Or maybe it should say how not to. We'll see. So you guys and gals know the drill. Canadian BJ42's are 24V. How cool right? I really used to think so. I mean, yeah it's kinda neat, but with only about 30A to work with how does one add any cool stuff like compressors, fridges, lights or just FM radio? There are any number of ways I suppose. For the last couple of years I have been using a solar voltage converter generously donated by Peter to get 12V. More accurately, the solar thingy cuts whatever voltage fed to it by half. It also works both ways and will take your 12V power and charge your 24V system with it. I am current-ly feeding that 12V power to a really nice AGM deep cycle battery from Canadian Tire. It's a good battery. I have TOTALLY killed it numerous times and she takes a charge no problem still. But something in my 12V sub-system is a parasite. Maybe just the loss through the conversion or something. I have left my cheap 600w inverter on a couple of times and it has a known draw even when not in use. Bottom line is I want a better system. For a while now I was looking at getting one of these Cooper Bussman Converter . They go on ebay for $100 sometimes used. $350 new. But, as Coastal Kevin pointed out there is a reason the entire case is a heat sink. Prolly has a lot of loss. Several people have suggested I just add another alternator and run a dual system. I scoffed at the idea for a long time thinking that the bus converter was the shiznit. It was while explaining to my son about heeding the advice of your elders that I realized I was not doing that very thing. Not that you guys are old but rather, as Jimmi would say "experienced". It made sense really. I had already purchased the required pulley and tensioner for a 3B accessory drive when I was building a York compressor system for the now defunct 3BT for the 45. I got it at SOR for the reasonable price of $70. This is the crank pulley and timing cover tensioner that was used for the factory air on an 83/84 40 series. A pretty rare part really. All I needed to do was get an alternator and make a mounting bracket to hold her still.