Powerstack main unit
The base module every system starts with
Wall-fixed and stacked; the sub-units bolt beneath it as one column.
Australia-wide
Energizer battery installers in Australia
Get matched with top solar companies in Australia
- Energizer Powerstack builds your battery capacity with modules in a single column
- Unlock up to $7,000 in federal solar + battery rebates*
- Compare quotes from vetted installers, with Energizer experience where available
Energizer
What could an Energizer battery save your home?
*For eligible combined solar and battery installations before January 2027. Battery-only rebates vary with usable capacity. Your installer confirms eligibility and amount.
✓ Up to 3 vetted installers
✓ Free to compare, no obligation
✓ Your chosen battery, your quote request
Meet Energizer A stackable home battery under the Energizer name, backed in Australia by a Melbourne company.
- Backed by a Melbourne company
In Australia the Energizer name is licensed to 8 Star Energy, a Melbourne company that provides the Powerstack warranty.
- Add modules whenever you like
Energizer Solar says battery modules can be added to a Powerstack at any time, so storage can grow with the household.
New modules work to the same depth of discharge as the older ones in the stack.
- Works with the solar you have
Powerstack can store spare power from an existing third-party solar inverter through AC coupling, Energizer Solar says.
It needs an extra meter to read your existing solar, and the battery itself pairs only with Energizer's own hybrid inverter.
- 10 years of cover, kept online
8 Star Energy's Powerstack warranty runs 120 months from installation while the system stays registered and connected for remote monitoring.
A system left unregistered or offline can have its warranty cut to 5 years, so keep it online.
The company behind it
Energizer Solar uses the Energizer name under licence; in Australia that licence sits with Melbourne's 8 Star Energy.
Licensed brand
Energizer is a trademark of Energizer Brands, LLC, used under licence by 8 Star Energy Pty Ltd.
Licensing model
Energizer Solar says it partners with solar manufacturers that sell products under the Energizer name.
Melbourne warrantor
8 Star Energy, an Australian company on Collins Street, Melbourne, provides the Powerstack warranty.
Want an Energizer battery on your home?
Get my Energizer quotesCompare up to 3 vetted installers. Free, no obligation.
We pick them, nobody bids
Request a match with up to 3 approved installers. Current availability, campaign geography and brand suitability are checked for your enquiry.
Check the installation credentials
Ask each installer for their workmanship warranty, trading history and current brand credentials before you decide.
Rebates at quote
The federal Cheaper Home Batteries discount — roughly a quarter off installed cost — plus your state layer, applied upfront at quote.
Find Energizer installers near you.
Each state page lists its capital and regional centres, the battery rebate stack for that state, and the installers we match you with there. Not listed? Matching runs on postcode, so enter yours anyway.
- New South Wales — 13 locations
- Victoria — 8 locations
- Queensland — 11 locations
- Western Australia — 3 locations
- South Australia — 1 location
- Tasmania — 2 locations
- Northern Territory — 2 locations
- Australian Capital Territory — 1 location
Is Energizer right for your home? Fit and warranty checks
A good fit if…
- Budget-led households building solar and battery together who want a simple stacked system
- Homes with a permanently reliable internet connection, which the warranty terms effectively require
- Sheltered inland sites away from the salt exposure owners have linked to corrosion complaints
- Buyers who will read who actually provides the warranty and are comfortable with an Australian licensee behind it
Consider the limitations
- You assumed the global brand on the box carries the warranty — in Australia the licensee does
- You want to keep an existing inverter, since the battery runs only on Energizer Solar hybrids
- Your site is coastal or exposed and you do not want to manage a corrosion risk owners have reported
- Your internet connection drops out often enough that a connectivity condition on the warranty is a real risk
- You want a deep, consistently positive body of owner reviews behind a long commitment
The Energizer range
Powerstack sub-units
Identical modules added to the stack
Capacity is a count of the same module, so the range is one product at different heights.
Energizer Solar hybrid inverters
Single-phase and three-phase families
The manual states the battery works only with this inverter range — it is not an open battery.
Energizer specifications and source documents
The name on the box is one of the best known in batteries, and it is a licence rather than a manufacturer. In Australia the Energizer Solar range is supplied and warranted by 8 Star Energy, a Melbourne company that holds the brand licence, and the battery itself is a stackable high-voltage unit made in China. Powerstack is a main unit with identical sub-units stacked beneath it, wall-fixed, and it runs only on Energizer Solar’s own hybrid inverters. None of that is disqualifying, but it changes who you are actually buying from, and a buyer who thinks the torch company stands behind the warranty has misread the arrangement before they start.
- Current Energizer line-up in Australia: Powerstack PS2900H-2 (5.76 kWh usable), Powerstack PS2900H-3 (8.64 kWh usable), Powerstack PS2900H-4 (11.52 kWh usable), Powerstack PS2900H-5 (14.4 kWh usable), Powerstack PS2900H-6 (17.28 kWh usable), Powerstack PS2900H-7 (20.16 kWh usable). Source
- Energizer pairs with its own hybrid inverter: new solar-and-battery installs use one unit; a retrofit means replacing the existing inverter. Source
- Usable capacity runs from 5.76 kWh to 20.16 kWh. Source
- Capacity can be added later without replacing the inverter. Source
- The manufacturer warranty is 10 years, with 60% of original capacity guaranteed at the end of it. Source
- It works with Energizer's own inverters only. Source
- Listed models are on the Clean Energy Council approved battery list. Source
- Any accredited installer can fit Energizer under the manufacturer's warranty terms. Source
- The Powerstack models in this record are on the Clean Energy Council approved battery list under the Australian licensee, which is the hardware condition of the federal Cheaper Home Batteries Program; the earlier Energizer Homepower line no longer appears on that register, so a quote naming it does not clear the gate. Source
Energizer questions, answered
- Is this battery made by the Energizer everyone knows?
- Not directly. Energizer licenses its brand name for solar products, and in Australia the Energizer Solar range is supplied and warranted by 8 Star Energy, a Melbourne company that holds that licence. The battery is manufactured in China. This matters because the warranty you would claim against is the licensee’s, not the global brand’s, so judge the Australian company on its own record.
- Is Energizer eligible for the federal battery rebate?
- The Powerstack models in our record are on the Clean Energy Council approved battery list under the Australian licensee, which is the hardware gate for the Cheaper Home Batteries Program. The older Energizer Homepower line is not on the current register. The install must also qualify on the usual conditions, so check that your quote names a Powerstack model string rather than the discontinued product.
- What happened with the older Energizer Homepower batteries?
- SolarQuotes reported that the Clean Energy Council moved to suspend the Homepower listings in March 2025, citing the importer of the day not being registered as a responsible supplier under the electrical safety scheme, an absent documentation website, and a failure to cooperate with its investigation. Those models are no longer on the register. Powerstack is a different product under a different Australian distributor, and it is listed.
- Can I use a Powerstack battery with my existing inverter?
- No. The user manual states the Powerstack system works only with the Energizer Solar hybrid inverter range. On a new install that is simply the system you are choosing. On a retrofit it means replacing whatever inverter you have, and the warranty on that inverter is a separate document from the battery warranty, so ask to see both rather than assuming one covers the lot.
- Why does the warranty care whether the battery is online?
- The manufacturer requires the ability to monitor the system and push firmware updates remotely through its fleet-management platform. The warranty makes registration and a reliable internet connection a condition of the full term and reserves the right to cut that term roughly in half where the system stays disconnected. If your connection is unreliable, treat that as a genuine cost of ownership rather than a technicality.
- What do Australian owners actually complain about?
- Reviews collected by SolarQuotes cluster around a few themes: surface rust on steel parts in exposed positions, fault warnings owners could not get explained, and slow or unhelpful support when they escalated. The monitoring app draws consistent praise. The sample is small, so treat it as a checklist for questions to ask rather than as a verdict on every unit.
- Will an Energizer system run my house in a blackout?
- Backup depends on the hybrid inverter and on which circuits are wired to its backup output, and that is a design decision made when the quote is drawn. Ask for the backed-up circuits named individually, and confirm the inverter is sized for what you expect to run. A tall stack of storage does not by itself keep anything going if the wiring was never designed for it.