6.3 kw Solar Electric System in Jordan, NY
Challenge
This 6,300 W (6.3 kW) grid-connected solar electric system was installed as a roof-mounted array of twenty-eight (28) SunPower 225W solar modules oriented South on the main roof of the Customer's house.
Solution
This 6,300 W (6.3 kW) grid-connected solar electric system was installed as a roof-mounted array of twenty-eight (28) SunPower 225W solar modules oriented South on the main roof of the Customer's house. The array was arranged as four rows of seven (7) modules in landscape. The modules are mounted at the same pitch as the client's roof using a UniRac SunFram racking system. The array layout is designed to maximize system size and future expansion, while allowing only minimal losses due to shading and ensuring the system is aesthetically pleasing and well-integrated with the house. The system is configured electrically as four (4) DC circuits (strings) of seven (7) series connected modules providing input through one (1) DC disconnect switch to one (1) SunPower 6000m, 6.0kW inverter. This inverter provides grid-synchronous AC output and interfaces to the electric utility through a dedicated circuit breaker in the Customer's main service panel, as existing infrastructure allows. System power production (kW) and cumulative energy (kWh) monitoring is provided by a SunPower Monitoring System, as well as by a digital display on the inverter and an electromechanical meter. As designed, this system should generate 6,654 kWh per year, for an average of 19.5 kWh/day (approximately 555 kWh/month), where daily energy production is both weather and seasonally dependent. This energy production is equivalent to 55% of the customer's present home electrical usage, and corresponds to a CO2 (greenhouse gas) emissions savings of 8,650 lb per year.
