Grid Tied With Battery Back Up Solar Systems

Learn more about grid tied with battery back up solar electric energy systems.

Grid Tied With Battery Solar Systems

The grid tied with battery back up solar system is very similar to the grid tied solar energy system type.

It makes power from the sun for use in your home when there's sunlight, takes it from the grid when it needs to (during clouds / night) and feeds surplus energy back into the grid accumulating an energy credit on your electric bill.

The only difference is, the grid tied with battery back up system also uses a battery bank to store energy as a back up, eliminating the need to use utility power at night and thus saving you even more money.

Additionally, a battery bank insures that you will always have a constant source of power and that your family will still have power in a black out or power failure.

Big or Small Battery Back Up?

Often people with grid tied solar systems only require a very small battery bank since they only use it for emergencies.

Others prefer to have enough storage space in their battery bank for enough energy so that they can go without using utility company power for many days of no sunlight. This way they can accumulate a bigger energy credit on their bill (instead of using the power) and thus have even more reserve energy available in the form of a huge unused electric company power credit.

Whether you decide to go big or small with your battery bank for your grid tied with battery back up system, implementing one will require additional photovoltaic components as well as slightly different wiring than with a simple grid tied solar set up.

The Grid Tied With Battery Back Up Set Up

A typical grid tied with battery back up solar system consists of solar panels (to collect the power), an array DC disconnect (to be able to cut the power from the PV panels), a charge controller (to regulate the charge to the battery), a battery bank (to store power), a system meter (to monitor power usage and status), a main DC disconnect (to cut power to battery bank / inverter), an inverter (to convert it from DC to AC), an AC breaker panel (to accept and distribute power to your household loads, the kilowatt per hour per meter and to the grid) which also sends power back.

These types of solar systems use a system controller that automatically decides whether to draw power from the solar panels, from the battery bank or from the utility grid based on how you set it. So you can set it to draw from your battery if there's no sun, and from the grid if there no battery power. This way you use as little (expensive) utility energy as possible.

Get Paid By Your Power Company

The grid tied with battery back up system sends surplus electricity back into the grid (using net metering) if you produce more solar energy in the day than you use. This results in an accumulating energy credit on your electric account. If your solar panel array produced enough electricity your power meter would actually start to spin in reverse.

Since the energy you produce with a grid tied with battery back up solar system counts against the energy your home uses, you are in essence, getting paid by the power company to produce energy for them.

And since you now have a battery bank, you can use less of the utility company's power and bank it instead.

A huge surplus of grid energy is a great thing to have stored and ready when you need it, possibly during system maintenance, replacement or repair.

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