Solar batteries are usually of two types - AC and DC batteries, and the difference between these two lie in their efficiency levels, as well as the manner in which they connect to the solar panels and grids. AC batteries will be more advantageous if you add it to your existing solar system, since it is more cost-effective than a DC battery. However, in the case of a new solar system, DC batteries will be a better addition to the system, as these are simpler to operate.
In this article, we will see what is the difference between AC and DC batteries, and try to find out which one is the best for you.
DC, or direct current is the current that flows in a single direction, to provide the circuit with power. On the other hand, AC, or alternating current tends to flow in two directions and keeps switching frequently. AC electricity is mostly preferred in homes for various electrical appliances because it can be safely transmitted over long distances and is more affordable.
In most solar homes, the solar panels produce DC current - which flows into the solar inverter where it gets converted to AC electricity to be used by household appliances. Direct current is used by batteries as well, but they need to be connected to an inverter as well. Solar battery banks are useful, especially when there are frequent power outages in your locality.
If you have a home solar system and you install a battery alongside it, special equipment can be installed by the solar installer. This equipment works to connect the solar panels to a charge controller, and then gets connected to a battery bank. After that, a connection is made with the solar inverter, and ultimately the solar panels are connected to the main electrical panel in the home. This entire process is referred to as the DC-coupled battery back-up, because DC electricity is used to charge and discharge the battery.
For a very long time, only DC-coupled batteries were available, and those people with existing solar systems did not have a feasible way of getting any battery back-up. However, AC-coupled solar batteries have recently become available and are quite popular among such people. They require this power back-up to provide them with electricity during times of power cuts.
A DC-coupled battery makes no sense for anybody with a solar panel already attached to a grid-tie inverter or a microinverter. It would only mean replacing an already working system with another expensive new equipment - which is a complete waste of money. Instead, the solar energy system users can now simply purchase an AC-coupled battery, and install it with the existing solar energy system in place. With the AC battery, there is no complicated long process of converting the electricity and then reaching the main unit. This one comes with its own inverter, which means that the current directly reaches the appliances in the house. With special wiring, the solar panels or the grid can be used to charge the battery. It also acts as a back-up power, when the grid goes down and there is a power outage.
In this article, we have tried to inform you about certain crucial factors that you must have knowledge about before investing in a solar power system. One of the main factors is the difference between AC and DC batteries that are used in solar systems. We have covered topics like how the two types of batteries function, their mechanism, the differences between the two, the similarities, and the advantages as well as disadvantages. Solar systems can prove to be highly beneficial for your home or any commercial building, if chosen properly and with a lot of care.
We hope this article helps you navigate your way through to find the perfect solar system for your home or understands your existing system better.