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Using 1000w inverter to charge portable power station...

Discussion in 'Technical Chat' started by robmypro, Mar 25, 2022.

  1. Mar 25, 2022 at 10:30 AM
    #1
    robmypro

    robmypro [OP] Member

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    I am going on a two week camping trip this summer and will be at a few campgrounds for 3 days. I am running the Dometic 55IM and have been doing some testing. I have an EcoFlow 1300 which has fast charge capabilities (up to 1100W), assuming plugged into AC. My thought it is run a 1000 watt 12v DC to 120v AC inverter, so I can charge up the EcoFlow within 1-2 hours while driving between campgrounds.

    I am looking at something like this...

    https://www.amazon.com/Renogy-1000W...a9c995&pd_rd_wg=NkWV8&pd_rd_i=B0892SYKHZ&th=1

    With 1000W the EcoFlow will charge fast, instead of using the stock 100w charging from the DC outlet of the truck, which will take 10 times longer.

    Here are my questions...

    1. I have an AGM battery and will be getting the ECU upgrade (3rd gen 2021 TRD Pro) to increase the volts. I don't think the system will struggle to output 1000W while driving, but just wanted to confirm.

    2. Mounting. I would like to mount the inverter next to the truck battery in the engine compartment, but that means I need to run the AC cord into the passenger compartment, most likely in the back seat. Then I would just connect the Dometic to the bed AC outlet, which should be fine at 100W while driving. Then I would move the EcoFlow to the back seat, and charge it up. Does this sound like a good mounting plan?

    3. What AC cord would I need to use to connect the AC output from the inverter to the AC input of the EcoFlow? Anything special other than an outside grounded extension cord? SJO maybe?

    Thanks guys.
     
  2. Mar 25, 2022 at 11:42 AM
    #2
    TerraNerva

    TerraNerva Well-Known Member

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    This and That
    That's a lot of inefficiency going from DC to AC to DC. Have you considered solar panels or a second battery? If you choose to go this route, I would see what the mfg recommended wire gauge is and consider increasing that size by one when you take into account the distance for full load, not necessarily what your load is. Be super careful making secure connections and isolation to avoid fire risk. Floating grounds are no joke when running AC on a DC system in a mobile application, but it can be done safely. One bad ground or positive short will ruin your day. I don't know what the Dometic pulls, but seems like there are safer, cheaper, and more efficient options if your load is just a 12v fridge.
     
  3. Mar 25, 2022 at 11:52 AM
    #3
    Rock Lobster

    Rock Lobster Thread Derailer

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    I have to agree. An inverter is a bad idea.

    For that price, look into this instead:

    This little panel will recharge my 120Ah camper battery, an average sunny day with a tree or two has put anywhere from 500 to over 900w back into my system, from experience. It can easily charge your ~100 Ah bank.

    https://www.amazon.com/dp/B09RZP6X4D?_encoding=UTF8
     
    robmypro [OP] likes this.
  4. Mar 25, 2022 at 3:21 PM
    #4
    robmypro

    robmypro [OP] Member

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    Thanks for the help! Yeah, i have considered solar and gave the AGM battery. I would prefer not to go an inverter, so maybe i will spend more time looking for additional options.
     
  5. Mar 25, 2022 at 7:32 PM
    #5
    notrouble

    notrouble Well-Known Member

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    1000 watts being powered by a 12 volt system is at least 85 amps! That is some thick cables and usually a pretty inefficient system (so actual amps even greater.)
     
  6. Mar 26, 2022 at 5:09 AM
    #6
    JasonT87

    JasonT87 Well-Known Member

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    You’re wanting to install a 12v inverter to charge an Ecoflow 10x faster, to be able to power a 12v fridge? That’s an expensive way to do that lol. Why not just power the fridge direct off the starter battery and use a small solar panel to trickle charge the battery during the day? Seem like it would save you money and headache in the short and long run.
     
    robmypro [OP] likes this.
  7. Mar 27, 2022 at 5:58 PM
    #7
    robmypro

    robmypro [OP] Member

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    Hey guys i like the solar panel trickle charger approach. Going to go that direction. Thanks for the help!
     
    Rock Lobster likes this.
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