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Originally Posted by garry
Air conditioners in particular will suffer from low voltage. The problem is as the voltage goes down the fan and compressor require more amps and the more amps the hotter they run so in effect low voltage (below 108 VAC) can burn out your AC.
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I don't believe that's true, though people who sell A/Cs say it is (because they want someone else to blame for the short product life), and people who sell surge protectors say it is (because they want to sell surge protectors).
It is true that the amp draw will increase slightly as the voltage drops. Below a certain point, the thermal limit will trip and the A/C will shut off.
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Voltage surge is very bad for electronic components lightning is a good example you don't have to have a direct hit to destroy everything in you RV or stick house. Today many high end electronic devices have MOV's built in to protect from surges but to be truly protected you need a surge protection device for the RV.
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No surge protection device can protect against an extremely large voltage spike.
Small spikes do not affect electronics.
The question then is whether there are enough of the medium sized spikes that the "surge protector" can guard against to justify its purchase price, weight, and the hassle of using it.