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Old 11-13-2019, 07:24 PM   #1
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Winter Storage

We have a 2017 Winnebago Forza 36G with a Magnum Energy MS2000 3 Stage Inverter. We store this coach in an attached garage without heat. We would like to keep it plugged in this winter and plan to turn off both the chassis and coach battery switches. Should we also turn off the inverter? Thank you.
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Old 11-13-2019, 09:04 PM   #2
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Why plug it in if you are going to turn off the batteries? Are you planning to heat it with electric heaters?

If my coach was going to be plugged in during storage, I would leave the house batteries turned on and leave the inverter on to keep them topped off. Discharged lead acid batteries are more prone to freezing than charged batteries. It would have to get mighty cold in your garage, mine lives outside in Michigan.

If you decide to turn off the house batteries, turn off the inverter also. Without the batteries to act as a buffer, your DC systems can see voltage spikes running only from the inverters charging circuit.
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Old 11-13-2019, 10:11 PM   #3
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Winter Storage

Thank you for the reply. I guess I should have stated what my Operators Manual has to say about "Storage".



When placing the RV into storage, it is recommended that you perform the following:
1. Connect AC power
2. Verify the inverter is switched OFF
3. Switch OFF all unnecessary AC & DC
loads.


Not knowing much of anything about electric I am looking for advise as it pertains to what the book is telling me.
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Old 11-13-2019, 11:17 PM   #4
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The 'inverter' they are talking about is probably part of your 'converter', aka 'charger'. The Charger converts 120 Vac to 12-15 Vdc to charge your batteries. (Sadly, they don't always charger the chassis batteries).

An 'Inverter' inverts 12 volt battery power to 120 volt AC to power some AC only devices on your RV. The shore power powers all the rest. These aren't needed while you're parked so they instruct you to turn it off when in storage. The hard part is switching Off all the AC & DC loads because you invariably miss something. The main battery switch should disconnect most if not all DC loads, and switching Off the inverter will eliminate the inverter as a load. You can switch off all the Circuit Breakers to be sure you get all of the rest of the AC loads disconnected.

Give that a try. Personally, I'd just disconnect the battery bank grounds and be done with it.
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Old 11-14-2019, 05:59 AM   #5
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Quote:
Originally Posted by gmatti View Post
Thank you for the reply. I guess I should have stated what my Operators Manual has to say about "Storage".



When placing the RV into storage, it is recommended that you perform the following:
1. Connect AC power
2. Verify the inverter is switched OFF
3. Switch OFF all unnecessary AC & DC
loads.


Not knowing much of anything about electric I am looking for advise as it pertains to what the book is telling me.
Ok, that gives more context.

The manual is telling you to turn off DC loads like your refrigerator, furnace, TVs, antennae boosters, etc.

Your Magnum MS2000 is an inverter and a charger, so your coach won't have a separate converter. On the Magnum units, you can turn off the inverter function but leave the charger on. You may have a control panel with buttons and lights for the charger and the inverter function, or you may just have a switch to control the inverter and not be able to turn off the charger.

Turning the inverter off when not in use is good practice. When turned on it draws a small amount from the battery even when no AC devices are being used.

As far as your chassis battery. Some coaches will charge the chassis battery when plugged into shore power, some will not. If yours charges the chassis battery, I would leave it connected.
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