Go Back   Keystone RV Forums > Keystone Tech Forums > Technical Corner
Click Here to Login


Thread Tools Display Modes
Old 05-17-2019, 07:25 AM   #1
Junior Member
Join Date: Jan 2019
Location: Lakewood
Posts: 1
Electrical Additions

Hi! I'm making some additions to my rig (2007 Keystone Montana Mountaineer), and would like some input (from someone with more electrical knowledge than me!).

Basically, I'm adding a battery box/bank with 4-6V batteries, with a selector switch, and keeping the original battery as a backup. In addition, I'm adding a 3000W power inverter, and a portable solar panel.

Here's a few notes:
--I've hardwired the solar connector onto my batteries as shown in the diagram, but only plug it into the panel when parked, so its not hot all the time.
--To keep it simpler for me right now, rather than wiring the inverter into the coach's fuse box panel, I plan on running my 50A cable from the coach, with appropriate 50-30 and 30-20 amp downsizers, and plugging that into the inverter. I realize I can't run my AC on that, and that's fine, I wouldn't have the battery power for that anyway.
--Provided my assumptions and the diagram are accurate, I believe the last thing that I need to do is to wire a kill switch onto my converter, so as not to create a power loop that drains the batteries.

So basically, I'm looking for advice on 3 things...does the diagram look sound, or are there any recommendations? Secondly, where/how should I wire a kill switch for the converter? Killing the breaker switch for it is not an option, as the converter is on the same breaker as the power outlets in the rig. Is it as simple as wiring a switch into the point on the drawing with the 3 question marks, and turning it off there? And lastly, should I be able to just charge the backup battery by setting the marine selector switch to setting 2 while the converter is on?

Any help is greatly appreciated! Thank you!

Attached Files
File Type: pdf Diagram.pdf (70.7 KB, 18 views)

GypsyFamilyRV is offline   Reply With Quote
Old 05-17-2019, 08:03 AM   #2
Logan X
Senior Member
Logan X's Avatar
Join Date: Oct 2018
Location: Southern California
Posts: 368
I was recently researching similar things. I found this article on four ways to install an inverter. I found the information to be very helpful. The method that looked the best to me was wiring a relay from the inverter to the converter so when the inverter goes on the relay automatically shuts off the converter. The article does a pretty good job explaining it.

What I have decided on doing is installing the Victron multi plus. It is an inverter and charger/converter. It will replace my oem charger.

I hope it works out for you, let us know what you did and how it goes.

EDIT-your 100 watt solar panel probably won’t charge a 4 battery bank very quickly or it may not be able to fully charge it.

2017 F250 6.7 powerstroke FX4 crew cab
2016 Hideout 24BHSWE (27 foot TT)
Logan X is offline   Reply With Quote
Old 05-17-2019, 10:27 AM   #3
Site Team
hankpage's Avatar
Join Date: Jun 2009
Location: Venice, FL
Posts: 4,837
You can replace the CON/RECPT breaker with a piggy-back/ tandem breaker of the same amperage and just turn off the converter when needed.
Hank & Lynn
2007 Cougar 290RKS, E-Z Flex, 16" XPS RIBs ( SOLD .. Gonna miss her ... looking for new 5r)
2004.5 Dodge 2500 QC, LB, 5.9HO, WestTach gauges, Ride-Rite
hankpage is offline   Reply With Quote
Old 05-17-2019, 10:57 AM   #4
Join Date: Aug 2018
Location: Vacaville
Posts: 73
It looks like your inverter is trying to run your on-board converter/charger. It may try to charge the same batteries feeding it? You may need to de-couple the charging portion or only have your inverter run a few chosen receptacles.
1996 Palomino Pop up (sold)
2005 Attitude FK19 Toyhauler (sold)
2013 Premier 22RBPR
2014 Ram 1500 Hemi 4x4
2014 Beta 520RS Dual Sport
Love camping, homebrewing, and dirt bikes!
CampNBrew2 is offline   Reply With Quote
Old 05-17-2019, 12:36 PM   #5
Site Team
chuckster57's Avatar
Join Date: Jul 2014
Location: Modesto
Posts: 8,866
Is your inverter also a charger? If so I can tell you how to make the install very simple.

Your going to need to keep the inverter as close to the battery bank as possible, or be prepared to run some LARGE cables from the battery to the inverter.

2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.

Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
chuckster57 is offline   Reply With Quote


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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV® is a registered trademark of the Keystone RV Company.

All times are GMT -8. The time now is 01:58 AM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.