UL ratings would be nice. My rating is based on that the product will work at rated output for 100% of the time and maintain the proper output voltage at full rated current and not overheat, stop working, and continue to meet Rating Voltage and Current specs. So far I have used it to drive 100 watts RMS Class D amplifier and monitored the Output voltage. I will use a 5 ohm 200 watt power resistor on a large Heatsink with fans to run a high output test and monitor the temperature of the case and the output voltage and see how long it take to stabilize and then continue test for 6 more hours. If it passed this test I will increase my rating to 5 stars
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