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Old 12-31-2021, 12:02 PM   #1
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Using shore power during Battery bay Refurbish

This previous posts on this forum have been valuable in leading me to complete the battery bay clean and battery replacement. I have a 2015 Dutchstar all electric coach. The refurbish may take me a few days. Is there a way to use shore power safely during the time the batteries have been removed. If so, I知 looking for the correct procedure to power up the coach during this project.

Thanks in advance.
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Old 12-31-2021, 12:08 PM   #2
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I would read the owners manual for your converter or inverter/charger. It should say if it needs the battery in the circuit. Even if you leave one small 12 VDC battery in there, that would be enough.


Take a picture of the wiring before disconnecting.


Also, read your inverter/charger owners manual to see if they want the negative or positive wire removed first. No "one answer" applies to all brands.
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Old 12-31-2021, 01:39 PM   #3
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An inverter/charger will not power things without a battery, so no 12 volt items will work.
Jumper cables to a 12 volt, or pair of 6 volt batteries on the floor will work. Wrap the cables ends up so no shorts.
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Old 12-31-2021, 02:59 PM   #4
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I知 ok without any 12 volt power during the refurbishment process but would like still the electric refrigerator dining time frame. I知 not sure the correct steps to take while removing the batteries in order to power up the 110 volt system.
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Old 12-31-2021, 05:59 PM   #5
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The invertor/charger is not a capacitor, it is a relay. To be safe, disconnect from shore power. Remove negative battery cables FIRST, connect negative cables LAST. As mentioned, take photos first for correct reassembly
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Old 12-31-2021, 06:08 PM   #6
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The invertor/charger is not a capacitor, it is a relay. To be safe, disconnect from shore power. Remove negative battery cables FIRST, connect negative cables LAST. As mentioned, take photos first for correct reassembly
If its a Magnum inverter/charger, they recommend the opposite. Remove the positive cable first.
Doing that protects othe magnum equipment from becoming the ground source and burning out.
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Old 12-31-2021, 06:23 PM   #7
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Originally Posted by Baja Fun View Post
I知 ok without any 12 volt power during the refurbishment process but would like still the electric refrigerator dining time frame. I知 not sure the correct steps to take while removing the batteries in order to power up the 110 volt system.
I would bet you do need 12 volt power. Anything with a control panel will need 12 volt power. Things like the furnace, or AC units and maybe the inverter/converter.
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Old 01-01-2022, 06:27 AM   #8
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Quote:
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If its a Magnum inverter/charger, they recommend the opposite. Remove the positive cable first.
Doing that protects othe magnum equipment from becoming the ground source and burning out.
Twinboat has good advice both with this post and the earlier one. I doubt that your inverter/charger or whatever you have was designed to operate without being connected to a 12v battery. My Freedom 458 manual says to connect negative battery terminal to the inverter first then connect positive, so I'd imaging the reverse is true for disconnecting. My manual is silent regarding trying to operate it without batteries connected.
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Old 01-02-2022, 08:08 AM   #9
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If all you are worried about is the refridgerator, just run an extension cord to it from the outside and plug in there.
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Old 01-02-2022, 09:02 AM   #10
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Quote:
Originally Posted by Fast E View Post
The invertor/charger is not a capacitor, it is a relay. To be safe, disconnect from shore power. Remove negative battery cables FIRST, connect negative cables LAST. As mentioned, take photos first for correct reassembly
Above is often repeated as the safest and preferred method.
The problem is it is incorrect if owners have a Magnum inverter.
The other problem is posters promoting this sequence do not qualify it and often are adamant that it is correct for all situations... when in fact "it depends".

Caution and reading your inverter manual or contacting the mfg is ALWAYS preferred to taking inet advice as factual.
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Old 01-02-2022, 03:26 PM   #11
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My WFCO 8735 converter / charger works fine without a battery connected. That is what "converter" means.

Insulate the end of the loose positive cable while converter is "on". It will be "hot".

As posted above, see instruction manual for your make and model charger.
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