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RV electrical ??
toad67
Member Posts: 12,400 ✭✭✭✭
Need to replace my 12 volt rv batteries since they wont go a day and are 6 years old. Going to go the 2-6 volt way. My question is that when the rv is hooked up to power (110) and the batteries are charging thru the inverter, wouldn't the inverter be putting out 12 volts to charge the batteries? Does a person need to change the inverter also? Thanks.
Comments
Depends on how you hook up the Batteries.
The batteries are after the charger..
Merc
Why would you go to two 6 volt batteries instead of one 12 volt battery? Makes no sense electrically or financially.
Merc
http://www.rvdoctor.com/2010/08/rv-batteries-6-or-12-volts-that-is.html
Two 6 volt 100 amp hour batteries will only produce 100 amp hours at 12 volts when wires in series.
Two 12 volt 100 amp hour batteries will produce 200 amp hours at 12 volts when wired parallel.
Why would you want to use two 6 volt batteries when you can double your amp hour output with two 12 volt batteries that take up the same space?
Some of the old foreign auto's had 6 volt bats connected in series for 12v and it was a very bad idea. 6 volt auto bat's are going or have gone way of dinosaurs. Anyone that says you need 6 volt bats is full of BS and probably a battery salesman, (the 6 volt person saying so has brown spots around his mouth and it won't wipe off, it's permanent BS on his lips)[:)]
6 volt bats in series are only as strong as the weakest bat and 12v bats in parallel are only as strong as the weakest bat.
Stay with your existing 12v battery arrangement and forget the BS you are hearing and reading about converting to 6 volt bats.
Some of the old foreign auto's had 6 volt bats connected in series for 12v and it was a very bad idea. 6 volt auto bat's are going or have gone way of dinosaurs. Anyone that says you need 6 volt bats is full of BS and probably a battery salesman, (the 6 volt person saying so has brown spots around his mouth and it won't wipe off, it's permanent BS on his lips)[:)]
6 volt bats in series are only as strong as the weakest bat and 12v bats in parallel are only as strong as the weakest bat.
I understand where you are coming from on the 6v auto batteries. What I'm going to do is go with golf cart type batteries, which cycle a lot better. The 6v batteries have solid lead in them and hold power longer, rather than the 12 with porous lead. Read the first paragraph on my link and it makes sense. A good 6v deep cycle can be $100-$350 each though.
Click on the battery link within the link:
http://www.loveyourrv.com/trojan-battery/
http://www.rv.net/forum/index.cfm/fuseaction/listings/forum/26.cfm
I do not get it either. For example..
Two 6 volt 100 amp hour batteries will only produce 100 amp hours at 12 volts when wires in series.
Two 12 volt 100 amp hour batteries will produce 200 amp hours at 12 volts when wired parallel.
Why would you want to use two 6 volt batteries when you can double your amp hour output with two 12 volt batteries that take up the same space?
I have mine hooked to an AB switch. Normally that switch is on A+B so they both charge or power the system at the same time But if I am dry camping I can run the first one till it's dead and then switch to the second. (and then independently charge the first one from a solar panel or the truck.) In storage both batteries are disconnected....
http://www.batterysales.com/inverterfaq.cfm
I've been told that 2 x 6 volts in series turn out more amps to the starter but I'm not convinced nor do I think it's a viable solution to the need for higher amps at the starter.
Since a camper isn't a high amp drain but a steady low amp draw, I don't see the advantage of 2 x 6 volts in series vs. 2 x 12 volts in parallel.
quote:Originally posted by LesWVa
I do not get it either. For example..
Two 6 volt 100 amp hour batteries will only produce 100 amp hours at 12 volts when wires in series.
Two 12 volt 100 amp hour batteries will produce 200 amp hours at 12 volts when wired parallel.
Why would you want to use two 6 volt batteries when you can double your amp hour output with two 12 volt batteries that take up the same space?
I have mine hooked to an AB switch. Normally that switch is on A+B so they both charge or power the system at the same time But if I am dry camping I can run the first one till it's dead and then switch to the second. (and then independently charge the first one from a solar panel or the truck.) In storage both batteries are disconnected....
This A/B switch is not useable with only two 6v bats in series so as to select just one bat.(would need 4 6v bats to get eq to 2 12v bats.
Switch is a good thing for two 12v bats in parallel as you mention.
Also 6v bats in series does not add the amp/hrs (voltage adds) where as 12 bats in parallel the amps/hrs of each 12v bat adds. Amp hours are what you are trying to gain.
The 6v bats toad is referencing costs about $363 each plus tax and maybe shipping and new cross connecting wiring which will cost approx. $40.
In answer to your question, the inverter will be ok and the charger ok, UNLESS some Bubba starts connecting things same as the 12v bat's or makes wrong connections and causes the inverter and charger to flame out. If you had the space available it would be more user friendly and $$ ahead to add more 12v bats in parallel for more a/hrs.
RV's like Marine electric systems have unique issues. Keep it simple.
quote:Originally posted by CaptFun
quote:Originally posted by LesWVa
I do not get it either. For example..
Two 6 volt 100 amp hour batteries will only produce 100 amp hours at 12 volts when wires in series.
Two 12 volt 100 amp hour batteries will produce 200 amp hours at 12 volts when wired parallel.
Why would you want to use two 6 volt batteries when you can double your amp hour output with two 12 volt batteries that take up the same space?
I have mine hooked to an AB switch. Normally that switch is on A+B so they both charge or power the system at the same time But if I am dry camping I can run the first one till it's dead and then switch to the second. (and then independently charge the first one from a solar panel or the truck.) In storage both batteries are disconnected....
This A/B switch is not useable with only two 6v bats in series so as to select just one bat.(would need 4 6v bats to get eq to 2 12v bats.
Switch is a good thing for two 12v bats in parallel as you mention.
Also 6v bats in series does not add the amp/hrs (voltage adds) where as 12 bats in parallel the amps/hrs of each 12v bat adds. Amp hours are what you are trying to gain.
The 6v bats toad is referencing costs about $363 each plus tax and maybe shipping and new cross connecting wiring which will cost approx. $40.
In answer to your question, the inverter will be ok and the charger ok, UNLESS some Bubba starts connecting things same as the 12v bat's or makes wrong connections and causes the inverter and charger to flame out. If you had the space available it would be more user friendly and $$ ahead to add more 12v bats in parallel for more a/hrs.
My post was to amplify on LesWV comments questioning why have 2 six volts at half the amp hours. Certainly an AB switch on 2 six volts would be as worthless as the hind teats on a boar.