2007-01-15 07:47:52 · 9 answers · asked by mandal_manchester 1 in Science & Mathematics ➔ Engineering
This would depend very much on the current the item draws from the 12 volt supply. The more current the more cost.
Example. a 100watt light bulb on 240v all night will be a lot less to run than a 7000watt electric fire on exactly the same voltage.
This means that voltage is not the relevant factor when it comes to cost.
Hope that makes sense,
Martin
2007-01-15 08:01:52 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Power Consumption = Cost = Bye Bye Money
Power = Voltage x current
~12V would be DC or Direct Current
~ The electricity or power received from your home or the 'grid' is AC or alternating current
~ Hence, unless you are using a DC source such as solar panels or batteries, you will need to convert the AC power source to a DC power source. All converters will consume a small amount of power due to inefficiencies and other factors such as heat loss.
~ So, the power needed to run for a whole year would be the current draw multiplied by the voltage + Losses in your wiring(system) and Converter(if using an AC Source)
2007-01-17 16:51:39 · answer #2 · answered by Honest Bullshit 1 · 0⤊ 0⤋
To anwer your question one needs to know the Current or the Power you need. Power from mains costs about 10 Pence per Killowat Hour
2007-01-15 08:03:44 · answer #3 · answered by Les C 1 · 0⤊ 0⤋
well the electric company charges you a specific amount for a kilowatt hour (if the device you have is ul listed you can locate the lable and read it and find the watt value, and other values of the device and use this formula)
this will also come in handy if you want to figure out your next energy bill
wattage*time in hours*amount charged by kilowatt hour/1000=price
2007-01-15 10:06:54 · answer #4 · answered by macgyver 1 · 0⤊ 0⤋
The voltage alone is not sufficient to solve this question.
You need either the amperage draw or the wattage it consumes and the cost of electricity per KWH in your area.
2007-01-15 08:02:26 · answer #5 · answered by LeAnne 7 · 2⤊ 0⤋
It depends upon a number of things such as : size of the battery in VA and the power output in watts.
2007-01-18 05:16:38 · answer #6 · answered by Sam 4 · 0⤊ 0⤋
It depend how much electricity is in your area.
2007-01-15 07:56:40 · answer #7 · answered by Steelroar 2 · 1⤊ 0⤋
You need to know the amount of current that's being drawn, e.g. 230v*2A = 460w. 12v*40A = 480w.
2007-01-15 08:30:49 · answer #8 · answered by Anonymous · 0⤊ 0⤋
You have to know the amps to find out.Peace
2007-01-15 07:56:53 · answer #9 · answered by Anonymous · 1⤊ 0⤋