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Old 02-25-2016, 02:05 PM   #15
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Simple fix with Blue Sea Systems 300 amp marine disconnect switch on the positive battery cable.

Plus, if your Lifelines have already been compromised, they won't hold charge regardless of what you do to them....... Short of Lifelines' recommended conditioning charge.


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Old 02-25-2016, 04:25 PM   #16
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With 400 watts of PV solar panels and a Blue Sky MPPT controller, combined with a 440AH battery upgrade my Interstate is now a go anywhere, stay anywhere camper that can also haul 6 people when needed.
440AH of battery????? Wow, which batteries and where? And are your front wheels off the ground sometimes?
I'm planning on getting Lew to upgrade me to 300AH; I'd love to have 440 but I wouldn't want to risk him getting a hernia!
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Old 02-25-2016, 04:56 PM   #17
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440AH of battery????? Wow, which batteries and where? And are your front wheels off the ground sometimes?
I'm planning on getting Lew to upgrade me to 300AH; I'd love to have 440 but I wouldn't want to risk him getting a hernia!
Better yet, where the heck did he hang 400watts of solar! There must be one trailing behind... .

I can't see how more than three could go up there. Any photos?
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Old 02-25-2016, 06:42 PM   #18
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Batt disconnect or remove the negative battery cables, all newer vehicles have parasite draws, my sisters honda sits 4 days, it won't start, so many electrical draws...
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Old 02-25-2016, 06:57 PM   #19
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We got creative with cardboard cut outs the size of the solar panels to try various positions for the panels. We removed the factory Winegard crackup antenna and replaced it with their Rayzar automatic antenna. That freed up an additional space so we were able to put five AM Solar GS-100 100 watt panels on the roof of our 2015 23D. Those panels are nominally about 20" x 40". The lithium battery can come in four 3.2 Vdc pieces with the total number of cells needed (i.e. each 3.2 Vdc cell is 100 amp-hours).

So for our 600 amp-hour battery, we had four 3.2 Vdc pieces with six cells for a total of 42 pounds per group. The assembled battery is now 168 pounds under the front sofa of the Classic.

The 300 amp hour lithium came fully assembled at 84 pounds and was the limit of my lifting abilities now. A 400 amp-hour lithium would weigh 112 pounds.
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Old 02-25-2016, 08:09 PM   #20
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Lemon Law – 2014.5 Airstream Interstate

Quote:
Originally Posted by UKDUDE View Post
440AH of battery????? Wow, which batteries and where? And are your front wheels off the ground sometimes?

I'm planning on getting Lew to upgrade me to 300AH; I'd love to have 440 but I wouldn't want to risk him getting a hernia!

I hung four Lifeline 6v GPL-4CTs behind the rear wheels. They are 64 lbs each and about the limit I can handle. I'll have to switch my iPhone for pictures.

Edit - pictures in next post.

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Old 02-25-2016, 08:25 PM   #21
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Lemon Law – 2014.5 Airstream Interstate

Here are the batteries under my van and a shot of the racks under construction. The last photo is a shot of my roof full of solar panels. I also upgraded to a 2000 watt Magnum inverter installed in place of the old battery box under the lounge seat.
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Old 02-25-2016, 09:02 PM   #22
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Lemon Law – 2014.5 Airstream Interstate

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Old 02-25-2016, 09:15 PM   #23
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Here are the batteries under my van and a shot of the racks under construction. The last photo is a shot of my roof full of solar panels. I also upgraded to a 2000 watt Magnum inverter installed in place of the old battery box under the lounge seat.
Very impressive, especially the cradle work. That's probably a very specialized build beyond the scope of most local RV engineers. Are they designed to hinge down as in the photo, or were just being installed at that point?
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Old 02-25-2016, 09:28 PM   #24
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Lemon law

Just an FYI. In two weeks loosing that small amount of battery power is negligible. When ny Interstate is fully charged at 12.8 within two weeks I'm down to 11.8, give or take. There are a number of power draws on those batteries. Unless they are totally disconnected they will drop. In my humble opinion you're lucky that the drop is so minuscule. Wanna trade?
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Old 02-26-2016, 07:02 AM   #25
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Just an FYI. In two weeks loosing that small amount of battery power is negligible. When ny Interstate is fully charged at 12.8 within two weeks I'm down to 11.8, give or take. There are a number of power draws on those batteries. Unless they are totally disconnected they will drop. In my humble opinion you're lucky that the drop is so minuscule. Wanna trade?
Minuscule.…..REALLY???? Your batteries won't be giving you much service if you let them get discharged to that point (11.8VDC) on a regular basis. According to the Lifeline Tech Manual, you are effectively dropping their capacity to close to 20%: http://lifelineb.wpengine.com/wp-con.../12/manual.pdf

Pg. 30 of this manual shows a chart for battery State of Charge (%SOC) vs battery open cell voltage. It lists 11.9VDC as having a 25% SOC and 11.8VDC is even lower.

You are effectively killing your batteries by allowing them to reach this low level as a matter of practice. There is another graph further back in their tech manual that shows the relationship between battery SOC and the number of charge cycles (battery life) that one can expect.

At a 50% SOC, they list 1000 charge cycles, at 25% SOC (75% depth of Discharge): 600 cycles and for a 75% SOC (25% depth of discharge): 2500 cycles.

Lifeline expects, by virtue of their 5 year warranty and repeated exhortations to not bring your batteries below the 50% level on a regular basis, that you will get that 1000 charge cycles from your batteries. Allowing them to go to 11.8 VDC will get you between 2-3 years (if that) from the batteries…..maybe
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Old 02-26-2016, 08:40 AM   #26
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As an aside, I like how Mike appears to have built his own wheel ramps. So far I have been using our Valterra stackers, and I like them and feel confident in their use, but I'd like a bit more loft for certain jobs. And top quality. The commercially-available truck ramp / riser options can get expensive. Automobile versions are cheap but their weight ratings are lower.
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Old 02-26-2016, 08:49 AM   #27
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Ok I admit...I'm 'lectric challenged, but is .3v in 10 days/.5v in 14 all that bad?

A lot of stuff never sleeps on todays vehicles.



Bob


Yep.

All modern vehicles suck battery when parked. It is the flip side of our affliction with gadgetittis.

Even my cell phone sucks battery when switched off.


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Old 02-26-2016, 09:01 AM   #28
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<<<<REALLY???? Your batteries won't be giving you much service if you let them get discharged to that point (11.8VDC) on a regular basis. >>>>

That is why I have an affinity to old fashioned (i.e. relatively cheap) lead acid batteries.

If I screw up and let the batteries discharge at some point, (and I will), the error is not a grievous and really expensive mistake.


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