Thread Tools Display Modes
Old 04-01-2015, 04:54 PM   #1
Junior Member
Join Date: Jul 2011
Posts: 19
Generator controller and hybrid inverter?

I wonder if this can be done in a Sunseeker 2290s:

1: Replace the converter with a Magnum Energy MSH3012-M inverter, and move all house power circuits to it. This guarantees that all power coming in is at 120 volts. If there is a brownout at a campground, the inverter will sense it and draw from the batteries to make up for the lost voltage.

2: Add a generator controller. This is used so that if the batteries fall below 60% charge, the generator will fire up and run until they are at 90% charge.

3: Add a Progressive Industries 30 amp EMS (HW-30C model) hardwired in, as protection against miswires, and 240 volt dryer outlets.

Magnum Energy seems to have the best system, with a control panel, generator controller, battery monitor and temperature sensor, and the inverter. However, the inverter by itself coupled with an Onan Energy Command EC-30W would do almost as well.

The advantage of this setup is threefold. The batteries will not be drained dry (assuming no quiet hours and the genset has fuel), one can use electrical appliances without worry about turning on and off the generator, and there isn't a worry about over or under voltage destroying appliances. Finally, the EMS keeps the dryer outlets from destroying the vehicle's electrical system.

Has anyone done this as a mod?

mlts22 is offline   Reply With Quote
Old 04-02-2015, 08:13 PM   #2
bclemens's Avatar
Join Date: May 2011
Location: Elkhart, IN
Posts: 8,309
sounds expensive.

PLEASE do not send questions via Private Message. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only. Our owners manuals are available online and via iPhone/Android Apps.
bclemens is offline   Reply With Quote
Old 04-10-2015, 12:32 PM   #3
Junior Member
Join Date: Jul 2011
Posts: 19
It is not cheap, around $3000. However, I'm looking at doing this setup because part of what I may be buying is some rural land with an off-grid cabin on it. In the summer, there is a 7500 or so BTU A/C, which is easily powered by a 15 amp connection. I can just plug that into the motorhome. When the batteries hit their low water mark, the genset comes on, and when the A/C is not needed for the night, the genset charges the batteries and shuts off automatically.

I might do a subset of this. At the minimum, an Onan EC-30W controller which is about $524 from PPL. This way, I have protection from the batteries getting drawn too low, as well as the ability to store the rig and have the generator exercise itself every so often.
mlts22 is offline   Reply With Quote
Old 04-10-2015, 03:43 PM   #4
Senior Member
Join Date: Jun 2013
Posts: 188
My only comment is their is energy loss for each step and its not the most efficient.

120 volt AC -> 12 v DC-> battery bank absorption-> 12 volt DC -> 120 volt AC appliances.

For off the grid, go solar and try to keep everything DC.
2011 Sunseeker 3170DS - 30,000 miles explored
funfinder5 is offline   Reply With Quote

controller, generator, hybrid, inverter

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 06:50 PM.