No John, The socket is live only with the ignition on..You will have to connect a fuse short adapter lead directly to the battery and lead the lead out so you can connect the optimate when you park up.
John, I've read where charging through the accessories outlet is OK but for ease of use, I'd suggest that you run permanent wires directly from the battery to a SAE connector and an in line fuse located near the battery. Does your Optimate charger have a SAE connection?
I've run a lead straight from the battery for my charger but shortened it so it dangles just above the gearbox casing. I also used the same connection on my heated jacket so now when the battery charger is'nt being used and I am out on the bike I leave the jacket connected all the time and just switch it on when required. So now I can charge the bike and myself aswell.:rofl