Download High Res Text alternative: Estimated numbers of new cancer cases and deaths in Latin America and the Caribbean, both sexes, 2012. Notably, lung cancer mortality rates among females continue to increase in most countries of the Americas.
Odyssey are generally regarded as the best AGM batteries. They have a service life of 3 to 10 years, & can hold a charge for upto two years. To check the battery.......give it a full charge, then leave for 24 hours, then check voltage.
Your battery bank is 800AH based upon the 100hr rate. I would consider it to be about 720AH based upon a 20 hour rate. The typical life for a deep cycle AGM is 4-7 years, for batteries that are being used.