| Author |
Message |
T. (Bluegrass)
Registered Member
Username: Bluegrass
Post Number: 219
Registered: 4-2002
Posted From: 72.160.138.242
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 8:35 am: | |
what kind of storage battery to use for an Inverter and how many, & why. |
Bob greenwood (Bob_greenwood)
Registered Member
Username: Bob_greenwood
Post Number: 385
Registered: 7-2006
Posted From: 4.226.108.29
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 8:59 am: | |
kinda depends on your 'demands'...what do you plan to power & for how long ?? |
Arnold J Molloy (Ayjay)
Registered Member
Username: Ayjay
Post Number: 43
Registered: 10-2005
Posted From: 151.203.103.166
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 9:12 am: | |
Hi:
Type=Deep Discharge, wet or AGM
How many= as many as you have money and space for
Why= Cuz |
George M. Todd (George_mc6)
Registered Member
Username: George_mc6
Post Number: 41
Registered: 8-2006
Posted From: 207.231.80.150
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 11:53 am: | |
Good morning, T,
The two posts above are exactly correct. Without knowing what you want to run, and how long you want to run it without running either a generator or the main bus engine, we can't help you.
However, here are the electrical calculations you need to use to figure it out yourself:
DEEP CYCLE BATTERIES are rated in ampere hours, so a current draw of five amps for one hour=FIVE amp hours! Do NOT figure on more than 70% of that number being available.
The electrical unit of work is described as Watts, which is the volts times the amps, also written as "VA."
Your inverter SHOULD be rated at 150% of the total load you expect to put on it, then you won't have motor starting problems. Be also aware that inverters give off a lot of heat while running, and can't be installed in an un-ventilated compartment!
Now, for sizing calculations, ASSUMING the inverter is 100% efficient, (which none of them are.) 1 amp at 120 volts equals 5 amps at 24 volts, 10 amps at 12 volts, and 20 amps at 6 volts. If you have a 24 Volt bus, you will need at least two 12 volt batteries wired in series, or four 6 volt batteries also wired in series.
Figure the wattage of your appliances, divide that number by the battery voltage you are going to use, add 10% to that number for inverter loss, which will give you amp draw on your batteries. Then multiply that number by the hours you want to run between charges, add 30% to that for what won't come back out of the batteries before the inverter stops for low voltage, and buy batteries accordingly.
HTH!
George |
JJ Woden (Jj_woden)
Registered Member
Username: Jj_woden
Post Number: 7
Registered: 10-2006
Posted From: 65.19.246.49
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 2:44 pm: | |
Does the search engine within Yahoo search on subject line or on content? If it is subject line can this one be changed to something relevant with batteries? Maybe posters could make an effort in this direction. (Rather than confuse it with a dating service. (Just Kidding))
I read this board from cover to cover, and this info will be exactly what I need. A simple change will make it easier to find. Thanks.
JJ |
Mike Eades (Mike4905)
Registered Member
Username: Mike4905
Post Number: 129
Registered: 12-2000
Posted From: 68.207.200.143
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 4:46 pm: | |
T. I have three 8 d bus batteries for my 2500 combi inverter. works all but hot water heater or roof heat strips. I run one ac unit which is 15k without a problem. Mike |
mark (Coolbus)
Registered Member
Username: Coolbus
Post Number: 32
Registered: 7-2006
Posted From: 71.1.128.196
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 28, 2006 - 12:08 am: | |
JJ
thanks for pointing out the posters lack of a 'good' subject line...
T (bluegrass) and others, not to complain, but...
it would really be nice if a little more thought went into the subject line.
Please note that this request is made with only good intentions, not to offend anyone!
The subject line should be specific, like a 'theme' of what the post or question is about.
for example in T's post; something like: "Question about battery banks"
thanks!
Mark |
mark (Coolbus)
Registered Member
Username: Coolbus
Post Number: 33
Registered: 7-2006
Posted From: 71.1.128.196
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 28, 2006 - 11:08 am: | |
I should have known SOMEBODY would get offended by my above post.
The reason for the subject line is so that when searching the archives, it can be found later .
Tony, whoever you are, I got your private email, like I said in the post, I wasn't trying to complain; sorry if my post offended you.
Mark |