Can Converter Section for 4590K18L be Upgraded to Lithium Batteries if it Doesn't Have an Li Switch?

Updated 09/20/2025 | Published 09/11/2025

Question:

2014 primetime Crusader 260 RL. Has a Progressive dynamics PD 4590K18L power Center converter. This power center includes the power wizard button, but does not include lead acid/lithium ion switch. I looked over your QandA and I still can’t figure out what part number I need to upgrade to the lithium compatible Power Center converter. Am I able to simply purchase a replacement converter board? Or will I need to replace the entire power center? Please provide correct upgrade part numbers thanks.

asked by: Kurt P

Expert Reply:

Hey Kurt!

The converter section can't be replaced, but you can replace the entire power center with the 4500 Series # PD4590K18LS8 which comes with the switch you're needing.

I wish there was a converter section that would make the upgrade a little more simple, but since your model doesn't have the switch, there isn't a way to get this to work.

Are you just looking to get better life out of your battery bank with the lithium batteries?

expert reply by: Jon G

Kurt P.

9/18/2025

Hi Jon. Thanks for your reply. Yes, my goal is to make the rv more self-sufficient by installing a Lion battery bank, a roof mounted solar system, and the appropriate mppt controller

Jon G.

9/18/2025

@KurtP Do you already have a solar system and controller in mind?

Kurt P.

9/20/2025

Nope. Not yet. I’ve been watching lots of Will Prouse and other videos on You Tube. Budget is also an issue for me. So, I would like to install it in phases, starting with 2, 280wh Lipo batteries. I’ll leave the roof top solar for last, but want to play with a portable solar panel (or 2) while learning. I already have 2, suitcase generators that together output around 5000 w running at 120 vac. I would like to plan out a system that is 24v, based on 2, 280wh, non-smart Lipo batteries. I know I’ll need a DC-DC converter, fuses, buss bar, 00 wiring, disconnect, MPPT controller. I would eventually add as many panels as I can on the roof, which is likely 5 or 6. AND, on travel days I want to use the truck to charge the Lipo batteries. This system would be spec’ed for 150A 12v dc, require a DC-DC charger, fuse, some hefty 000 wire runs from front of truck to Anderson power pole connectors in the truck’s rear, then on to the 5th wheel. Ok, so there you have it, my champagne dreams of taking our 5th wheel to completely off grid

Jon G.

9/20/2025

@KurtP I love it! And I like that you have a whole step by step process in mind as well. Redarc has some really cool battery/solar management systems you might consider looking into while you do your research. They're based in Australia, so everything they do is designed to deal with the Outback. Let me know if you have any questions along the way! Solar stuff isn't necessarily my strong suit, but I've got some people I can reach out to if we get beyond what I know.