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About SRCC OG-300 System Ratings |
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The Solar Rating & Certification Corporation OG-300
systems level rating is an independent assessment of both system
reliability and performance. Systems that receive this rating must
meet HUD minimum property standards in addition to a rigorous review
performed by SRCC staff and design review team. Once the system has
passed these quality assurance checks it undergoes a full performance
analysis to estimate the actual solar contribution of the system towards
an average hot water load. This contribution is defined by the
Solar Energy Factor.
To convert the Solar Energy Factor (SEF) to a Solar Fraction, use the following formula: Solar Fraction (SF) = 1 - (EF/SEF) where EF is the efficiency of the backup water tank. The EF for a standard electric backup water heater is 0.9, and the EF for a standard gas backup water heater is 0.6. |
