Does the size of a solar power system effect the investment in a solar storage battery?
Synopsis
The size of your solar array will impact the amount of battery storage required in your home. It's essential to understand your energy consumption and export to the grid to ensure the correct battery ratio. Oversizing your solar system is recommended, especially since there are government incentives to offset the cost of solar panels. A qualified installer can assess your bills and determine if a battery is worthwhile or if you need more solar generation. Ensure quality gear, including panels and inverters, are used in your system.
AC couple battery systems on homes without solar arrays are possible, but it's not cost-effective to purchase electricity at off-peak rates for discharge during peak times. Charging from your solar-generated energy is much more cost-effective than purchasing electricity from the grid.
Video Transcript
Yeah definitely the size of the solar array up on your roof will affect the amount of battery storage that you'll need in your home. What's important to understand, is what your, how much energy you're actually using in the home, and how much you're exporting back to the grid. Basically what you're exporting back to the grid is the amount of storage you can put into the battery. So you've got to make sure that that ratio is right.
Generally at the moment, as a rule of thumb, it does make a lot of sense to oversize your solar system. If you're just doing solar, or solar plus a battery, there's some pretty friendly government incentives and rebates out there which is really offsetting the cost of the solar panels. So if you've got the roof space, we say load up as large as you can typically. And that would give you the best return. There needs to be an assessment by a qualified installer who can look at your bills, find out how much you're exporting and importing, whether the battery is worthwhile for you, or if maybe you need more solar generation. Please make sure you're using the right quality gear within there, so you know the quality of panels and inverters within that system.
It's definitely possible to have a AC couple battery system on your home, without having an actual solar array on your roof. You could be potentially purchasing the electricity off peak rates, so maybe from midnight to 4:00 AM, and then discharging during peak times, later in the day, in the afternoon. It's not very common because there's not a great cost benefit from doing that. It's a lot more cost-effective to be charging from your own solar generated energy, that you would have been exporting anyway.
