Unlike an off-grid system (w batteries), Grid-tie inverters require utility to function. and like what walter said it has a safety feature called anti-islanding protection. Hindi magpoproduce ng power ang inverter during outages para maprevent backfeeding ng kuryente sa grid which is delikado in case may gumagawang utility workers sa poste.
With regards sa load sharing, for example you are consuming 2,000W on a sunny day and your inverter can produce 1,500W. 500W lang share ng meralco.
Btw, may expo tomorrow sa SMX on anything solar. Free admission
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