The best voltage setting for a Discharge Preventer

[jimjones]

Can anyone give advice on the best setting when configuring the voltage on a discharge prevention device? I’m using a Power Magic Pro. The options are 11.8V, 12V, 22.8V, 23.2V. At what voltage is a battery useless? Is 11.8V half way to dead? Sorry but I know nothing about car batteries.

 

[rjgscotland]

12v for definite. 11.8 is really dead and allowing the battery to get that low will mean the car likely wouldn't start and also will damage the battery over time. Even 12v is a bit on a low side, something like 12.2v might be safer to ensure the engine will crank, but of course that's not an option on your unit. A bit over 12.8v is a fully charged battery.

 

[jimjones]

Thanks for your, help 12V it is.

 

[DashCamMan]

Hi jimjones,

This depends on temperature. You can read more about it here. 12V is a likely a reasonable number.

 

[jimjones]

Thanks DashCamMan good info. But if as rjgscotland says "12.8v is a fully charged battery" why does the Power Magic Pro have settings for 22.8V and 23.2V?

 

[jokiin]

Thanks DashCamMan good info. But if as rjgscotland says "12.8v is a fully charged battery" why does the Power Magic Pro have settings for 22.8V and 23.2V?

because the power supplies suit 12v and 24v applications

 

[jimjones]

So you mean it can work with a 12V battery or 24V battery?

 

[jokiin]

So you mean it can work with a 12V battery or 24V battery?

yes, the cigarette adapter and the power magic pro (and similar) support 12-24v input