Powerstar Upg Inverter Test
inefficient to keep an inverter operating all night just to power a phone answering machine or other small 120 vac load. The UPG inverter is going to change the way systems are designed and operated.
Technical Testing
After such a successful user test, we couldn't wait to stick it to this inverter. Bob-O Schultze came to Home Power central to witness the event. We lined up all the monster loads, broke out the two Fluke 87 meters, and proceeded. We used a 0.5% precision shunt (50 mV. at 200 Amperes) in series with the battery/inverter cable. What follows below is a spreadsheet showing the raw data of an afternoon's rigorous testing.
Notes on the data
Watts are calculated fields for both 12 VDC and 120 vac wattages. This was done by multiplying volts times amps. Efficiency is the output wattage divided by the input wattage. The hard facts are in the spreadsheet, no editorial verbiage here!
Conclusions from the data and tech tests
This is one fine inverter. It powered up its rated output of 1300 watts. It survived overloading of 1500 Watts output for five minutes and thirty seconds, then it shut itself off. No damage. It survived overvoltage on its input. Here I disconnected the battery and left the inverter on line with the open circuit PV array. The voltage went to over 19 VDC and the UPG shut itself off with no damage. The low voltage shut down function works at 10.5 VDC as specified.
INPUT DATA OUTPUT DATA
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