Replace WF-8735P Power Center with Lithium Ready Model

Updated 05/30/2025 | Published 02/03/2021

Question:

Hi... I have a WFCO Converter Model WF 8735P my 2019 Jayco Hummingbird. I now have lead acid batteries. I want to change and install 2 Battle Born 100amp lithium batteries. Do you have a replacement for the WF 8735 p converter that will allow me to 2 100amp lithium batteries.

asked by: Craig T

Helpful Expert Reply:

WF-8735P is a 35-amp panel model. To upgrade to a lithium ready system you will need the Progressive Dynamics # PD4135K Converter/Smart Charger rated for 35-Amp. this system includes a high voltage output to provide full, quick charge for your lithium batteries. The Charge Wizard monitors your RV's batteries and automatically begins charging when needed. Multistage charging helps extend battery life.

Note: Not all units are a direct replacement. Some modifications may be required. I have attached the installation instructions. You will only need to verify the opening and depth measurements.

expert reply by: Les D

Rodney

5/30/2025

I'm not seeing the PD4135K on your site? Cna we replave tjust the converter component?

Nick S.

5/30/2025

@Rodney The only replacement converter section we have for 35 amps is # PD4635V. It is going to be bigger than the progressive dynamics # PD4135K, which we no longer carry. The converter section itself is more expensive than a new distribution panel, and since we do not carry that old PDK4135K any longer I recommend going with a new distribution panel like part # PD4045KA.