Can WFCO Model 8540 be Converted to Work with Lithium Batteries

Question

Question:

I have a WFCO Model WF-8540 in my travel trailer currently. It is not compatible with lithium batteries that I just switched to. Solar takes care of finishing the charge the rest of the way for the lithium batteries. Would I be able to just swap out the converter of the WFCO unit with this one, or would I have to change out the whole power center?

asked by: Gerald P

0

Expert Reply:

Hey Gerald, since there isn't a lower section replacement for what you have now that would allow it to work with Lithium batteries what you would need to do is replace the entire panel with the Progressive Dynamics part # PD4045KA which is lithium compatible.

expert reply by: Jameson C

0

Steve

3/22/2026

Why not get the 8540AD? Wouldn't fit in the same space with no modifications?

Jameson C.

3/23/2026

@Steve That's not a part number we carry at this time.

Answer 1

The Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger #PD4045KA is actually the same unit as the PD4045KV. The KV is just an alternate part number for the same unit so this is the one that you want for a replacement.

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Answer 2

I have a solution for you but there isn't just a replacement converter section for the Elixir ELX-45. You're going to need to replace the entire panel with the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger item…

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Answer 3

I spoke with Progressive Dynamics and they informed me that you cannot replace just the converter section and you would need a new panel, the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger part #PD4045KA. The Progressive…

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Answer 4

I have a solution for you because as you know what you have now cannot charge Lithium batteries. You will need the Progressive Dynamics #PD4135K which is designed to replace your WF-8735P and is compatible with Lithium batteries. When this is…

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Answer 5

Hey Mike, welcome back! Thanks for all of the info you listed from your Grand Design. Based on that and fact you have 5,200 lb axles the correct bearing kit would be the part #BK3-300 which comes with the correct bearings, races, seal, and a cotter…

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Answer 6

Hey Mason, yes the Progressive Dynamics 4000 Series Mini RV Converter w/ Charge Wizard and AC/DC Distribution Panel #PD4045KA that you referenced can work for you but like you mentioned you do need to make sure your current wiring can handle the…

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Answer 7

Thanks for the picture! I checked with Progressive Dynamics the replacement power converter you need for your Parallax Series 7300 Model 7345 is the Replacement Converter for Parallax/Magnetek or WFCO RV Power Centers - 45 Amp item #PD4645V.

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Answer 8

Hey Jeff, so unfortunately Dometic doesn't have a replacement flush ball for the 320 which is super frustrating. Only solution would be an all new toilet like the 320 part #DOM87FR which is white or part #DOM27FR which is like an off white color.…

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Answer 9

Hey Klara! Yes, the Replacement Main Board Assembly for WFCO Auto-Detect RV Power Centers #WF76FR will fit your WFCO 8955PEC. This is just a variation of the 8955 model so this main board will work as a drop-in replacement. Did yours fail or are you…

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Can WFCO Model 8540 be Converted to Work with Lithium Batteries

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