hi mab,
thanks for the reply,yes im new to off grid living and dont have a clue when it comes to 12v batteries/battery banks.ive being doing a bit of research so i can have power at a off grid property that i own but im getting conflicking feedback with regards to setup and size.this link is to a diagam of what i think is needed from what knowlage i have gained so far,
[img=http://s20.postimage.org/9g4rqttnd/2_solar_panel_battery_bank_setup.jpg]but i still dont know what AH is,is it the charge of the battery when full or is it the amount of charge it releases in a set time (eg-120ah battery will release 120ah in a one hour period).ive being looking at the trojon batteries but they go from 12v-34ah to 12v-120ah and im not sure which is the battery/batteries id need.
below is a reply i got from another site however i ve now found out it is mainly usa/canada users and they have a differant setup and possibly more sun.
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The system that you gave the specs for looks nice. Under extreme conditions, the Sound Bomb (With the twin pizeos singin') would consume ~2 aHr/24 hours. In armed/stand-by.. .264 aHr.. *Alarm state.. .312 aHr.. (Plus the sound bomb)*
It'll work from a 12 volt battery with ease. Worse case scenario, it would use ~4 aHr/day! A small marine deep cycle battery, a 30 watt panel, and an ElCheepo charge controller and you wouldn't need to touch it. Ya gotta have a little sunshine there sometime during the day..
Most standard marine deep cycle batteries are rated ~60 aHr. The 25% safe discharge level would be ~15 aHr. In stand-by mode, a fully charged battery would last over 50 days! The sound bomb is what sucks the juice. With the sound bomb screamin' it would still work for ~4 days..
If you're going to be there once a week, just use a set of jumper cables and charge the battery with your vehicle. That should cover things until ya come back next week..
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these are the things that will be run of the system that really need to be connected ( not tv)and their power useage's are
security cameras-10ah
alarm-13ah sound bomb 80ma(what is ma?)
house lights 11w each -maybe 5/6 used at any one time and only on a night(max say 70w)
security spot light 4 lights x 3w each on sensor's so only one or two will be on at any given time when movement is detected.
heating pump for the cental heating -0.38a ( only used when we are there )
tv - 36w
all advice and diagrams are greatly recieved
rob