Lithium, Inverter, and Solar Upgrade

[Grizz000]

Hi everyone — I previously did an intro in the introductions section, but my wife and I are new (to us) Oliver owners (about 2 months in). We’ve camped twice so far and already have several trips planned over the next several months, including a lot of boondocking in USFS campgrounds. I've had travel trailers of various forms for about 20 years and we are super excited to now be Oliver owners.

I just finished a lithium / inverter / portable solar upgrade on our 2019 Legacy Elite II (Hull 514) and put together a detailed project write-up with photos, wiring approach, parts list, and lessons learned (see attached). The trailer came from the factory without an inverter, no roof solar, and no solar connector. It had two AGM batteries when we bought it. The main goal was a clean, reliable, serviceable install that leverages the existing factory AC/DC wiring/routing and keeps the system simple (including an inline inverter/charger pass-through so the trailer’s AC panel works “like stock,” just with inverter capability).  

I found great info on this forum as I undertook this project and hope to give back just a little by posting this as a practical reference for anyone planning a similar upgrade — happy to answer questions or share any additional photos/details if it helps.

Happy camping!!

 

Lithium Inverter Solar Write-Up.pdf

Edited March 6 by Grizz000
Updated File

[WandR]

Fantastic right up! Very nice job with great detail. I am sure this is gonna be a big help to other Oliver owners who want to do a similar upgrade.
Thank you for sharing.

[BigTexas]

I downloaded the pdf for when I get around to doing my upgrade.

Thanks for all the detail and thought you put into putting this together.

[John Dorrer]

On 3/5/2026 at 10:11 PM, Grizz000 said:

Hi everyone — I previously did an intro in the introductions section, but my wife and I are new (to us) Oliver owners (about 2 months in). We’ve camped twice so far and already have several trips planned over the next several months, including a lot of boondocking in USFS campgrounds. I've had travel trailers of various forms for about 20 years and we are super excited to now be Oliver owners.

I just finished a lithium / inverter / portable solar upgrade on our 2019 Legacy Elite II (Hull 514) and put together a detailed project write-up with photos, wiring approach, parts list, and lessons learned (see attached). The trailer came from the factory without an inverter, no roof solar, and no solar connector. It had two AGM batteries when we bought it. The main goal was a clean, reliable, serviceable install that leverages the existing factory AC/DC wiring/routing and keeps the system simple (including an inline inverter/charger pass-through so the trailer’s AC panel works “like stock,” just with inverter capability).  

I found great info on this forum as I undertook this project and hope to give back just a little by posting this as a practical reference for anyone planning a similar upgrade — happy to answer questions or share any additional photos/details if it helps.

Happy camping!!

 

Lithium Inverter Solar Write-Up.pdf 15.26 MB · 43 downloads

You might want to look into Coy's mobile tracking solar set-up that several Oliver Owners are using.  Hopeful these owners will chime in and provide info on contacts and how the system works. With your set-up that could be a game changer.

[mossemi]

@Grizz000 Thank you for the excellent write up on your Xantrex inverter/charger, battery and solar mod.  
I do have a question about your method of attaching the Coosa board to fiberglass.  I am specifically interested in how you applied the G/flex 655 to the Coosa board panel.  Did you apply the G/flex to both surfaces and was it applied in a bead or puddle and did you spread  or tool it?

Mossey