Soltaro Battery: An Independent Review by Solar Choice

Background on Soltaro – Company history

Soltaro is an Australian company, reporting they were established in 2016 although the ABN for Soltaro Pty Ltd only dates back to 2018. The company is known for importing and wholesaling energy efficiency equipment including solar batteries, inverters, heat pumps and EV chargers.

Soltaro’s products are manufactured in a facility in Wuxi, China. They currently ship products around the world with offices in Australia and the United Kingdom. Their Australian office is located in Tullamarine, Melbourne.

Soltaro’s products have received mixed feedback on 3rd party review platforms with many customers and solar installers referencing issues with their AIO2 battery solution.

Soltaro Battery Technologies and Model Range

Soltaro offers two flagship battery products in Australia, the AIO2 and the newer AIO3. Both series feature LiFePO4 (LFP) chemistry with over 10,000 cycle life, ensuring long-term durability. These batteries are All-in-one Energy Storage Systems (ESS) designed to cater to both on-grid and off-grid applications.

Soltaro AIO2 Battery

The Soltaro AIO2 can be used both on-grid and off-grid as per their datasheet. It is also capable of being used for an on-grid battery backup. This gives the AIO2 the ultimate flexibility for homes and small businesses who need to ensure they don’t lose power when it matters most. Moreover, as the AIO2 incorporates MPPT technology, it will always allow you to get the best out of your solar PV system.

When grid-connected, or connected to a local micro-grid, the Soltaro AIO2 can be connected in parallel. This allows your system to be modular and expandable as your energy storage needs change.

The batteries are also modular. You can add more battery storage up to 18 months after your initial installation. By allowing for changing energy needs and lifestyle changes, you are never buying more capacity than you need at that time.

Soltaro AIO3 Battery

The AIO3 is Soltaro’s latest product, featuring a larger range of sizes starting from 16kWh and stepping up to 36kWh in modular battery configurations (usable capacities range from 14.4kWh to 32.4kWh).

This All-in-One Energy Storage System (ESS) incorporates built-in inverters available in different sizes: 5kW, 8kW, and 12kW options.

It is a 3-phase power system and has an IP55 rating for outdoor installation, while the inverter component offers IP65 rating and can be wall-mounted or ground-mounted.

With a maximum current charging and discharging rate of 26A, the AIO3 is available in both hybrid and AC coupled configurations to suit various energy storage setups.

Soltaro AIO2 Battery – Key Features

There are a number of features of the Soltaro AIO2 battery worth mentioning:

Solar Battery Efficiency

With a round trip efficiency rating of 97%, Soltaro’s batteries compare favourably against many alternatives in the solar battery market. This basically means that 97% of the energy that is sent to the battery can be used within the home later after the losses incurred from charging the battery and then discharging it.

100% Depth of Discharge

Soltaro batteries offer a 100% depth of discharge which means customers can utilise 100% of the rated energy capacity by taking the battery all the way down to 0%. This is a good feature as many batteries only offer 80% to 90% depth of discharge.

How Much Do Soltaro Batteries Cost?

We’ve reached out to Soltaro for the wholesale cost of their batteries and will update this section when they respond back to us.

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Australian Warranty Terms For Soltaro AIO2 Batteries

Like most battery solutions in Australia Soltaro offer a 10 year product warranty for their battery. This warranty will terminate if the battery completes 10,000 cycles prior to 10 years which is over 2 battery cycles per day. This covers customers against manufacturing defects or unexpected faults in the battery that means it doesn’t perform as advertised. We do note that they specifically exclude damages caused by Wear & Tear, which mentions LED screen, LED lights, paint and cell degradation.

Soltaro warrants and represents that the Battery retains at least 85% of Nominal Energy (5KWH/10KWH) for five (5) years after the Warranty Start Date and at least 70% of Nominal Energy (5KWH/10KWH) for ten (10) years after under proper conditions of the use after the Warranty Start Date. Its good to see a performance warranty in place which is in line with most performance guarantees we see for solar batteries.

Unless specifically agreed to by Soltaro, no replacement will be provided for the entire Product. In each case, only the defective parts are replaced and the original Product is sent back. Also, Soltaro is not liable for damages caused to the exterior of the Product caused by installation, transport, or handling.

Although Soltaro do have an office in Tullamarine, Melbourne, many customers have reported tedious issues in claiming warranty, some of which have needed to make multiple claims.

Review Soltaro’s warranty document here.

Battery Specifications Soltaro AIO2

Usable Capacity	4.5kWh
Max. Output Power	2.56kW charge, 5.12kW discharge
Nominal Storage	5kWh
Dimensions (H x W x D)	54cm x 105cm x 22cm
Weight	79kg
Operating Temperature Range	-20°C to 55°C
Outdoor/Indoor	Indoor/Outdoor (IP65)
Warranty	10 years

Pros and Cons of Soltaro Batteries

Pros

Owned by Australian company and have local representatives
Standard 10 years warranty or 10,000 life cycles

Cons

Limited size options and products
Shorter company history that most battery brands and are a relatively unknown company
Many customers and installers have reported issues with the reliability of their batteries which can be reviewed through 3rd party review platforms

So, are Soltaro Batteries worth it?

In our opinion, there is too much noise around the reliability of these batteries. Solar Choice has received complaints from installation companies around the repeated failure of Soltaro’s AIO2 battery. Most of the negative feedback is related to Soltaro’s AIO2 battery. This battery is now superceded by the AIO3 battery, but due to its limited time in the market there is no track record yet to suggest that Soltaro have fixed reliability issues.

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Jeff Sykes

CEO at Solar Choice

Jeff has consulted on over 20MW of commercial solar projects, ranging from SMEs to ASX top 100 companies. Jeff has also provided independent advice to 100s of residential solar, battery and EV charging customers across every state in Australia. He holds an MBA from the Australian Graduate School of Management and is an expert in business strategy and financial analysis.