Stand alone starting battery for generator

I installed a 12v marine battery just to start the genny.After having 6-6v and having to jump the genny toooo many times because of electric overload,TV,Micro-wave,Laptop,Ipad,Phones,kid games,SAT.\,Itook out 26s and put in an isolated 12v starter.I can put it with the 6s if needed but can also charge by itself.so I can crank on the amps for 6s charging.I use a solonoid setup plus a small battery minder for the 12v.IT works great, no getting out in the cold to jump the genny because the heater want work cause the sail switch .they run the inverter until it shuts them down ..Gotta love the grandkids , they have the garage with 3d TV,GAmes and music.Itworks out because I Know where they are at after the campfire.Had 7 girls at one time ages 5 to 10 and they giggled all night,Priceless...