seen your power bills and your home. Our team does not talk price by text; pricing is gone through properly on a call.

What size home battery do I need?

Most Northern Rivers homes land between 9 and 27 kWh. The right size covers what you use from late afternoon until the sun is back, can be filled by your solar in winter, and allows for what you want kept running in a blackout. Batteries come in modules (GoodWe 8 kWh, Sigenergy 9 kWh), so you can add a module later. We size every battery from one or two of your recent power bills.

Is the federal battery rebate still available, and when does it step down?

Yes. The Cheaper Home Batteries rebate is taken off your price at the point of sale and is set by the install date. The current factor is 6.8; it steps down to 5.7 for installs from 1 January 2027 and to 5.2 from 1 July 2027. Solar STCs step down every January too. Our battery rebate calculator shows what each step means for a given battery size.

Can I add a battery to my existing solar?

Nearly always. Either the battery comes with its own inverter and sits alongside your existing one (AC-coupled), or a hybrid all-in-one such as the Sigenergy or GoodWe ESA replaces your old inverter. Which is better depends on the age and size of your inverter and what you want in a blackout. Use our battery-ready checker for a first answer, and we confirm it at the site visit.

Will my solar and battery work in a blackout?

Only if the system is set up for backup. Plain grid-connected solar switches off when the grid goes down. A backup-capable battery system separates your home from the grid, keeps the house running and lets the panels recharge the battery while the sun is up. A typical Sun Connect Solar install backs up the whole home unless you ask us to leave something out, such as an EV charger.

Sigenergy or GoodWe: which battery should I choose?

Both are excellent. Sigenergy is our premium option: 9 kWh modules, a fast app, an optional EV charger built into the same system. The GoodWe ESA is our mid-tier option: an all-in-one unit with 8 kWh modules and very high quality for the money. The right pick depends on your budget, your solar and whether an EV is coming. Our 60-second battery quiz gives a first steer.

Where can a home battery be installed?

Not in a habitable room, not within 600 mm of an exit, not under a window into a habitable room, and never where a car could hit it unless it is protected. The Australian standard AS/NZS 5139 sets the rules, and the makers add their own, including coastal clearances. We check the position on a face-to-face site visit before any install.

Do I have to pay a deposit, and is finance available?

Our deposit is 10 per cent when you pay with your own money and $0 when you use the NSW Home Energy Saver 0% interest loan (up to $15,000 over up to 10 years, through Brighte; rebates come off first; eligibility criteria apply, subject to lender approval). You pay the same price either way.

How long does the whole process take?

After a short call about your bills we send a proposal; once you go ahead we visit your home, handle the grid application and book the install, normally two to four weeks out depending on booked jobs. The install itself is usually a day, grid connection typically follows within one to three weeks, then we set up the monitoring app and do a sign-off call.

Who should I get battery quotes from?

Two or three well-reviewed local installers who will visit your home before quoting. Compare the quotes line by line with our quote comparison checklist: the battery and inverter models and sizes, what stays on in a blackout, the switchboard work, who does the install, the warranties and the rebate line. Be wary of false deadlines, cold callers and anything described as free.

Sources

Australian Government (energy.gov.au) Cheaper Home Batteries Program and Solar Consumer Guide; Clean Energy Regulator rebate factors; AS/NZS 5139:2019 as summarised by the Electrical Regulatory Authorities Council; the Sigenergy, GoodWe, Sungrow, SolaX, AIKO and Jinko installation manuals and warranty documents (coastal rules); CHOICE, “7 solar mistakes to avoid” and “Bad battery deals: red flags”; SolarQuotes, “10 questions you must ask before buying solar” and its battery installation guide; NSW Government Home Energy Saver program page. Checked October 2026.

Planning an EV as well as the battery? Read the EV buyer’s guide for home charging and solar: which cars charge at 7, 11 or 22 kW, which have V2L, and how V2H and V2G fit with a home battery.

Hot water next? The hot water heat pump buyer’s guide and calculator covers brands, noise, sizing, the 2026 rebates and running one on solar with a battery.

Going all-electric? The getting off gas guide and induction cooktop switchboard checker shows how much load induction and a heat pump add and why the battery, not just the solar, carries the evening cooking.

Thinking about Amber or a VPP once the battery is in? The Amber Electric with a home battery and VPPs in NSW guide covers compatibility for Sigenergy and GoodWe, the risks and the NSW VPP payment.

Buying mainly for blackouts? Read generator or home battery for Northern Rivers blackouts before you decide: it compares the two honestly on fuel, noise, switch-over and safety.

A battery and a time-of-use tariff go together: our smart meter, controlled load and time-of-use guide shows Essential Energy’s peak windows and how the battery rides through them.

Building rather than retrofitting? The BASIX and new build guide explains how the battery wall, the switchboard and the phase are designed in from the plans.

Buying a battery to run the air conditioning at night? Read running air conditioning on solar and a battery first: pre-cooling on solar can be worth a battery module.

If you have a pool, read running your pool on solar: the pump and heater belong on the panels at midday, not on the battery at night.

More from Sun Connect Solar

• All our free tools for solar and battery buyers
• Home battery installation in the Northern Rivers
• Solar and battery price calculator
• Is a home battery worth it?
• How to choose a home battery installer
• Frequently asked questions