GARY ENGLISH
Guest
Is there a formula to work out how much power, a item will draw from the battery.
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paulamy
Guest
dont know if this will be of any help http://www.boatus.com/boattech/12volt.htm
virgil
Guest
I have no idea with electrics! Its like a cow looking at a watch!
GARY ENGLISH
Guest
Electrical
Paulamy thanks for that web site ,very helpfull.
Paulamy thanks for that web site ,very helpfull.
Trevor
Guest
no idea with electrics
If you dont have any luck try, s.b.m.c.c Forum.
Here is the link. http://www.sbmcc.co.uk/
virgil said:I have no idea with electrics! Its like a cow looking at a watch!
If you dont have any luck try, s.b.m.c.c Forum.
Here is the link. http://www.sbmcc.co.uk/
Last edited:
Nosha
Guest
Current draw
Graham, remember Volts x Amps = Watts... therefore if you have an item that quotes its wattage such as a TV or a bulb, then Watts / Volts = Amps!
Your battery will have an amp/hr rating on it so you can start to get an idea of how long the battery will last with your current/amp draw on it.
I have also found that leisure batteries DO work, i.e. they REALLY do cope better at suppling a small draw for a long time, rather than an engine/starter battery that's designed to give a lot of power for a short time... but DON'T try and use a leisure battery for jump starting a flat engine battery as the huge current draw will buckle the plates and ruin it VERY quickly!
Graham, remember Volts x Amps = Watts... therefore if you have an item that quotes its wattage such as a TV or a bulb, then Watts / Volts = Amps!
Your battery will have an amp/hr rating on it so you can start to get an idea of how long the battery will last with your current/amp draw on it.
I have also found that leisure batteries DO work, i.e. they REALLY do cope better at suppling a small draw for a long time, rather than an engine/starter battery that's designed to give a lot of power for a short time... but DON'T try and use a leisure battery for jump starting a flat engine battery as the huge current draw will buckle the plates and ruin it VERY quickly!