William, One other option, if the AV crew can see the light, is replace the UPS with an inverter like Magnum MS1012 and a separate battery equal to the UPS capacity. The Magnum has broad input voltage and should the SB fail to provide power, the transfer time is likely fast enough (16ms) to replicate the UPS. Use a high Vac dropout setting in this case.
Just trying to think outside the box. I’ve done this in RV’s and it works fine. Larry On Aug 16, 2014, at 1:03 PM, William Miller <will...@millersolar.com> wrote: Friends: I met with the AV crew yesterday. They are completely unwilling to run the system without a UPS. I have some choices: 1. See if we have a real problem, and if so, how bad is it? 2. Temporarily disable the Sunny Boy inverters to see if eliminating the Frequency Shift Power Control (FSPC) makes the UPS happier. I have done this and am waiting for results. 3. If the above creates good results, consider removing the Sunny Boy inverters and rely on direct DC battery charging, maybe by using Morningstar MPPT-600 charge controllers. 4. Find out if the inverters, generator or both are causing a problem. 5. If it is the generator, have it repaired or try to reprogram the Sunny Island inverters to disable transfer and utilize battery charging only. Has anyone done this? 6. If it is the inverters, have them repaired or select another product. 7. If I am confident that power quality is adequate, mute the UPS and ignore it. I will let you know how this progresses because I think there is interest and others have experienced similar problems. William <image001.jpg> Lic 773985 millersolar.com 805-438-5600
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