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Todd, You are getting credit for all the energy your system can produce. Turn off the humidify and you'll see the power factor go up to nearly 1.0. That's what the inverter is operating at, regardless of whether the humidifier is on or off. Say the PF is 80% without the inverter running. That means the utility is providing some reactive power or VARs. With the inverter running, the real power delivered by the utility is reduced, but the reactive power is not changed. To see it mathematically: the VA delivered by the utility is the square root of the sum of the squares of VAR and Watts. PF = W/VA = W/sqrt(W^2+VAR^2). Reduce W without changing VAR and the power factor goes down, possibly even to zero. Kent Osterberg Blue Mountain Solar toddc...@finestplanet.com wrote: I have a question about my personal home system. It is an Outback battery based grid tie. My digital utility meter is capable of reading var and power factor. So often (like just now) when I read this it is not even close to unity. Today's reading was 1.57 VAR, 56 PF. What is going on here? Am I not being credited for everything I am selling? The only significant load I have running is a dehumidifier... so an inductive load. |
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