How to Calculate Capacitor Required to Compensate Given KVAR?

Dear All, I have installed a micro hydro turbine using a INDUCTION GENERATOR on which 20 nos. of 40w tube lights are working. Power generated is as below: 215 V, 3.9 A, 509 Watt, 685 VAR, p.f.= 0.685 lagging How to compensate this reactive 685 VAR to improve the power factor and take more load o

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