Dropped by my dealer and borrowed a G24 to see if it would fit the spare tray in my Silvy and indeed it does - perfectly. :B Discussing this project with the service manager we both came to the same conclusion that I'd be best to stick to my original plan of installing a single G31 AGM in the front pass through close to the inverter. If I find the single G31 isn't sufficient for the way in which we use the camper I can then always go on to Step 2 which is to buy a G24 AGM and park it on the Silvy's spare battery tray. I'd always leave home with both the G31 and G24 fully charged so if I draw the G31 down before we're done camping I'll have a fully charged G24 sitting there as a spare. If I find I frequently use the reserve provided by both batteries and would like a means of recharging while still camping I can then move on to Step 3 which is to invest in this new CTEK DC > DC charger. The biggest advantage is that spreading the costs over time will make the entire project a lot easier to justify. :B
