Edward Posted April 30, 2021 Share Posted April 30, 2021 Can I install a capacitor bank on the 220v side to help start different motors like AC units,Air compressor,water pump,and hydraulic pump motor? If so what size capacitor bank? Will it back feed to the inverter and cause any damage? I been using off grid solar for over 10 years and have 3 years of college for industrial electronic. I have 52-6volt battery bank and now a new 15,000w/60,000w peak surge inverter that I been using 1 month now and uses heavy DC cables that are rated for over 400A at 24 volt and AC side has #6 copper cable rated at 55 amps going to a 50A breaker that has never tripped then to the main breaker box. The new inverter is rated at a continues 62.5 A output and a 10 second surge of 200A. I have trouble starting the capacitor start motors, sometimes they start some times they do not start. The motors run current is under 10A for the 220V and 15A for the 110V motors which is well below the upper limits of the inverter. I have used a clamp meter on the 110V 15A run motor and it draws 46.7 Amps MAX to start and 15.8A to run the air compressor motor. If it does not start in under 1/2 second it will not start. The capacitor has discharged. So the question is can I install a capacitor bank on the AC side? Are the capacitors in the inverter to small? Thanks for all you help and suggestions. Ed Quote Link to comment Share on other sites More sharing options...
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