Each system we design and install is customized, as each customer's energy needs and living space is unique. Here are some sample system sizes with production output to review. For assistance with planning an grid-tie system, contact us for a site evaluation and consultation.

Washington Made Equipment

System size # of PV modules Energy produced* Roof space minimum
~ 2 kW 12 modules 2000 - 2400 kWh/yr. 200 SF
~ 4 kW 22 4000 - 4800 360
~ 8 kW 46 8000 - 9600 760

Non-Washington Made Equipment

System size # of PV modules Energy produced* Roof space minimum
~ 2 kW 8-12 modules 2000 - 2400 kWh/yr. 160 - 200 SF
~ 4 kW 16-22 4000 - 4800 320 - 400
~ 8 kW 34-44 8000 - 9600 640 - 800

* For more information on energy production, see PV System Performance Factors.

Batteries: An optional battery bank can be added to grid tie systems. Although batteries provide the benefit of backup power in the event of a grid outage, they reduce overall system efficiency by approximately 10%. Batteries require periodic maintenance.