| http://www.w3.org/ns/prov#value | - of five categories: First category is off-grid solar power system products, mainly including solar panel, Isolate power controller and stand along power inverter etc; Second category is on-grid solar power system products, mainly including PV solar module, grid tied power inverter etc; Third category is solar back up system, mainly including PV solar panel and back up power supply etc.
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