Battery Sizes and Pricing

What size battery do I need?

The size of battery storage that’ll be beneficial to you will be dependent on:

  • Your households daily energy usage
  • How much excess energy your solar power system generates and;
  • How much independence you want from the grid

As an example, if you are using 6kWh of the 16kWh your solar power system is generating during the day and you expect to use at least 10kWh of power at night (common for a household with 9-5 pm workers) a 10kWh battery will store this excess power for you to be able to use at night, once your solar power system is no longer generating energy from the sun. This means unless you go over that 10kWh of power you won’t need to use any additional energy from the grid.

Before deciding which battery size is right for you, you should breakdown your daily power usage and how much electricity your solar power system is generating. You can do this with your power bill or a monitoring device.

From there you can calculate how much power you use and the excess you can store.

See below for current prices and brands out in the market.


Battery Pricing

Just want an idea of the price range to expect when considering battery storage for your solar power system? See a snapshot of some of the available batteries in today’s market below.

Learn the different factors and specifications of batteries that can affect pricing and ROI here

Brand Size* Price**
Enphase AC Battery 1.2kWh $2,000 (Fully installed)
Soltaro 2 2kWh $1,700
Pylontech US2000B 2.4kWh $1,999
SolaX 3.3 3.5kWh $5,390
Sonnenbatterie Eco 9.43 15kWh $$16,500
SunGrow SBP4K8 4.8kWh $3,500
ELMOFO E-Cells ALB52-106 5.5kWh $8,190
Akasol neeoQube 5.5kWh $12,000
Delta Hybrid E5 6kWh $6,600
Leclanche Apollion Cube 6.7kWh $9,200
Tesla Powerwall 2 14kWh $11,700
Sonnenschein @ Home Lithium 8.5kWh $10,109
Hybrid “Home” Plus 9.84kWh $11,000
Redflow ZCell 10kWh $12,600
Senec.home Li 10 10 kWh $12,500
BYD B-Box RES 10.24 kWh $7,500
Sunverge SIS 11.6kWh $26,000 (Fully installed)
Magellan HESS 12.8 kWh $20,600

Last Updated November 2019
* Nominal storage (when filled to the brim, which is not recommended for battery life)
** Price is approximate and may not include installation

Start speaking to installers and receive Obligation Free Quotes on Batteries!

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Understanding Batteries

Off-Grid Systems

For some households a battery system can be of great benefit and minimise a home’s reliance on the grid. However, it’s important to understand for a battery to be useful your solar system needs to be generating excess energy for the battery to store, which you can then use at night or when the sun is not out.

When selecting a battery, you’ll want to invest in a system that is most suited to your home and can drive the best return on investment (ROI). Despite a larger upfront cost, a higher quality battery may significantly increase your ROI.

    Battery systems start from $6,000 and costs can vary greatly based on the following factors:

  1. Cycle Life-Time

    The number of times a battery can fully charge and discharge.

  2. Battery Power (kW)

    How fast it can be charged or discharged.

  3. Storage Capacity (kWh)

    The maximum amount of energy a battery system can store.

  4. Battery Management System (BMS)

    An electronic ‘smart’ system that gathers data and manages the battery ensuring it does not overload or operate outside of its safe functioning zone..

  5. Inverter

    Battery systems require their own inverter if your solar system does not have a hybrid inverter.

  6. 'All-In-One Unit’

    A system which includes the battery, BMS and an inverter all in one unit.

  7. Warranty

    Length of time or cycles the battery system is under guarantee.

  8. Blackout Protection/Backup

    It’s important to note this is not a common feature of a battery system and could cost thousands of dollars to include. Blackout protection not only requires additional components but also a specialised installation and rewiring. For grid-connected homes, the cost for blackout protection can outweigh the benefit.

Additionally, if your purpose for adding battery is to go Off-Grid and become completely independent from the grid you will need to ensure your solar system can generate enough energy to power your home and your battery system is large enough to store this energy. For homes in metro areas going Off-grid is not cost effective and is only recommended for those in remote areas with limited access to the grid. Off-grid solar systems with battery start at approximately $30,000.

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