Hi Bob, I run into this issue nearly every week and the solution is the same every time: install a small dedicated inverter. CPAP machines and cell phone chargers work just fine with modified square wave inverters but for only $100 you can have a 300 watt sine wave inverter. I'd recommend sine wave since many small load items like battery chargers, electric blanket control, electric toothbrush, etc., fail with MSW inverters.
Contact me off list if you don't have a resource for small 12, 24 and 48 volt inverters. Larry Crutcher Starlight Solar Power Systems (928) 342-9103 Mailing Address: 11881 S. Fortuna Road, #210 Yuma, AZ 85367 Retail Store & Shipping Address: 2998 Shari Ave. Yuma, Az 85365 ----- Original Message ----- From: bob To: 'RE-wrenches' Sent: Tuesday, May 11, 2010 8:58 AM Subject: [RE-wrenches] Tiny load problem I am sizing a system that will have dual inverters to shorten generator charging in the winter and enough solar to charge the rest of the time. Here's the problem, the inverter will not be able to get into sleep mode at night. There are 2 cell chargers and a "cpap" machine having to run all night. It only totals 26 watts, has anyone found a better way to do this without having to keep an inverter awake to produce 26 watts? I would like to dedicate a Morningstar 300 watt inverter for the job but the system is 24 volts and Morningstar has no plans to make one in 24 volts. Anyone got any other ideas, or am I best to just deal with it? Thanks, Bob
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