What Solar Battery Storage Systems are Available on the Market Today?

Tesla Powerwall

The use of solar battery storage in Australia is set to explode. Analysts are now predicting the residential battery storage market to increase by 18x by the year 2020.

Now with the introduction of the Tesla Powerwall to Australia, using a battery storage system with rooftop solar will be on the mind of many Australians.

The use of a solar battery storage system is becoming an attractive option for many reasons. Primarily, electricity generated by solar panels during the day can be used at night and in grid-power outages. Therefore higher evening electricity rates can be avoided.

This article provides a list of all energy storage products currently available in Australia today. Where possible, the current prices and key features are also mentioned.

Solar Battery Storage Options

Tesla Powerwall

Tesla Powerwall

Tesla Powerwall

The Powerwall is a wall-mounted, 7kWh lithium-ion battery storage system that comes with a 10 year warranty. The battery has a daily cycle, meaning it’s designed to charge and discharge each day. Additionally, it is designed to be used outdoors and will not drop in performance at temperatures above 25°C or below 5°C.

While the Powerwall has a sleek design, it doesn’t come with a solar inverter, or an energy management system. Therefore to be used to storage and manager rooftop solar generation it will need to be paired with additional technology.

Current Price: Between $12,000 and $12,500 with a compatible inverter.

RedFlow ZCell

RedFlow's ZCell Battery

RedFlow’s ZCell Battery

With a usable energy storage capacity of 10 kilowatt-hours (kWh), the ZCell is RedFlow’s first battery aimed at the residential market. It is based on the company’s zinc-bromide flow battery technology, a stationary battery type which usually deployed mainly for commercial and larger-scale applications.

Overall, ZCell offers an attractive, easy-to-install, robust and long-life energy storage system for home use.  ZCell’s benefits include: 100 per cent depth of discharge, greater safety inherent in ZCell’s flow battery design, robust performance in even hot and demanding remote locations without the need for external cooling until an ambient outside temperature of at least 45 degrees Celsius, and it is recyclable or reusable.

However, it does have a higher price point than its competitors.

Current Price: $17,500 – $19,500 for 10kWh.

Panasonic

From the popular Japanese company this 8kWh lithium-ion battery storage system has been specially designed for the Australian market. It has an output of 2kW and will best suit solar systems of around 5kW.

Moreover, this battery can also be programmably charged and discharged – allowing users to take take advantage of varying electricity prices for additional power supply.

Current Price: $4,990 when purchased in conjunction with an ActewAGL solar system installation.

LG Chem

LG Chem currently has the largest share of the grid-connected battery storage market in Australia. Its next-generation 6.4kWh battery is cheaper, smaller, lighter, and has had a design revamp since its previous release.

The battery’s peak output is 5kW (@25°C) which should handle the kettle, the toaster and a third energy hungry appliance. Importantly, LG Chem’s storage system can be easily expanded by adding expansion battery packs (of 3.2kWh) to 9.6kWh or 12.8kWh total energy storage.

Current Price: $7615 through Rainbow Power Company

WattGrid 10

Made by AllGrid Energy, a Brisbane-based company, is an affordable 10kWh battery storage solution. While larger (and less visually appealing) than some other offerings on this list, the WattGrid 10 has been designed with Australian conditions in mind. It has an operating temperature range of -20°C or below 43°C.

Additionally, it comes in two models: lithium-ion or lead acid (tubular gel). However, it should be also noted that warranty is only covered for 5 years, despite it having an expected operational life of 10 years.

Current Price: $11,999

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