Thoughts on Leisure battery powering radio when car is in "economy mode"

[AlRamsay]

Hi All,

I've got a 2017 Berlingo Multispace (Feel edition, I think).

I'm thinking of adding a leisure battery under the passenger seat and charging it via a Dc-Dc battery charger because I'm told that a voltage sensitive relay won't work with my alternator... I'm looking at the Renogy DCC1212-20 if anyone has any thoughts on this.

However, the real question is, Can I back feed power into the radio when the car goes into "economy mode" and everything shuts down so I can continue to listen to the radio when parked up or am I opening a can of worms I might not be able to close again?

Thanks in advance

Al

[smutts]

Which genius came up with that "economy mode"? At least with my M59,

Making you have to restart the engine every ten minutes or so, so that you can listen to the radio.
A French Fail.

If it was called "Anti silly sod mode" and it cut the radio & lights after say an hour, it would be A Gallic Great Idea.

[jtr rhyl]

Not impossible to do it, but make sure its fused well. Thinking of doing it myself. As smutts its a daft idea, but for those that leave it on all night, its great! But minority over rules the majority, or as  smutts said, Making you have to restart the engine every ten minutes or so, so that you can listen to the radio.

A French Fail.

[Drummond]

Hi All,

Can I back feed power into the radio when the car goes into "economy mode" and everything shuts down so I can continue to listen to the radio when parked up

I’d assume stock radio gets the economy state from canbus and thus would not play even if it is powered elsewhere. Not sure about this though.

With aftermarket stereo you definitely can feed direct +12V trigger. I have done this with a toggle switch: either stock switching wire or from fuse holder with constant battery voltage.