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Old 10-28-2013, 06:31 PM   #29
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Lifeline GPL-6CT Batteries in 2010 Interstate

This is a picture of the installed batteries. Really easy. Used the existing cables (cut and terminated the positive post clamp with a ring terminal) and added one 6" cable to connect the two batteries in series. The initial post on this forum took longer to write than the install took to accomplish.
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Old 10-28-2013, 06:41 PM   #30
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Yes we used the existing cables, had to remove one (not needed in series) and add a little six inch one to connect the two batteries in series.
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Old 10-28-2013, 10:00 PM   #31
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Lifeline GPL-6CT Batteries in 2010 Interstate

Quote:
Originally Posted by Rain View Post
This is a picture of the installed batteries. Really easy. Used the existing cables (cut and terminated the positive post clamp with a ring terminal) and added one 6" cable to connect the two batteries in series. The initial post on this forum took longer to write than the install took to accomplish.
Thanks Rain - nice write-up. Looks like your picture didn't make it in the post. I've found that uploading pictures to this forum can be frustrating at times.

Wish I could get those tall GPL-6CT batteries into my 2013 Ext Lounge's battery box, but they are just too tall. They are 3 inches taller than the GPL-4CT. The Ext Lounge models have a different battery box that the standard lounge models.
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Old 10-29-2013, 07:19 AM   #32
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Quote:
Originally Posted by Boxster1971;
Wish I could get those tall GPL-6CT batteries into my 2013 Ext Lounge's battery box, but they are just too tall. They are 3 inches taller than the GPL-4CT. The Ext Lounge models have a different battery box that the standard lounge models.
I don't have any extra height in my 2012 Lounge (non-extended) either. There must be variations in the battery box design from year to year as well as ext to non-ext.
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Old 10-29-2013, 12:57 PM   #33
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Don't forget that you can place Lifelines in any orientation except upside down. That might increase your mounting options.

I regularly place them on their sides in low clearance situations.
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Old 10-29-2013, 06:51 PM   #34
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Don't forget that you can place Lifelines in any orientation except upside down. That might increase your mounting options.

I regularly place them on their sides in low clearance situations.
Great tip Lew! I think a side mount would make it easier to mount some Lifeline GPL-4CTs under my Interstate just behind the rear tires.
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Old 10-30-2013, 09:38 AM   #35
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Our battery Box fit the taller GPL-6CT batteries with the cover. However, since the batteries are sealed there is no need to put the cover back on the box. We considered doing that in lieu of using a piece of plywood inside the cover box to protect from shorts from the cover itself. You may want to see if the batteries fit in the box without the cover. That's actually what the supplier suggested when we used their "dummy" battery for a fit check and they indicated it was the most common solution for the taller batteries. We had a piece of plywood handy so we chose the route of using the cover but without the cover there was an additional 3 inches available for a total of 6 inches. The 300AH of the GPL-6CT's versus the 220AH of the GPL-4CT's (much less the original 160AH batteries) made the change and price truly worth it. I'd put them in without the cover in a heartbeat. In fact, we would have put in the GPL-L16T 400AH batteries without the cover but the supplier had no dummy and it was too close in length to ensure fitment. In retrospect I should have made my own dummy but we love the 300AH upgrade.
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Old 10-30-2013, 12:11 PM   #36
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One concern with leaving the cover off the battery box is having the terminals exposed. There is a lot of stored energy in two 300Ah batteries! Having a metal tool fall across the terminals could create a very violent event!
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Old 10-31-2013, 11:11 AM   #37
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Indeed, we used thick rubber boots on the connections which eliminates that hazard. The reinstall of the cover was a bonus.
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Old 10-31-2013, 11:15 AM   #38
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Also, I believe you have the same battery box which would indicate you can use the GPL-6CT's with the plywood resulting in a very clean, easy and safe install should you chose to upgrade. Unfortunately I've had no luck posting pictures.
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Old 10-31-2013, 11:28 AM   #39
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Also, I believe you have the same battery box which would indicate you can use the GPL-6CT's with the plywood resulting in a very clean, easy and safe install should you chose to upgrade. Unfortunately I've had no luck posting pictures.
In place of plywood, you might consider using a small plastic cutting board, which will be thinner and not subject to rot or other degradation over time.
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Old 04-20-2014, 01:26 AM   #40
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Thumbs up GPL-6CT's installed today with 100W solar and solenoid switch added

Thanks, Interstate guys, for posting your experiences with coach battery replacement and solar upgrades.

Today I got two Lifeline GPL-6CT's stuffed into the battery box of my Lounge model. It was a bit of a squeeze, but they fit, and now I have 300Ah ready to go. The old Discover EV24-A-A batteries wouldn't hold any charge at all after just 22 months since we bought the rig new. We were pretty rough on them, though, running them down to zip a number of times.

I also installed a second propane solenoid switch in the control panel area, and added a 100W solar panel from AM Solar on the rear roof (ditched that crazy round digital TV antenna - never got more than one or two oddball stations even when parked in large cities!)

Just a couple notes for those considering doing these same ideas floating around for us folks who like to roll 'unplugged':

1) the second cutoff switch for propane - easy access to wire '68' is available in that thick bundle under the curbside cup holder - no need to grovel around under your rig (see photo). Just find the red wire marked with the number 68 - cut it and connect the wires for your switch. Route the wires up and around like others have done and put in a nice lighted rocker switch next to the water heater switches. Radio Shack has a nice switch for $5 - just add a ground wire from the switch to a bare metal lug you add to the Sprinter metal wall behind the control panel and you have a nice indicator light to tell you your propane is on and flowing.

2) the GPL-6CT's - I guess I'm one of the guys blessed with a deeper battery box, since I made them fit. However, I don't know what folks are saying about adding a short cable to connect the two 6V Lifelines in series - there is more than enough cable in that battery box when you change from parallel to series connection! I ended up with several extra cable pieces of red conductors. Just orient one battery opposite the other and you can connect them in series with the cables from the factory if you do it right. You will need to cut off the big 'car battery' terminal and replace it with a lug snitched from the other red cable you won't need.

I removed the bottommost plywood pad (from the battery box) to squeeze out another half-inch, and raised the battery cover lid up an inch or so by drilling out the two rivets attaching the lid hinge and re-riveting the hinge to be unfolded in the latched position. That allowed me to still use the factory battery box cover (adjust the latch a little) and it all fits just nicely under the seat. I didn't bother with either of the battery hold-downs; just stuffed in some closed cell foam blocks from the battery shipping cartons to make the batteries stay nice and snug in their little house.

Speaking of batteries, I received a great price and great customer service from Marc at Centex in Texas. Authorized Dealer Lifeline GPL-6CT Battery $ 360.00

3) added solar - Roger at AM Solar in Oregon was a great help, and now I have an extra 100W (added to the factory 50W panel) to get my Lifeline's charged. I wouldn't recommend digging out all the roof goop to get at the wire bundle (the wires for the power awning, backup camera, TV coax), but instead drill a new hole for solar panel conductors with suitable weather seal. I dug out that stuff and routed the new 10AWG wire though the same batch of wiring, but it was a hassle. The wires run down the curbside rear pillar of the van just nicely, coming out near the battery box and into the wiring nerve center under the couch. Piece of cake to wire it in, since the factory solar panel wires are sitting there staring at you in the same area under the couch (yellow and green wires - yellow is labeled 'solar').
AM Solar included a 10AWG wiring kit with 15' of wire - I had to snip off just 6" of each - that worked out well. Goodbye to that goofy 'is that a satellite dish?' antenna that never worked well (yes, I switched on the booster. Anyone else get meager reception like we did?)


Thanks again to the many guys who forged ahead before me and shared their hard-won wisdom....
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Old 04-20-2014, 02:26 PM   #41
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Welcome to the Airforums. Thanks for the write-up.

My antenna works fine. Wonder if the coax got crushed somewhere during fab?
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Old 04-20-2014, 06:03 PM   #42
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Thanks, Interstate guys, for posting your experiences with coach battery replacement and solar upgrades....

.... I also installed a second propane solenoid switch in the control panel area, and added a 100W solar panel from AM Solar on the rear roof (ditched that crazy round digital TV antenna - never got more than one or two oddball stations even when parked in large cities!) ......

Thanks again to the many guys who forged ahead before me and shared their hard-won wisdom....
I second the welcome to Airforums. I also get great reception with the Wineguard antenna installed by Airstream.

In addition to the thought of crushed coaxial cable mentioned by 73shark I have another suggestion.

Did you tune the TVs using channel search function in TVs setup menu?

I only mention this as it is something a lot of people forget about. I once parked next to a new monster 40 foot Class-A in a KOA park. After chatting with owner he complained the none of the four TV in his rig could get the local stations in Niagara Falls area. I showed him how to tune his TV and viola - he got over 40 local channels. For home TV you only tune them once on initial set-up but on a mobile platform they have to be tuned each time you move the coach.
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