hi enio,  we have an LEAB 3.200W  charger installled.  maybe some "overkill" but does its job. typical load current is below 80A when battery charge state is 70% (we do not let them go below 70%, 500AH 12V). charger can handle up to 200A.

http://www.leab.eu/fileadmin/data/files/products/charger/ABC_3200_DE-EN_2009.pdf

fair winds,

herbert

KALI MERA, SN120, Trinidad