Replant wrote: Coach-man, what happens if you use the true deep cycle for starting? The reason that I ask is when I, and probably most others, turn my key to start both my marine battery and chassis battery are hooked together hence I'm drawing from both, albeit for just a short time.
Deep cycle batteries are designed to run down very low, albeit over a long period of time! Start batteries are designed to take a "Big hit" when starting but only on a very short time frame! Thus the difference between the two designs. Now you purchase a "Marine deep cycle" battery and expect it to do both things well? Either it is able to produce big amps over a short period, Or it is designed to produce a lot of amps over a long period of time! Which one did you buy? If there were a "magic battery" that did both, then all batteries would come that way! The problem is it is either one or the other! If you use the transfer switch to help start the engine now and then, the "start battery" takes the hit while the "deep cycle" adds that "extra" to get you going. Do that every time you start and both batteries will DIE! Buy what you want, but those are the facts and IMHONever buy a "Marine deep cycle" battery it is like trying to teach a pig to sing, it only annoys the pig!
Replant wrote: Coach-man, what happens if you use the true deep cycle for starting? The reason that I ask is when I, and probably most others, turn my key to start both my marine battery and chassis battery are hooked together hence I'm drawing from both, albeit for just a short time.
I don't think the batteries are hooked together when you are starting the engine. They are only hooked together when the ignition key is in the run position, same as the dash radio.
New T-105's cost $118 apiece locally. Camping World sells similar batteries for $75, supposedly almost as good as T-105's. I'll buy T-105's. My 2003 vintage T-105's are still working but probably should be replaced soon.
If I buy 2 Trojan T-105 6 volt Deep Cycle battery and connect them in series than will it also give enough power for the generator to start.My thinking is onan generator need power to start so true deep cycle batteries as are not starting batteries so how generator will be started.Do I have to start the engine to get generator started.By looking at Trojan batteries I found Trojan also have Trojan 6V Deep Cycle Gel Battery which do provide CCA 575 at 0 degree F and CA 825 at 32 degree F.Which one should I buy.
Replant wrote: Coach-man, what happens if you use the true deep cycle for starting? The reason that I ask is when I, and probably most others, turn my key to start both my marine battery and chassis battery are hooked together hence I'm drawing from both, albeit for just a short time.
I don't think the batteries are hooked together when you are starting the engine. They are only hooked together when the ignition key is in the run position, same as the dash radio.
Dusty
I do not know about your RV, but most, (all that I have seen), have a switch on or around the dash that allows you to connect the house batteries to the start battery in an "emergency" situation. That is what I was talking about! With the engine running the house batteries are usually isolated from the start battery via diodes, (allows the flow of electricity in one direction only), which allows the engine alternator to charge the house batteries, which has nothing to do with weather those house batteries are marine "deep cycle" or true deep cycle batteries. Oh and just some info that you may find interesting, if the battery in question ha a CCA, or Cold Cranking Amps rating, IT IS NOT A DEEP CYCLE BATTERY!
bill257 wrote: If I buy 2 Trojan T-105 6 volt Deep Cycle battery and connect them in series than will it also give enough power for the generator to start.My thinking is onan generator need power to start so true deep cycle batteries as are not starting batteries so how generator will be started.Do I have to start the engine to get generator started.By looking at Trojan batteries I found Trojan also have Trojan 6V Deep Cycle Gel Battery which do provide CCA 575 at 0 degree F and CA 825 at 32 degree F.Which one should I buy.
The Trojan's are good batteries! If you can get them at a decent price, they should last you for a long time if you take care of them, (do not overcharge, keep fluid level full, clean terminals periodically, etc.
We use two Interstate Group 29 12V AGM batteries in our motorhome. We drycamp a lot and I just use the main engine's alternator when traveling, or the RV's built-in converter and a very quiet 650 watt generator when camped, to take care of them.
They are about 6 years old and I have done nothing to maintain them except keep them charged and, for no good reason, dust them off occasionally. They're sealed and never need water and never corrode any metal around them. They can be mounted on their sides or upside down.
Many modern RV's come with two Trojan T105's connected in series. They are more than adequate to start the generator, it's not a truck engine so, it shouldn't require a starting type battery.
We replaced our group 24M deep cycle batteries with a pair of US Battery 31DCXC's.
These 12V deep cycle batteries are rated at 130Ah so a pair should exceed a pair of Trojan 6Vs. I would have gone with the Trojans, but they didn't fit in my battery box under the steps in our class C. The US batteries are not quite as tall and were the largest physical size I could find to fit my space... nice they were the most powerfully rated batteries I could find too.
Only been in for 3 months so I can't vouch for their reliability yet, but they are power brutes that hold up to our heavy use
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