v1_0
Chief Petty Officer
- Joined
- Aug 27, 2007
- Messages
- 575
I'm working on a project that will need some battery power. Looking at the choices of batteries, an AGM type best fits what I need - can be set on their side, won't leak, etc.
I'm needing 24volts, but the only batteries that I seem to find of that sort are aircraft starter batteries. I'm sure those would do the job, but they are rather expensive.
I've also read that you can take two 12v batteries and hook them up in series to get to 24 volts.
I'm looking at a drain on the battery(ies) of about 20amps or so for about an hour. So the batteries don't need to be particularly beefy - except that most batteries are rated for 20 hours of drain, and shorter drain times will shorten the life of the battery.
Based on all that, looks like I have a couple of options:
1. Go with 2 12v ~80AH Deep Cycle AGM batteries and hook them in series.
2. Go with 4 12v ~40AH Deep Cycle AGM batteries and hook them 2x2 (2 in parallel, then those 2 sets in series).
Here are my questions:
A. From what I understand, the second option is actually the better option from the point of view of "strain on each battery". The current drain is divided by 2 (parallel) and that's what is the main factor in battery strain/life. There is the possibility that I could go to a smaller size (30AH) - but from what I've seen there isn't much a difference in price between a 30 and 40AH battery. This leads into the next question:
B. Which brands of batteries are "better" in terms of reliability + price. I'm guessing that some of y'all use batteries a bit for your trolling motors, and may have some insight here...
-V
I'm needing 24volts, but the only batteries that I seem to find of that sort are aircraft starter batteries. I'm sure those would do the job, but they are rather expensive.
I've also read that you can take two 12v batteries and hook them up in series to get to 24 volts.
I'm looking at a drain on the battery(ies) of about 20amps or so for about an hour. So the batteries don't need to be particularly beefy - except that most batteries are rated for 20 hours of drain, and shorter drain times will shorten the life of the battery.
Based on all that, looks like I have a couple of options:
1. Go with 2 12v ~80AH Deep Cycle AGM batteries and hook them in series.
2. Go with 4 12v ~40AH Deep Cycle AGM batteries and hook them 2x2 (2 in parallel, then those 2 sets in series).
Here are my questions:
A. From what I understand, the second option is actually the better option from the point of view of "strain on each battery". The current drain is divided by 2 (parallel) and that's what is the main factor in battery strain/life. There is the possibility that I could go to a smaller size (30AH) - but from what I've seen there isn't much a difference in price between a 30 and 40AH battery. This leads into the next question:
B. Which brands of batteries are "better" in terms of reliability + price. I'm guessing that some of y'all use batteries a bit for your trolling motors, and may have some insight here...
-V
