Can The WFCO WF56FR 100A Converter Charge A Large Lithium Bank Fast With Generator?
Published 02/17/2026
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Question:
Can the WF56FR 100A charge a large lithium bank faster with my Honda 2000 generator powering it? My lower amp unit doesn't charge as fast and I thought the generator was the issue at first. Upgraded generators (which was needed anyways) and it still isn't charging batteries fast enough.
asked by: Rob
Expert Reply:
Good afternoon Rob.
Yes, that’s exactly where the 100A WFCO Converter # WF56FR shines.
In lithium mode, it boosts to 14.6V DC and allows maximum current flow during Charge Mode. That means shorter generator runtime - which is ideal with your new generator.
Just keep in mind:
-It requires a 20A AC circuit from the shore power to the converter/charger
-It benefits from short, heavy-gauge DC wiring no smaller than 3 gauge from charger to battery
-Solar running simultaneously can compete during bulk charging
If you’re running 300–400Ah lithium, 100A makes sense. If it’s just 100Ah, 55A unit like # WF38FR may already be plenty.
How many amp-hours total do you have in your battery bank? And what amp rating is your current converter/charger?
Product Page this Question was Asked From
WFCO Auto-Detect RV Converter Charger - Deck Mount - 12V - 100 Amp
- RV Power Converter
- Converter Only
- No Battery Mode Switch
- 12V
- 100 Amps
- AGM
- Gel
- Lead Acid
- Lithium
- Multi-Stage Charge
- WFCO
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Rob
2/17/2026
I have 3 100ah 12v batteries wired in parallel = 300ah total. Current charger is 45a so 55a would likely help. Might go with the 100a if I can get the wiring taken care of. thanks for the help andrew.