Replace Converter/Charger Section of Parallax 8355 For Lithium Batteries

Updated 08/12/2025 | Published 03/11/2021

Question:

Do you have a recommendation regarding an upgrade to my Parallax P.S. Model 8355 to a Converter Charger that supports an SOK SV12V206 LiFePO4 RV house battery? The SOK SV12V206 spec sheet shows recommended/max charge currents of 40A/50A.

asked by: Christopher J

Helpful Expert Reply:

The Progressive Dynamics # PD4655LIV is exactly what you need. No need to replace the entire power center, just the converter/charger section. The # PD4655LIV will provide 55 amp charging for your lithium battery(s).

expert reply by: Les D

David G.

8/12/2025

Can this replacement be a DIY or not? Any instructions or step by step included with the replacement unit?

Jesse M.

8/12/2025

@DavidG Depends on your experience level. If you are familiar with converters and have done electrical work before it can definitely be a DIY replacement. If you are not familiar with working on electrical systems you should take it to an RV tech.

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