Paul, 

You're running all of those appliances during your 12+ day intervals between running genset? 

I have 960w and can put in 200-250ah a day. I may upgrade and add another 400w on the bimini but I fear I'll just upgrade my usage too! 
--
Scott 
2007 A54 #69
SV Tengah
http://www.svtengah.com