Over the last few weeks I've had a problem with the battery on my Varadero not charging properly. It's a brand new Bosch battery, and I'm sure that it's okay. I'm not sure if the electrical system is doing its job though!

When idling with lights off, I measure 13 volts across the terminals.

When idling with lights on, I measure 11.8-ish volts across the terminals.

Do these figures sound right to you peeps? They sound low to me...

Could someone please give me an idea what is involved, cost and work wise, in replacing the alternator, if it's dodgy?

Ta!