Battery Temperature vs Cycle life
Home Power mag is a great resource for folks going cruising , as their info is excellent and slanted to the "off the grid" folks.
The new issue brings up a fact that it would seem many boaters (and Naval Arch) never bothered to contemplate.
" Chose a location with moderate temperatures (77F is ideal) is critical for battery longevity.
For every 18F increase in temperature the battery experiences ,the number of available cycles drops by HALF!
For example a battery rated at 3600 cycles at 77F (or approx 10 years , at 1 cycle per day) it would then be expected to last 1800 cycles or about 5 years if installed at a climate of 95F"
A good marine engine space will be under 110F with GREAT! powered ventilation , many go far higher.
Since many folks have the batts inside the engine space that is probably closer to 125F , its is no wonder that our batt sets die early.
For folks doing a rebuild , that have a chance to locate the batt sets out of the engine spaces , it would seem a grand idea!