Forum Discussion

Almot's avatar
Almot
Explorer III
Jun 03, 2023

Voltage protector 110V?

Not an auto-transformer, just an auto-disconnect when it drops below 90 or rises above 140. Limits are adjustable to >90 or <140 accordingly, i.e. to a narrow-er range if needed. Recovery voltage is also adjusted. Brown-outs can do a number on 110V devices when grid power resumes at 80-90 and stays like this for some time.

There is a plug-in single-receptacle protector on Amazon: $24, 15A, 2200W. 15A @110V is not 2200W, but close.

Or a whole-trailer protector on Aliexpress, I like this idea better: $14 with shipping, 40A. The usual doubt with this source - will it work as it should. Don't see it on Amazon.

Any suggestions?
  • BB_TX's avatar
    BB_TX
    Nomad
    Jun 03, 2023
    Power companies today supply power at 120 vac +/- 5%. So you should see anywhere from 114 vac to 126 vac at your outlets if you are receiving good power. Much below 110 vac is low. 110 vac was an old standard that was raised to 120 vac many years ago.
  • AllegroD's avatar
    AllegroD
    Nomad
    Jun 03, 2023
    Are you only looking to protect one item or the whole rig? Why as low as 90v?
  • Bobbo's avatar
    Bobbo
    Explorer II
    Jun 03, 2023
    In this area you definitely get what you pay for. I would spring for a EMS-HW30C or a EMS-HW50C depending on whether you have a 30 amp or 50 amp RV. It costs more, sure, but the extra protection is worth it.

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