Forum Discussion

Naio's avatar
Naio
Explorer II
Mar 01, 2015

Why won't my inverter put out?

I feel there should be a 'That's what she said' joke in here somewhere...

I booked a camping site that I thought had hookups, but when I got here: no hookups.

I needed more juice than my house battery could comfortable provide, so I tried out the wise advice of folks on the forum, and connected my inverter to my van battery, with engine running.

This worked fine for powering my 30amp charger (specs)plus a 75-watt light bulb, but when I added a power strip containing phone charger, laptop charger, and heated mattress pad the inverter made an alarm noise.

It also made the alarm when I plugged in ONLY my freezer, which claims to use 67 watts (specs)

The inverter has no markings whatsoever indicating its specs, but I think it may be this one. actually, I thought it was 1500 continuous, but there's not currently one on the HF site like that, that looks like mine. Mine does have little covers over the outlets, which the pictured one does not.

My frozen food is melting.

Oh, and it's not the cord connecting inverter to battery. I tried a different one, this time running only the 75 watt light, phone charger, laptop charger, and heated mattress pad. It did fine for about 15 minutes, then made the alarm. I unplugged the light and it was ok for another 20 mins or so, then alarm went off I shut everything off, restarted, no alarm yet... Note that the inverter has an internal cooling fan, which comes on occasionally but was never on when it made the alarm.

Thanks for any suggestions on what to try next with this inverter, or how to preserve my melting food!

93 Replies

  • Low battery voltage to invertor, alternator can not keep up with engine idling. You may fry the alternator as well.
  • RoyB's avatar
    RoyB
    Explorer II
    I think it is time to get 5-day ice chest and ice from local WALMART or LOWES...

    Hard to make comments without knowing mdl numbers... All INVERTERS are 12VDC power hungry... A 1500WATT INVERTER will draw around 120AMPS from your battery if fully loaded down. i.e. A typical single GP24 Trojan 24TMX deep cycle battery will only produce 12VDC @ 75AMPs for 36 minutes according to this google image spec sheet.


    Sounds like to me you will have a dead truck start battery soon. Then what....

    Rule number ONE for me is never ever mess with the truck start battery system - This is the only way to get home on... We always test things out at home sitting in the driveway. A heavy load like this is would also be very hard on your truck ALTERNATOR system with the motor running. You sure don't want to blow that on the road.

    Maybe some other campers there can help you out...

    Good luck...
    Roy Ken

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