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Open Roads Forum  >  Tech Issues

 > Ultimate power inverter/charger question

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Crushedstang50

Wichita, KS

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Posted: 01/11/20 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

Hello all!
I have a question for all of you more experienced than I in the RV area.
I just picked up a ultimate power 3000 watt pure sine inverter/charger (up12/3000pcul) for just a stupid cheap amount. I was researching 4 stage converter/chargers when I ran across it.
I know it is way more inverter than I need for my 30amp outback 23rs but at the price I could not pass it up with a 4 stage charger built in.
My question is... with it can't I just bypass my stock converter/charger. Wire the new inverter to the shore power line in. Then hard wire the output from the inverter/charger back to the breaker panel?
And of course my rig batteries to the 12v side of the inverter/charger.
Thanks in advance!
Derek


2007 Keystone Outback 23rs
2016 Ford F150 Platinum. Max tow, 6.5 bed, 3.5 ecoboost

pianotuna

Regina, SK, Canada

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Posted: 01/11/20 12:27pm Link  |  Quote  |  Print  |  Notify Moderator

Most of us just leave the existing converter in place but disconnected.

Why?

1. back up charger
2. wire size to a 3000 watt inverter/charger is going to be huge, compared to the oem converter.
3. location needs to be as close to the battery bank as possible, without being in the same compartment.

I chose to use plugs so I can bypass the inverter/charger if need be.

Why?

Because some GFI outlets "hate" the inverter charger and trip more or less instantly.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

2oldman

New Mexico

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Posted: 01/11/20 12:29pm Link  |  Quote  |  Print  |  Notify Moderator

It's imperative you turn off your existing converter. If not, your inverter will be running it, trying to charge the batteries while inverting from same.

Be sure to disconnect the 120v side.

Crushedstang50

Wichita, KS

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Posted: 01/11/20 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

Yes my plan was to just disconnect the stock coverter/charger. Then run the 120v wire from the shore power plug up to the inverter/charger in the front compartment so it was close to the battery bank. Then run the output 120v back to the breaker panel. If that would work how big of 120v cable do you think would be safe? To and from the inverter/charger.

BFL13

Victoria, BC

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Posted: 01/11/20 12:49pm Link  |  Quote  |  Print  |  Notify Moderator

https://ultimatepower.com/products/inver........s/3000w-pure-sine-inverter-charger-pcul/

Yes, mount the new IC close to the battery bank with new short fat wires to the DC input/charger output side to the battery bank. Leave the existing battery to DC converter/DC fuse panel wires in place so they still run the 12v side of your rig.

Unplug or disconnect the 120v to the existing converter and leave it there as a back up. Plus when you sell that rig, you can take your IC to the next rig and the new owner still gets the OEM converter.

There are several ways to set up the IC inverter part to your rig's 120v. Whatever the instructions say, or a variation of that.

* This post was edited 01/11/20 12:57pm by BFL13 *


1. 1991 Oakland 28DB Class C
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2oldman

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Posted: 01/11/20 12:50pm Link  |  Quote  |  Print  |  Notify Moderator

I use standard 12/3 household Romex.

Crushedstang50

Wichita, KS

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Posted: 01/11/20 01:02pm Link  |  Quote  |  Print  |  Notify Moderator

Wonderful! Guess I have me a little project to add to the schedule!
Thank you all for the input!

theoldwizard1

SE MI

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Posted: 01/11/20 01:29pm Link  |  Quote  |  Print  |  Notify Moderator

Crushedstang50 wrote:

Hello all!
My question is... with it can't I just bypass my stock converter/charger.

YES ! Just be sure that you are not back-feeding the charger from the inverter. Many (most?) charger/inverters have a built in automatic transfer switch to prevent this from happening.

Lwiddis

Mono Basin National Forest Scenic Area

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Posted: 01/11/20 01:59pm Link  |  Quote  |  Print  |  Notify Moderator

You won’t need that little bit of storage space ever?


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


pianotuna

Regina, SK, Canada

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Posted: 01/11/20 02:46pm Link  |  Quote  |  Print  |  Notify Moderator

10 wire is what I used. But you are simply plugging in the shore power cord to the inverter.

I ran #10 to a 30 amp female outlet in the "mouse hole". I shortened the OEM cord to 5 feet, and put on a male plug. I saved the rest of the OEM cord to make an extension for shore power use.

Crushedstang50 wrote:

If that would work how big of 120v cable do you think would be safe? To and from the inverter/charger.


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