2013 XV Diesel battery going flat.

[Knuwilko]

I replaced a flat Battery and now after a month with only a little driving and a fair amount of standing for 3 days it has gone flat again

Could this be an alternator problem? (I fitted a replacement alternator pulley.)

No warning lights about charging?

I believe the model is not fitted with auto-start/stop.

[Tidgy]

Could be its not getting charged correctly or there could be a drain, do you have anywhere that offers free Battery checks local?

they should be able to check if the alternator is working correctly.