Battery Storage - Optimising existing Solar PV Systems

Whether you are thinking about a new Solar PV system or have an existing install, adding battery storage will help you increase the savings from the energy you will generate. Many households are out during the day and only use 50% of the electricity generated from the solar panels. Installing battery storage can:

  • Maximise electricity savings by using the stored energy in the battery at night

  • Provide grid backup power (system dependent)

  • Charge the batteries in off peak times to use during peak times (system dependent) to save money.

  • Link to your Electric Vehicle and charge when convenient to you.

We have experience of installing a range of different technologies from suppliers including Solis, BYD, Pylon, LG and Tesla.

Solis Hybrid Inverter with a BYD Battery Pack

Solis Hybrid Inverter with a BYD Battery Pack

 

How does Battery Storage Work?

Basically your Solar Panels charge the battery during the day using any excess energy to provide you with free electricity when you get back home.

  1. Energy generated from the Solar PV is used for the homes demands

  2. Any excess energy generated is then used to charge the battery rather than exported back to the grid

  3. Other technologies like solar immersion controls and EV car charging can be setup to share the excess energy

The idea is that no solar energy is wasted by being sent back to the grid. The graph below shows the Old Dairy B&B Lympstone. They have a Bright Spark designed and installed battery storage system and are using solar power for 22-23 hours a day.

The Green Line is the Battery Charge, the Red Line is the Battery Usage and the Orange Line is the Grid usage - Only power from the grid is between 07:30 and 08:00 in the morning.

The Green Line is the Battery Charge, the Red Line is the Battery Usage and the Orange Line is the Grid usage - Only power from the grid is between 07:30 and 08:00 in the morning.