Many people make the wrong connotation that they would need a battery in order for a solar system to run and generate electricity. That is just plain false. If you carefully think of it, the Brisbane solar grid acts as its battery. This means that if the panels above your roof produce excess power, they are stored in the grid. During the time that there is a shortage in the production, the electricity is then drawn from the difference to substitute it.
However, while there is no immediate need for a battery for solar grids, there are also reasons why you might need one. The reasons include:
- The ability to store the extra solar energy and utilise it during times when the sun is absent
- The ability to have a backup plan when the grid experiences a few issues
Traditionally, it is believed that these reasons come as a package and that a good solar battery storage should be able to accommodate both of these needs. This actually makes the whole system more affordable and practical.
Below, we will discuss a little more about the two major types of solar battery storages, one without a backup and one that has one.
Because of the absence of a backup system, this variant of the solar battery storage is cheaper and they are often simple in design and structure. What happens here is that the battery is considered as just one of the solar panels. This means that the battery goes straight to an input on the solar inverter.
In order for this type of battery storage to be integrated, you would only need a few materials such as:
- An external battery that has a high voltage output and an integrated charger.
- An inverter which is able to communicate with the BMS or the battery management system
- A meter to monitor the transfer of electricity
- A few yards of wire
As you may have guessed, this variant is leaning more towards the pricier side. However, even if the pricing looks expensive, you may be able to see its benefits and conclude that it is actually more practical compared to setting up one that has no backup.
You can actually set up and install this variant in two ways. You can either do an AC coupling or a DC coupling. But, let us concentrate more on the AC coupling.
AC coupling utilises 240V of AC in order to charge the batteries. This is common practice because the inverters that you will have to use with this setup will also provide 240V.
Moreover, you will need two inverters for AC coupling, the current one and another one that will act as the inverter charger. The inverter-charger is responsible for controlling the charge and discharge activities of the battery.
Essentially, you will be paying extra cost because of the additional inverters needed and additional work on modifying the wiring around your house. But, this could actually prove to be more practical because you will be able to use your Brisbane solar power with more freedom and availability.