Solution for Needing Replacement for WFCO Converter 8735P that is Lithium Compatible

Updated 11/13/2025 | Published 10/20/2025

Question:

Hi, Is there a direct replacement to the 8735P that is compatible with lithium batteries and the same form factor (I.e., will sit in the same space as the 8735P)? Thanks, Jim

asked by: Jim

Expert Reply:

Hey Jim, to replace what you have with something that is Lithium compatible you would need the part # PD4045KA which is lithium compatible. It is also rated a little higher as well at 45 amps but it will still work great.

What you have now is 11 7/8 inches wide x 8 1/4 inches high x 5 inches deep. The # PD4045KA is just a little bit bigger at 12-1/4" long x 8-3/4" tall x 7-1/4" deep so it would work great in that regard as well.

expert reply by: Jameson C

Jameson C.

11/13/2025

Hey Jim, how did the swap to the PD4045KA go with your setup? Did the slightly larger size fit into the space where your old 8735P was mounted? Your update could make it easier for the next person working on the same upgrade.

Jim

11/13/2025

@JamesonC Haven't done it yet, just planning ahead for next season, to be honest. I'm planning on upgrading to lithium batteries and the upgraded converter is on my list