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Old 11-13-2015, 01:54 PM   #15
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Consider if you assembled a 300 AH battery the components would cost about $2K so $3K for a 400 AH system seems reasonable. My guess is that you're paying perhaps only 20% more than a DIY system yet you are getting all the benefits that it entails! Looking forward to seeing your installation.
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Old 11-13-2015, 08:02 PM   #16
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Patton, it was a typo. It is an 'inexpensive' monitor. $50 Here's the link to the Elite site with the LCD monitor. Elite Power Solutions

I'll shoot a photo of the screen and how I have it mounted (simply used 3M picture hanging strips) tomorrow.

Alano the price as you point out is higher. But the weight and size savings are also another factor. Other than the Bluesky controller (mounted where we took out the old 600w Inverter) my 400ah system all fits under one of the dining couches. No way I could have found a home for an equivalent AGM system (600ah of batteries).

This week I was camping in Las Vegas NM and Raton NM. I did hook up to power just to run the TV and computers. But all 12v systems were run from the batteries and all charging was from my solar panels. Lots of furnace time at night. Morning I was at 60-65% capacity. By 1-2pm I was fully recharged with daylight to spare. Panels were not tilted. One location I oriented E-W and the other I was N-S. Seemed to get the same results in the early winter sun angles. 25-26 amps output through the BlueSky. Very happy with the results.
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Old 11-13-2015, 09:58 PM   #17
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If I could replace my lead acid cells with lithium cells in the outside box I'd probably do it in a heartbeat. Unfortunately these cells can't be charged at subfreezing temperatures so folks are placing them inside where the temperatures are milder. I'm also not terribly comfortable with all that energy inside the caravan without a protective barrier in the rare case of a failure. It's one of those things where the probability of failure is low but the consequence is high. This stuff is cutting edge for sure.

Like Tesla, perhaps someone will integrate a heater in the lithium battery pack that keeps the cells above freezing when there's any attempt to charge the battery pack. If that system would drop into my outside box and replace the two type 27 batteries that are currently in there with a 300 AH lithium solution, I think they would sell like hotcakes.
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Old 11-14-2015, 08:10 PM   #18
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Here's photos. The display has two views. The standard is where I leave it most of the time. There is a momentary switch that changes to the individual cell information. Simply used 3M picture frame velcro to the wall.

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Old 11-15-2015, 01:12 AM   #19
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Quote:
Originally Posted by RVDreamer View Post
Where did you hear that you shouldn't charge a lithium battery below freezing?
All literature on current lithium batteries such as the GBS state this. You can damage the batteries if you charge below freezing, but using them is just fine.

I installed 300AH sometime around March, placed them under the bed where they would be kept warmer.
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Old 11-15-2015, 01:17 AM   #20
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@ghaynes755, what did you use for OV/UV control? I have heavy duty 250amp contactors (enough to support an inverter) but they take 0.4amps each.

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Old 11-15-2015, 05:09 AM   #21
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We have eight 100 watt AM Solar panels on the roof of our 2014 Classic model 30. The solar power cable came down inside the refrigerator cabinet to the Tri-Star 60 MPPT that was inside a void of the triangular storage cabinet behind the dinette. The output then went to the Magnum MS-2800 that replaced the OEM equipment under the street side of the sofa.

The single AM Solar 600 amp-hour lithium iron phosphate battery is beside the Magnum under the sofa. While it weighs 168 pounds, the four removed Lifeline 6ct 300 amp-hour 6Vdc batteries at 92 pounds each plus a custom stainless steel enclosure removed about 450 pounds that was between the front trailer skin and the propane tanks.

We have seen 575 watts from the solar array on a sunny day.

We were able to put five of the AM Solar 100 watt panels on the roof of our 23D feeding a BlueSky 3024iL charge controller. The Magnum MSH 3000 is connected to a 84 pound AM Solar 300 amp-hour lithium iron phosphate battery mounted under the sofa just in front of the street side wheel well. Have yet to test in the summer sun for the maximum charge rate.
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Old 11-15-2015, 11:19 AM   #22
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I've been following the Tesla Powerwall for other reasons. I get it. This was designed for a home, not a mobile. But it seems to offer a lot fo $3k. Could it be adapted to work for RV applications
Tesla Powerwall
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Old 11-16-2015, 08:30 AM   #23
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Here is an explanation of why a Power Wall is not fit for RV use.

http://www.airforums.com/forums/1711045-post.html


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Old 11-16-2015, 10:32 AM   #24
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Mixed, sorry not sure I understand your question. Can you elaborate?
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Old 11-17-2015, 09:26 AM   #25
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ghaynes755, the EMS you have from Elite Power Solutions has over and under voltage protection circuits that can drive a contactor relay (similar but not the same to the battery disconnect, one each for over[OV] and under[UV]). If you don't have the battery isolated by those circuits and you over or under charge the batter, you're warranty wont be valid. Elite warned me of this more than once while I was working out the electrical. The solution I came up with unfortunately also takes 0.4amp continuous power for each contactor.

I replaced the battery disconnect with this:
http://www.amazon.com/gp/product/B0016HRUPE

And used contactor relays for UV/OV:
http://www.amazon.com/gp/product/B001YIPXR2

I then rewired everything to go through all three, isolating the battery when disconnected by any one. Those are all high amperage to support an inverter drawing power through them.
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Old 11-17-2015, 09:49 AM   #26
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One of the reasons to install a complete lithium system. Our monitor contains all required hardware and firmware along with a manual master disconnect and 500 amp solenoid and is fully integrated into the balancing board circuit. As it is a latching type, the amp draw is significantly less than 0.4 amps.

The system and battery carry a 5 year warranty.


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Old 11-17-2015, 09:55 AM   #27
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Yes there is an OV/UV relay in the mix. In the first photo, between the Magnum on the right and the batteries on the left, the bottom red knob is master disconnect. Above that is a 400amp fuse and above that is the relay. All controlled by the Elite Power EMS box. But as far as I know there is no need for two of them. The EMS diagrams show two but that is the situation of one side being a motor controller like a car. The red master on/off seems to be the standard for solar installs from AMSolar, Marvin and Lew.
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Old 11-17-2015, 10:37 AM   #28
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We installed the 300 amp hour lithium iron phosphate battery under the sofa of the 23D along with the BlueSky 3024iL solar charge controller and the Magnum MSH-3012 is on the other side of the furnace. We did not have to modify the Airstream cabinetry of the sofa and street side dinnete seat. The new Marmoleum flooring is showing covering the already torn brown stock linoleum.
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