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Old 05-13-2015, 10:43 PM   #15
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Originally Posted by AWCHIEF View Post
What did all that cost?
A lot?

Lew Farber...RVIA Certified Master Tech...ABYC Certified Master Marine Electrician
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Old 05-14-2015, 09:23 AM   #16
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Ballpark on the batteries only from AMSolar would be $4699 for 600ah. Basically after you get the initial 100ah at $1199 each additional 100ah is $700. At least that is my understanding of the pricing model. Rest of system would be the same for panels, controller and inverter/charger. But the weight difference is huge and at the end of the day the cost of AGM vs Lithiums should end up the same or favoring the lithiums based on the lifespan/charge cycles of the two types of batteries. Larger investment up front for lithium but weight and space savings swayed me to do lithiums in my new Classic.

Switz just a suggestion. Don't run them down past 80%. I've had a lot of experience with lithiums for UAV systems. They are LiPo's so different chemistry but in the UAV world running below 20% is often a death sentence for the battery. The usage curve is different since in flight we are pulling a fairly high number of amp hours continuously but I can't begin to tell you the number of folks that killed their batteries with over discharge. Normally they would find it out while on the ground or the charging station but every once in awhile the battery would allow a takeoff and then once in flight abruptly drop voltage and capacity leading to the only part of a flight that is not optional, a landing, sometimes with unhappy endings.

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Old 05-14-2015, 09:33 AM   #17
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Thank you Gary!

I don't post pricing details on the open Forums due to commercial vendor status, but you are perfectly free to do so and you hit the nail on the head!

I just picked up a pair of 400 A/H lithium packs along with a 300 A/H unit and a bunch of other solar stuff for my initial stock as I re-open my installation center in Hood River, OR.

Many folks are adding lithiums to their larger solar packages......especially on Airstreams. I also have 6 other Airstream owners who have recently completed solar installations that I did while in FL stopping by during their summer travels to install their lithiums that will complete their projects.

Expensive.....yes! Worth it? Considering the huge weight saving and potential 15 year life span.........Definitely!!
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Old 05-14-2015, 09:35 AM   #18
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The solar circuit breaker and fuse were left where they were installed above the board on the first go around. We blanked out the two holes for the wires through the wall going to the battery box on the tongue and reskinned that area on the outside and installed an external power outlet. We put a 4"x4" electrical junction box extension on the inside to protect the wiring of the outlet. It was then plugged into a GFI duplex outlet that replaced the existing airstream single outlet inverter outlet.

Since a 30 amp outlet was the only choice with the twist cover design, I made a 30 amp twist lock male to 20 amp standard female extension cord about three feet long.

We were unable to put the existing sub woofer back due to it's size and will look for a more petite shape.

Since we had already installed the Magnum MS-2812 along with the 800 watts of solar panels on the first modification, the rewiring was basically pulling the 4-0 black and red wires back inside along with the TriStar and Magnum sensors wires and reconnecting. Some were made a little shorter as there was less distance between connections for the intended results.

Another bonus was the original battery cover that had been cut down to a 4" wide opening was replaced with a full sized cover allowing freer access to the disc brake pump and controller that reside in the box after the disc brake conversion.

During the original conversion, there was an extensive rewiring of the trailer with a new main box installed in the street side locker. A breaker was changed from two circuits to a single circuit breaker to drop the water heater AC power (installed a Truma AquaGo Custom propane instant on water heater that only needs 12Vdv for control circuit) this trip so we have only a two pole 30 amp breaker with #6 wires going to the Magnum in front, a breaker for the front air conditioner and a breaker for the refrigerator.

Then #6 wires returned from the Magnum to the existing Classic power panel in the rear curb side roof locker. All breakers there are now single circuit. All AC outlets were converted to 20 amp GFI commercial grade outlets.
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