AGM Battery Question
Flooded batteries come deep cycle and cranking. The AGM batteries that Camping World has on sale are shown as "Dual Purpose". Aren't AGM batteries designed as deep cycle and cranking or they in fa...
Forum Discussion
For this post there are three classes of battery
Flooded
Maintenance free exclusive of AGM
AGM (Sub set of Maintenance free)
The first and last can be easily found in DEEP CYCLE, Marine/Deep cycle, or starting batteries
The middle one is a bit hard to find in DEEP CYCLE, but in theory should be possible.. Just never saw one (Perhaps a trolling battery)
The Dual Purpose are Marine/Deep ..
Regular starting batteries are rated in both cranking amps and cold cranking amps, This is because they need to deliver a lot of energy very fast. But in terms of their total capacity, not all that much.. They like to be kept well fed.
Marine batteries they drop teh COLD cranking amps (Cold is less than freezing point of water) but are otherwise the same. Which is why I do not distinguish between those two
Marine/Deep cycle are mostly starting batteries, they behave like starting (Marine) batteries however they can be run down a little bit more than a true starting battery. I'm going to run a few numbers in a bit.
DEEP CYCLE, are designed for a slower (Relative to capacity) discharge but can go to 50 percent state of charge before serious damage happens.
Starting,, Normal amps less than 100, Normal time less than 30 seconds, perhaps times 5 just to be sure.
250 amp minutes = roughly 30 amp hours. Most starting batteries are at least 75 amp hours (or larger) and darn few engines need 2.5 minutes of cranking to start.
The 8.1L Vortec on my motor home would start with a 73 amp hour battery that had more than 50 percent cranking amps.... Think about this. Not a lot of juice
I have started as many as 5 cars off a 27 hour (1,000 amp peak) jump box without recharging, this gives you an idea of the amount of total energy a cranking battery is designed to deliver. That box had an AGM inside it.
Keep cranking batteries at least 75% charged for better life.
Flooded
Maintenance free exclusive of AGM
AGM (Sub set of Maintenance free)
The first and last can be easily found in DEEP CYCLE, Marine/Deep cycle, or starting batteries
The middle one is a bit hard to find in DEEP CYCLE, but in theory should be possible.. Just never saw one (Perhaps a trolling battery)
The Dual Purpose are Marine/Deep ..
Regular starting batteries are rated in both cranking amps and cold cranking amps, This is because they need to deliver a lot of energy very fast. But in terms of their total capacity, not all that much.. They like to be kept well fed.
Marine batteries they drop teh COLD cranking amps (Cold is less than freezing point of water) but are otherwise the same. Which is why I do not distinguish between those two
Marine/Deep cycle are mostly starting batteries, they behave like starting (Marine) batteries however they can be run down a little bit more than a true starting battery. I'm going to run a few numbers in a bit.
DEEP CYCLE, are designed for a slower (Relative to capacity) discharge but can go to 50 percent state of charge before serious damage happens.
Starting,, Normal amps less than 100, Normal time less than 30 seconds, perhaps times 5 just to be sure.
250 amp minutes = roughly 30 amp hours. Most starting batteries are at least 75 amp hours (or larger) and darn few engines need 2.5 minutes of cranking to start.
The 8.1L Vortec on my motor home would start with a 73 amp hour battery that had more than 50 percent cranking amps.... Think about this. Not a lot of juice
I have started as many as 5 cars off a 27 hour (1,000 amp peak) jump box without recharging, this gives you an idea of the amount of total energy a cranking battery is designed to deliver. That box had an AGM inside it.
Keep cranking batteries at least 75% charged for better life.
