there have been comments about a critical voltage for charging AGM. The batteries I am using will take up to 15 volts of charge.
I tend to disagree with the critical voltage charge of AGM. I have been using the same optima blue top batteries D34M for over 7 years now. for the first three years they were the starting batteries for my boat with two 454 big blocks. After the remainder of the time they have been in my MH as starter batteries for my isb. in all cases the engines fire up almost immediately.
I have never worried about the charge voltage or rate. the nice part of the optima is that alternator charge rate allowed is 13.5 to 15 volts at 10 amps max for up to 12 hours. they will also take a huge absorption charge at 15.6 volts with unlimited current until 1 amp/ float charge is 13.2 13.8 forever. I never really float the batteries.
this series of battery can be used for starting and deep cycle. the recommended alternator is 13.68 to 15 volts. that should cover about every MH out there.
Experience beat BS every time.
My house batteries are deep cycle Golf Cart four six volts charged with a progressive three stage charger. I gave up on the 12 volt marine deep cycle loooonggg ago.
Optimas D34M batteries are a hybrid deep cycle/starting battery, not to be confused with a true deep cycle agm, therefore they are tolerant of a higher charging voltage as they have Heavier plates.
The recommended charge voltages for other AGM deep cycle batteries is:
3 stage charger
Bulk 14.2-14.4
Acceptance 14.2-14.4
Float 13.2-13.3
2 stage charger
Bulk 14.2-14.4
Float 13.2-14.3
Single stage charger
Bulk 14.2 14.3
I tend to disagree with the critical voltage charge of AGM. I have been using the same optima blue top batteries D34M for over 7 years now. for the first three years they were the starting batteries for my boat with two 454 big blocks. After the remainder of the time they have been in my MH as starter batteries for my isb. in all cases the engines fire up almost immediately.
I have never worried about the charge voltage or rate. the nice part of the optima is that alternator charge rate allowed is 13.5 to 15 volts at 10 amps max for up to 12 hours. they will also take a huge absorption charge at 15.6 volts with unlimited current until 1 amp/ float charge is 13.2 13.8 forever. I never really float the batteries.
this series of battery can be used for starting and deep cycle. the recommended alternator is 13.68 to 15 volts. that should cover about every MH out there.
Experience beat BS every time.
My house batteries are deep cycle Golf Cart four six volts charged with a progressive three stage charger. I gave up on the 12 volt marine deep cycle loooonggg ago.
Optimas D34M batteries are a hybrid deep cycle/starting battery, not to be confused with a true deep cycle agm, therefore they are tolerant of a higher charging voltage as they have Heavier plates.
The recommended charge voltages for other AGM deep cycle batteries is:
3 stage charger
Bulk 14.2-14.4
Acceptance 14.2-14.4
Float 13.2-13.3
2 stage charger
Bulk 14.2-14.4
Float 13.2-14.3
Single stage charger
Bulk 14.2 14.3