The size of battery storage that’ll be beneficial to you will be dependent on:
Your average daily energy usage
How much excess energy your solar system generates that you don’t use during the day and;
How much independence you want from the grid
As an example if you are using 6kWh of the 16kWh your solar system is generating during the day and you expect to use at least 10kWh of power at night (common for a household with 9-5pm workers) a 10kWh battery will store this excess power for you to be able to use at night once your solar 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 what battery, size is right for you, you should breakdown your daily power usage and how much power your solar system is generating. You can do this by either your power bill or by 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.
Just want an idea of the price range to expect when considering battery storage for your solar 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
Enphase AC Battery
$2,000 (Fully installed)
ELMOFO E-Cells ALB52-106
Delta Hybrid E5
Leclanche Apollion Cube
Fusion Power Systems Titan-3
Sonnenschein @ Home Lithium
Hybrid “Home” Plus
Senec.home Li 10
BYD B-Box RES
$26,000 (Fully installed)
Last Updated October 2018
* Nominal storage (when filled to the brim, which is not recommended for battery life)
** Price is approximate and may not include installation
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