Alpha ESS (written AlphaESS by the company) is a Chinese battery maker founded in 2012 that has sold SMILE home batteries in Australia since 2015. As at November 2026 its SMILE-G3-S5 costs about A$4,600 for 9.6 kWh of usable storage after the federal discount, before installation, and owners rate the brand 4.6 out of 5 from 724 ratings on SolarQuotes. The catch is support: reviewers call it weaker than rivals, so the installer matters as much as the hardware.
This is independent desk research. Solar Cobber did not contact AlphaESS or any installer, did not test the products and was not paid by the manufacturer. Company statements are attributed to the company. This page is the hub for everything we publish on the brand, including our AlphaESS SMILE-G3 review, the Alpha ESS battery price guide and the AlphaESS app guide.
Source: SolarQuotes AlphaESS review and battery price list, read November 2026.
Key facts
- AlphaESS is a Chinese manufacturer founded in Nantong City, Jiangsu Province, in 2012, and it opened an Australian subsidiary in 2015, according to SolarQuotes’ AlphaESS review read in November 2026.
- SolarQuotes lists the AlphaESS SMILE-G3-S5 with 9.6 kWh of usable storage at about A$4,600 after the federal battery discount, including GST and excluding installation (list updated 12 May 2026).
- SolarQuotes shows AlphaESS at 4.6 out of 5 from 724 owner ratings in November 2026, the lowest of the eight battery brands we compared on that site, where the others score 4.7 to 5.0.
- AlphaESS’s warranty for SMILE systems installed from 1 November 2024 runs 10 years or until 3,120 kWh has been discharged per kWh of usable capacity, whichever comes first, with at least 70% capacity retained, according to SolarQuotes.
- At one full cycle a day, the 3,120 kWh cap is reached after about 8.5 years (Solar Cobber calculation: 3,120 divided by 365).
- The AlphaESS SMILE-G3 battery module BAT-9.3S appears on the Clean Energy Council approved batteries list, according to our SMILE-G3 review.
- AlphaESS lists an Australian hotline of 02 9000 7676 and offices in Homebush West, New South Wales, and St Marys, South Australia, on its Australian site (checked November 2026).
Alpha ESS at a glance
AlphaESS sells lithium iron phosphate (LFP) home batteries, most with a built-in hybrid inverter, through Australian installers and distributors. The table summarises the company as at November 2026.
| Item | What we found | Source |
|---|---|---|
| Brand and legal name | AlphaESS; Australian arm trades as Alpha ESS Australia Pty Ltd | AlphaESS warranty document, March 2024 |
| Founded | 2012, Nantong City, Jiangsu Province, China | SolarQuotes review, November 2026 |
| Australian presence | Subsidiary opened 2015; office at 31 Richmond Road, Homebush West NSW 2140; second address at 8 Walsh Avenue, St Marys SA 5042 | AlphaESS Australia contact page |
| Support contacts | Hotline 02 9000 7676; separate after-sales email listed on the Australian site | AlphaESS Australia contact page |
| Scale (company claims) | Over 1,000 staff, five manufacturing centres (four in China, one in Malaysia), products sold in over 140 countries and regions | SolarQuotes, repeating company statements |
| Ownership or stock listing | We could not confirm a stock listing or ownership structure from a primary source | Not confirmed |
| Product lines in Australia | SMILE-G3 (single and three phase), SMILE-M5 (single phase), plus commercial lines | AlphaESS Australia site |
| Warranty | 10 years, 70% capacity, 3,120 kWh per usable kWh (installs from 1 November 2024) | SolarQuotes summary of the Australian warranty |
| Clean Energy Council list | BAT-9.3S and BAT-10.1P listed (BAT-724 and BAT-642) | Our SMILE-G3 review |
| Monitoring | AlphaESS app and AlphaCloud (cloud.alphaess.com) | AlphaESS app guide |
AlphaESS also says on its Australian site that it has delivered more than 795 GWh of energy since 2015. That is a company claim we could not check.
Alpha ESS products in Australia
AlphaESS sells two home battery families here: the SMILE-G3 and the older SMILE-M5. As at November 2026 the SMILE-G3 is the one most installers quote for new jobs.
| Line | Type | Inverter power | Usable capacity range | Backup |
|---|---|---|---|---|
| SMILE-G3-S5 | Single phase hybrid | 5 kW | 9.3 to 37.2 kWh (1 to 4 modules) | Up to 5,000 VA |
| SMILE-G3-B5 | Single phase AC-coupled, no solar input | 5 kW | Same 9.3 kWh BAT-9.3S modules; stack limit not separately confirmed | Not confirmed |
| SMILE-G3-T5 and T10 | Three phase hybrid | 5 or 10 kW | 9.3 to 55.8 kWh (1 to 6 modules) | 5,000 or 10,000 VA |
| SMILE-G3-T15 and T20 | Three phase hybrid | 15 or 20 kW | 18.6 to 55.8 kWh | AlphaESS says up to 20 kW |
| SMILE-M5 | Single phase hybrid | 5 kW | 5 to 30 kWh with 5 kWh modules (1 to 6); newer 13.99 kWh modules stack to 27.98 kWh | Not confirmed |
The G3 figures come from AlphaESS Australia’s SMILE G3 page and the datasheets summarised in our SMILE-G3 review. The M5 figures come from its Australian datasheet (V04, 1 March 2024) and SolarQuotes. A 5 kW single phase inverter charges, discharges and backs up at 5 kW whatever the battery size, so a bigger stack lengthens runtime and does not add power.
Alpha ESS prices in Australia
An AlphaESS SMILE battery costs about A$3,700 to A$11,500 as hardware after the federal discount, depending on model and size, plus installation. The table uses SolarQuotes’ price list (updated 12 May 2026, read November 2026), which includes GST and excludes installation.
| System | Usable capacity | Price after federal discount, not installed | Price per usable kWh |
|---|---|---|---|
| SMILE-M5 | 10 kWh | A$3,700 | A$370 |
| SMILE-M5 | 15 kWh | A$4,500 | A$300 |
| SMILE-M5 | 20 kWh | A$5,600 | A$280 |
| SMILE-G3-S5 | 9.6 kWh | A$4,600 | A$479 |
| SMILE-G3-S5 | 19.2 kWh | A$7,800 | A$406 |
| SMILE-G3-S5 | 28.8 kWh | A$11,500 | A$399 |
Add roughly A$500 to A$3,000 for installation (the range our price guide uses, from Solar Battery Supermarket’s metro starting price to SolarQuotes’ assumption for a good quality install). Our estimate for a 9 to 10 kWh SMILE-G3 installed after the discount is about A$5,100 to A$8,000. The federal battery discount pays 6.8 certificates per usable kWh up to 14 kWh for installs to 31 December 2026, and 5.7 from 1 January 2027, so a 9.3 kWh system earns about 63 certificates now and about 53 later.
The next chart puts AlphaESS against three rivals on the same SolarQuotes list.
Source: SolarQuotes battery price list, updated 12 May 2026; inverter add-on as used in our Alpha ESS battery price guide. Solar Cobber calculation. AlphaESS prices include the built-in hybrid inverter; the Sungrow figure with inverter adds A$2,300 to A$8,100 and divides by 12.8 kWh.
View the data as a table
| A$ per usable kWh | |
|---|---|
| Sungrow SBR plus 5 kW inverter | A$813 |
| Tesla Powerwall 3 (with Gateway) | A$741 |
| Sungrow SBR (no inverter) | A$633 |
| AlphaESS SMILE-G3-S5 | A$479 |
| AlphaESS SMILE-M5 (15 kWh) | A$300 |
On this list the SMILE-M5 at 15 kWh costs about A$300 per usable kWh and the SMILE-G3-S5 at 9.6 kWh about A$479, against A$741 for the Tesla Powerwall 3. See the Sigenergy battery price guide, Sungrow battery price guide and Fox ESS battery price guide for the rivals’ ranges.
Warranty and Australian support
The AlphaESS warranty is 10 years on the product and on battery performance, but the battery cover ends early if you discharge 3,120 kWh per usable kWh first. According to SolarQuotes, this applies to systems installed from 1 November 2024, and the warranty requires installation by an accredited installer with a valid AlphaESS Installer ID and a working internet or mobile data connection for monitoring. Earlier AlphaESS systems carried a five-year warranty on the electronics, and the March 2024 Australian document cut cover to three years for systems not connected to AlphaESS’s servers, so check which document applies to your install date.
The throughput cap is the term most buyers miss. The chart shows how fast the cap arrives at different usage.
Source: Solar Cobber calculation from the 3,120 kWh per kWh cap reported by SolarQuotes for systems installed from 1 November 2024. 3,120 divided by (cycles per day multiplied by 365). A cycle is one full discharge of usable capacity.
View the data as a table
| Years to reach the cap | |
|---|---|
| 0.5 a day | 17.1 years |
| 0.85 a day | 10.1 years |
| 1 a day | 8.5 years |
| 1.5 a day | 5.7 years |
| 2 a day | 4.3 years |
A household that uses 85% of its battery every day, or about 0.85 cycles, stays inside the cap for the full 10 years, and a household that cycles twice a day on a virtual power plant (VPP) reaches it in about 4.3 years. A VPP is a group of home batteries that a retailer or aggregator dispatches together for payment. Rivals such as the Sungrow SBR and Tesla Powerwall 3 are listed in our reviews with unlimited cycles for home use, so ask your installer which terms apply.
Support is the weak point. SolarQuotes calls AlphaESS warranty support “embarrassingly lacklustre” and technical support poor in its experience, and describes one customer who spent months on a claim for an older model and complained to the ACCC and a state fair trading office. AlphaESS lists a hotline and an after-sales email on its Australian site, and you also have Australian Consumer Law guarantees on top of the written warranty. If your installer closes, you would deal with AlphaESS directly, so read our tracker of solar company failures.
Is Alpha ESS any good?
AlphaESS is a sound budget choice when a reputable installer with AlphaESS experience fits and supports it, and a risky one when the quote is simply the cheapest. SolarQuotes’ engineer says the brand “has greatly improved over the years”, that its cheap price attracts the cheapest installers, and that you should spend more time researching the retailer than the battery on a cheap AlphaESS quote.
The independent evidence we found:
- Owner ratings. SolarQuotes shows 4.6 from 724 ratings, which it describes as low for a home battery but trending better. The other brands we checked on the same site in November 2026 sit higher, as the chart below shows.
- Testing. We found no result for AlphaESS in the public battery test programs we looked at, so we cannot cite a lab result.
- Recalls. The ACCC Product Safety site could not be searched by keyword from our tools, and none of the Australian sources we read reported an AlphaESS battery recall. Check productsafety.gov.au yourself before buying.
- Market position. SunWiz’s 2026 manufacturer rankings (based on 2025 installs) name Sigenergy as the top battery manufacturer and Fox ESS as fastest growing, and AlphaESS does not appear in the published summary, which lists only companies that opted in. We could not verify an AlphaESS market share figure. AlphaESS has posted its own claim of a SunWiz number one monthly ranking, which we could not confirm.
Source: SolarQuotes battery review pages, read November 2026. Ratings are owner-submitted on a broker site and are not a lab test. Sample sizes differ widely.
View the data as a table
| Average rating | |
|---|---|
| SolaX | 5.0 stars |
| GoodWe | 4.9 stars |
| Sigenergy | 4.9 stars |
| Sungrow | 4.9 stars |
| BYD | 4.9 stars |
| Tesla Powerwall 3 | 4.9 stars |
| Fox ESS | 4.7 stars |
| AlphaESS | 4.6 stars |
AlphaESS has the lowest average of the eight brands, though 591 of its 724 ratings are five stars. The breakdown shows where the lower average comes from.
Source: SolarQuotes AlphaESS review page, read November 2026. 81.6% five star, 10.2% four star, 2.3% three star, 1.0% two star and 4.8% one star.
View the data as a table
| Ratings | |
|---|---|
| 5 star | 591 |
| 4 star | 74 |
| 3 star | 17 |
| 2 star | 7 |
| 1 star | 35 |
One-star ratings (35, or 4.8%) outnumber two-star and three-star ratings combined, a pattern that matches the polarised experience SolarQuotes describes: good when set up and supported well, poor when not.
| Brand | SolarQuotes average | Ratings counted |
|---|---|---|
| SolaX | 5.0 | 180 |
| GoodWe | 4.9 | 768 |
| Sigenergy | 4.9 | 1,998 |
| Sungrow | 4.9 | 1,137 |
| BYD | 4.9 | 277 |
| Tesla Powerwall 3 | 4.9 | 405 |
| Fox ESS | 4.7 | 341 |
| AlphaESS | 4.6 | 724 |
Alpha ESS vs alternatives
AlphaESS wins on price per kWh and loses on support reputation. The table compares it with three rivals we have reviewed, using SolarQuotes prices after the federal discount and before installation.
| AlphaESS SMILE-G3 | Sigenergy SigenStor | Sungrow SBR | Tesla Powerwall 3 | |
|---|---|---|---|---|
| Our review | SMILE-G3 review | SigenStor review | SBR review | Powerwall 3 review |
| Approx. price after discount | A$4,600 for 9.6 kWh | A$8,000 for 13 kWh | A$8,100 for 12.8 kWh, plus inverter | A$10,000 for 13.5 kWh |
| Built-in inverter | Yes | Yes | No | Yes |
| Retention and throughput | 70%, 3,120 kWh per kWh, 10 years | 70%, about 3 MWh per kWh, 10 years | 70% at 10 years, unlimited home cycles | 70% at 10 years, unlimited home cycles |
| SolarQuotes rating | 4.6 (724) | 4.9 (1,998) | 4.9 (1,137) | 4.9 (405) |
Both AlphaESS and Sigenergy cap throughput, so a fair price comparison divides price by the energy the warranty covers. This is our own calculation, using hardware prices only.
Source: Solar Cobber calculation from SolarQuotes prices (updated 12 May 2026) and the throughput caps in our product reviews. Working: A$4,600 divided by (9.6 kWh x 3,120 kWh) = 15.4c; A$11,500 divided by (28.8 x 3,120) = 12.8c; A$4,500 divided by (15 x 3,120) = 9.6c; A$8,000 divided by (13 x 3,000) = 20.5c. Sigenergy's cap is about 3 MWh per kWh. Excludes installation, and assumes the cap, not the 10 years, is what you exhaust.
View the data as a table
| Cents per kWh of warranted throughput | |
|---|---|
| Sigenergy SigenStor 13 kWh | 20.5c |
| AlphaESS SMILE-G3-S5 9.6 kWh | 15.4c |
| AlphaESS SMILE-G3-S5 28.8 kWh | 12.8c |
| AlphaESS SMILE-M5 15 kWh | 9.6c |
On this measure the SMILE-M5 stores energy at about 9.6 cents per kWh of warranted throughput and the Sigenergy SigenStor at about 20.5 cents, before installation. That is hardware only, and it ignores support quality, backup power and the 5 kW single phase limit.
Who installs Alpha ESS in Australia
Any accredited installer can fit AlphaESS, and the installer is your main support line. Owner photos on SolarQuotes’ AlphaESS page (November 2026) name installers such as Regen Power, Plico Energy WA, Think Renewable and Solar Battery Group. These are photo tags, not a ranking or an endorsement. Read our reviews of Regen Power, Plico Energy, Think Renewable and Solar Battery Group, then browse our installer directory, including New South Wales and Western Australia listings. Check each company on the Clean Energy Council approved retailer list and the Solar Accreditation Australia register yourself.
Where Alpha ESS products are made
AlphaESS batteries are made in China, with a manufacturing centre in Malaysia as well, according to SolarQuotes’ summary of company statements. From 2019 AlphaESS assembled a number of battery systems in Adelaide because of a South Australian government subsidy, SolarQuotes says. We could not confirm whether any Australian assembly continues.
The video above is AlphaESS’s own installation walkthrough for the Australian three phase SMILE-G3-T10 with 9.3 kWh modules. It is a manufacturer video, so treat it as a description of how the product is meant to be installed, not independent evidence.
What to ask before you sign an AlphaESS quote
- Which exact model and module is quoted (SMILE-G3-S5, B5, T5, T10, T15, T20 or M5)?
- How many AlphaESS systems has the installer fitted, and who handles a warranty claim?
- Are both consumption meters included? SolarQuotes says proper monitoring often needs two.
- Which circuits are backed up, and can a 5 kW single phase unit start your pump or air conditioner?
- Does the quote show the federal discount as its own line, with the certificate count?
- Which warranty document applies, and what happens if the system loses its internet connection?
See how to compare solar quotes, how to choose a solar installer and how many years batteries last.
FAQ
Is Alpha ESS a good battery brand?
AlphaESS makes low-cost, Clean Energy Council listed batteries with a weaker support reputation than the top brands. SolarQuotes rates it 4.6 out of 5 from 724 owner ratings in November 2026, against 4.7 to 5.0 for seven rivals. A well-reviewed installer with AlphaESS experience is the main safeguard.
Who owns Alpha ESS?
We could not confirm AlphaESS’s ownership or any stock listing from a primary source. SolarQuotes says it is a Chinese manufacturer founded in Nantong City, Jiangsu Province, in 2012, and the Australian arm is Alpha ESS Australia Pty Ltd.
Where are Alpha ESS batteries made?
AlphaESS batteries are made in China and Malaysia, according to company statements reported by SolarQuotes. AlphaESS also assembled some systems in Adelaide from 2019.
How much does an Alpha ESS battery cost in Australia?
A 9.6 kWh SMILE-G3-S5 costs about A$4,600 after the federal discount before installation on SolarQuotes’ May 2026 list, and our installed estimate is about A$5,100 to A$8,000. The full breakdown is in our Alpha ESS battery price guide.
How long is the Alpha ESS warranty?
The AlphaESS warranty is 10 years for SMILE systems installed from 1 November 2024, with at least 70% capacity and a cap of 3,120 kWh discharged per usable kWh. At one cycle a day, the cap is reached after about 8.5 years.
Does Alpha ESS work with solar and during blackouts?
Yes. The SMILE-G3-S5, T-series and SMILE-M5 are hybrid systems that connect solar panels directly, and the AC-coupled B5 suits an existing solar system. Backup is up to 5,000 VA on the S5 and T5, but it depends on installation and configuration.
Is Alpha ESS better than Sigenergy or Sungrow?
AlphaESS is cheaper per kWh, and Sigenergy and Sungrow have higher SolarQuotes owner ratings (4.9 against 4.6). Sungrow and Tesla list unlimited home cycles in our reviews, while AlphaESS caps warranted throughput.
Where can I log in to monitor an Alpha ESS battery?
Log in at cloud.alphaess.com or in the AlphaESS app. Our AlphaESS app guide covers registration, Wi-Fi setup and fixes.
Sources
- SolarQuotes: Alpha-ESS battery review and ratings
- SolarQuotes: battery reviews index and brand pages
- SolarQuotes: solar battery prices and system costs
- AlphaESS Australia: SMILE G3 series
- AlphaESS Australia: contact details
- SunWiz: Top Solar Equipment Manufacturers Australia 2026
- Clean Energy Council: approved batteries list
- ACCC Product Safety Australia: recalls
- DCCEEW: Cheaper Home Batteries Program
About this guide
Written by the Solar Cobber editorial team from independent desk research, with ratings, prices and program details checked in November 2026. Solar Cobber is a free directory that may earn referral or advertising fees from installers. Commercial relationships never affect our content. This guide is general information, not financial advice. To report an error, contact us.
Filed under Solar Products
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