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Old 04-01-2021, 06:45 PM   #1
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2004 22' Safari
2019 27' Globetrotter
San Luis Obispo , California
Join Date: Oct 2007
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Lithium GP3000 Solar Am I Nutz!

2019 Gt 27'
Added GoPower3000 today👍
Ordered 4 BBs
Thinking about adding to existing factory solar

...then as we were going through the trailer with one lead battery attached confirming that everything worked I realized what the heck was I doing!!

I am putting together a mountain of high class power and the only thing that the inverted batteries power supply feeds is LED lights, TV, and a DVR !

I'm sorry but I think I'm stupid and I'm starting to back off on the 4 batteries and I certainly am not going to add more solar just to power my inside LED lights.

I suppose this is kind of like saying the emperor is not wearing any clothes since this is what we think we need... but do we?

I got so wrapped up in Lithium, solar, and a great CI power supply when I finally came to the realization that I don't need all this just to power led lights!!

Ok I'm really asking what am I missing.

My mech said he could possibly hard wire another dedicated inverter line and outlet to the kitchen counter area and that would at least have some value for larger appliances.

I suppose the non-Airstream folks that load their RV,s roof with solar and storage compartments with lithium probably have a different inverter wiring system than my GT does.

I really wanted it to work out but now I'm thinking only two BB lithiums and no more solar and will save a bundle... hope this helps someone

Boondocking means more than an endless supply of only LED lights and tv

George O'
SLO, Ca
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Old 04-01-2021, 08:50 PM   #2
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Your 30A or 50A Globetrotter can be converted to run everything off the larger 3000W inverter if that’s your goal. I do this all the time.

Using an inverter like a Victron MultiPlus you can pass an entire 30A trailer through it of with the addition of a Smart Phase Selector you can power the entire 50A unit.
It’s not cheap but it can be done and perform quite well if done correctly.

Wiring trailer inverters to a sub panel should in my mind be a thing of the past.
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Old 04-01-2021, 11:40 PM   #3
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In my years of lurking on this forum, it has been my observation that a common method for sizing electrical systems, particularly batteries and solar, is the "install as much as I can fit" approach. If money and weight are of no concern then this method seems to work.

It appears that maybe you are more of the "install what I need" type. Adopting a more practical approach to these upgrades, based math or experience, can reveal that several hundred Watts of solar that maintain as many amp hours of battery capacity may be excessive for a given person.

Of course, individual lifestyles dictate those individual needs and desires so I am not passing judgment here.
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Old 04-02-2021, 05:55 AM   #4
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You would have more power to run the furnace and the fans. That is a big deal in many climates.

And to run the fridge if you have the 12 volt compressor kind. And a CPAP.. Do at least 2 lithium batteries.
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Old 04-02-2021, 05:58 AM   #5
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And don't forget charging the e-bikes and electric coffee maker!
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Old 04-02-2021, 06:08 AM   #6
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I'm actually considering doing something similar on the soon-to-be new-to-me 1994 Excella 25.

I had already ordered a Victron Multiplus II 3000 which is a hybrid inverter/charger for use in my motor home. We since decided to downsize into a 25-ft Airstream, and if I install this hybrid inverter in the 25-ft trailer with a few BB lithium batteries it will be possible to run the rooftop a/c from a small Honda 2000 generator. For us, this reason alone makes the install seem worthwhile as I won't have to wrestle with a larger generator or a pair of smaller ones just to have the a/c running. I also plan to switch the fridge to a 12vdc compressor fridge, and the larger battery capacity will mean that we'd be able to go for at least a few days without sun hitting the solar panels and still be okay.
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Old 04-02-2021, 06:54 AM   #7
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2004 22' Safari
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Maybe this is my real question...

Thank you for your ideas, for myself I wanted to write out what I realize is my real question.
The globetrotter has eight electrical outlets but only five of them will work off of an inverter. That is probably to protect the three main outlets that might be using more power than the existing inverter can handle. However all eight outlets work off of either shore power or generator so all the outlets can handle it. Now with my Go Power 3000 and numerous lithium batteries I am producing enough power to adequately power those three non-inverter outlets the same as shore power albeit limited. So if I'm right there's going to be a wiring or setting solution to this issue. GP tech support was great during the installation so I think my first call is going to be to them today. I don't see a reason why that device should not be allowed provide power to all 8 electrical outlets the same as any other generator. g
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Old 04-02-2021, 09:34 AM   #8
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We fitted nine 100 watt AmSolar panels on the roof of the 2014 Classic and five of the same panels on the roof of our 2015 23D International Serenity. We have a 600 amp-hour lithium battery under the front sofa of the Classic and a 300 amp hour lithium battery under the side sofa just forward of the wheel well. Both trailers were rewired with commercial Hubbell 20 amp 120Vac GFI outlets and all are powered through the inverter so any one can be used when off grid.

We replaced both Dometic refrigerators with Vitrifrigo marine refrigerator/freezes that have a Dan Foss freon based compressor that runs off of 12Vdc and we replaced both stock water heaters with a Truma Aqua Go instant on water heater powered by propane only. Both trailers are converted to the newer Dometic CU-434 propane stoves.

Those are just the tip of the iceberg so to speak for the modifications to both trailers.
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Old 04-02-2021, 09:38 AM   #9
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Quote:
Originally Posted by Bill M. View Post
You would have more power to run the furnace and the fans. That is a big deal in many climates.
Agree. If you plan to camp mostly off-grid (boondock) during the colder months, then waking up at 4AM in a very cold trailer because your furnace fan has run out of power is no fun (happened to us). That is what led to the install configuration described in my signature. Didn't think I needed the lithium batteries and so far that has been the case.
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Old 04-02-2021, 10:09 AM   #10
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Welcome Aboard👍

Disclaimer....I'm odd.

Get two BB's and a converter/charger that will properly charge them and go camping. Up-grade if/when conditions warrant.

Bob
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Old 04-02-2021, 10:28 AM   #11
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Yep: you can do all that and spend big buck or keep it simple ... below is what we did-

Parts List:

Obviously we began with the batteries. We choose SOK 100Ah 12V LiFePO4 Deep Cycle Lithium Iron Phosphate Battery. We did this for several reasons.
Cost – The price of ALL lithium batteries in Canada are based on the US Dollar which means you add 35%. (Example: a Battleborn is $1000US = $1350CDN). The SOK is $620US – we purchased two = $1695CDN landed/delivered.

Wire Size was our next consideration. Research tells us that the standard 6 gauge battery wire used by RV manufactures including Airstream falls short of requirement. We would be looking at a 10% power loss. Based on distance travelled and amperage the battery wire specification reach was 2 gauge for this installation ($80).

Charger/Converter Upgrade. We have a IOTA multistage system at present. One of the unique design features with the IOTA system is the ability to upgrade (change out) the Smart Charge Controller unit from Lead Acid to Lithium ($35 upgrade).

Safety Circuit Breaker. Baomain ANL-80A Electrical Protection on the positive battery cable between the positive terminal and the existing kill switch ($11).

Miscellaneous. There will be the additional need for lugs, straps, screws, additional wiring, 1/2×1 framing etc. ($25+-) This will be determined once we dismantle the Lounge area in Blue Streak and finalise the instal plan ….

What we will not be installing:

Previously installed AiLi 350Amp Volt/Amp Battery Capacity Monitor + Shunt will be used to monitor the new instal.

Previously installed system Kill Switch.

A DC to DC charger from Red Dragon to Blue Streak. This is really not required as we will not be using our tow vehicle to charge the lithium batteries while we are driving. We have 200w of solar on the roof of Blue Streak which does the job. To protect our Tow Vehicle charge system we will simply pull the 30amp fuse.

A built in Inverter. We have a 300w inverter that we “plug-in” as required to grind our coffee (can’t live with out a fresh grind). We don’t run anything else to warrant a larger inverter. We also carry a Champion 3400 inverter generator which we run on LP should the need arise.

While we know of some folks who spent $16,000.00 to turn their Airstream into a “lithium system power plant”, our budget is $2000.00.

We have previously installed 200w of Solar + MPPT Solar Charge Controller and carry a 160w Solar suitcase (BC has trees)

If you want to see our install go here the-lithium-experiment-introduction/
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Old 04-02-2021, 10:52 AM   #12
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I am into mine for about $3,000 Canuck bucks. I have:
1 x 250ah GP Lithium Battery.
1 Victron 712 Battery Monitor
1 x GP 1500 invertor with Remote
1 x GP Converter (adjustable to 16V DC output)
1 x GP Shore Switch

Not counting my time to install this stuff.

All my outlets work off AC cord or when running the inverter.

I don't plan on ever running Aircon with out being plugged in. We don't get the heat and humidity over here.

I plan on getting a Victron Solar Charge Controller and about 300 to 400W of newer portable panels this year.

I should be able to run off grid for some time once this setup is complete. Just using the lights, TV and other light power consumers.
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Old 04-03-2021, 10:14 AM   #13
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We like to boondock and the 2 AGM batteries fall short especially if we have to run the furnace. If you plan on boondocking in the fringe or winter season than 3-400 amp of lithium sounds about right to me. I have 360 watts of solar, I add 2 x 90 watts to my existing system, it keeps my AGMs topped off but they still can be down to 30% before the sun comes up and that is not good for the batteries. So I’m planning on adding 300 amp hours of lithium to avoid running out of juice or having to use my generator as often.

Good luck and travel safe,
Mike
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Old 04-10-2021, 05:38 AM   #14
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I’m in the group that couldn’t run the furnace for three nights boondocking, without getting the generator out. Two lithiums and we are good to go. We carry portable solar panels bought used. Keeping it as simple as I can. But when it’s cold, I’m running the furnace.
I have no interest, at this time, to beef up the system to run AC off batteries and solar.
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