Balance of System (BOS Components)

What is a BOS component?

There is not a lot to mention about a balance of system or BOS component; but, it is still a critical mention to reduce any potential surprises for a new solar installation query. BOS components are necessary to connect your solar energy system to your electrical panel and meter! These are the wires that allow the DC energy to pass through your sister to convert into AC energy.

Both grid-connected and off-grid home renewable energy systems require additional “balance-of-system” equipment. Photo courtesy of

For your system to function correctly, BOS components must be included in your solar energy system.

What is included in BOS[1]?

  • Wiring
  • Switches
  • Mounting systems
  • Junction boxes
  • Metering system
  • Power conditioners
  • Sensors

Also, all the inverters, battery banks, and equipment that we mentioned before!

Other optional components in a solar balance of system include[2]:

  • Maximum power point tracking, MPPT
  • GPS solar trackers
  • Energy management software.
  • Solar concentrators.
  • Solar radiation sensors.
  • Wind equipment.
  • Any additional equipment that may be installed

[1] (SinoVoltaics, n.d.)

[2] (Solar Energy, 2015)

Two stack single line BOS diagram courtesy of OutBack Power

What do BOS Components cost?

The costs for your BOS components will vary depending on the size and complexity of your installation.. If you decide to add smart systems to your home, or if your home is quite large, the number of components your system may need will be determined by one of SEAAA’s certified installation partners.

Whichever BOS components necessary for installation with your solar energy system, SEAAA can help oversee the project and ensure your installer uses the highest quality of innovative inverters available to them. Recommended manufacturers include Midnight Solar, Outback Solar, and Magnum Energy.

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