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boatykg asked

Pheonix 12/2000 and Hair Dryers

Just installed a Phoenix 12/2000 replacing an old modified sine wave 1600watt, all powered by 3x110Ah yuasa sla batteries. My partners 1200w Babyliss hairdryer creates an overload shutdown. Any ideas why please? Thanks.

Phoenix Inverter
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2 Answers
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trip-tracks answered ·

I have found with some appliances, like hairdryers, the wattage is not the maximum wattage of the appliance, but the average. So, the thermostat turns on for say 1/10 sec, off for 1/10 sec you have a 50% duty cycle, however, the appliances draws 2400W maximum but the average is effectively 1200W. The maximum demand is enough to trip the inverter out on overload. I have verified this with a Multiplus 12/2000 using the VE.Bus tools in VE.Config.


cleanshot-2022-11-22-at-140959.jpg

Try measuring your maximum current draw with a multimeter that captures this to verify this is your problem, or try another 1200W appliance like a 2 slice toaster.



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riccardo-sala avatar image riccardo-sala commented ·

I have the same problem. My hair dryer at maximum power consumes 2100 watts but at minimum power it consumes an average of about 500 watts. I tried to power it with the Phoenix 12/1200 but after a few seconds it shuts down with the overload message. Thank you for your explanation!


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boatykg answered ·

Great answer. Thanks so much for your help.

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