Sizing Battery Converter

[dsaint1884]

I am building out my van/RV setup and am trying to figure out what size converter to purchase. I feel I've narrowed it down to the PM-4 or PD Lithium line as both support constant voltage lithium compatible charging, but I don't know what size amp converter to purchase.

Battery wise I'll be running 2x 12v 100ah LiFePO4 batteries from CHINS, standard version not the SMART ones. Total of 200ah capacity. Amazon and their website have conflicting information on the standard charge rate.

• Max charge current: 70A (From amazon)
• Max continuous charge: 50a (From website)
• Standard Charge: 20a (both Amazon and website)

If I'm running these in parallel I believe they can assume a standard charge of 40a. Both the PM-4 and PD lines offer 45a converters. Is being slightly above the 40a standard charge a problem? Should I opt for a 35a charger or could I even go larger and get 60-65a because I'd be well below max charge amps when in parallel?

Thank you!!!