Battery charging quickly and deeply by a generator is very possible but only if you know how it has to be done. This article shows why and how.
Caravan & Motorhome Electrics
The essential handbook for anyone with an RV of any kind. Everything you need to know to make the electrics in your rig work for you.
Any bookshop, whether online or bricks and mortar, can order copies of Caravan & Motorhome Electrics.