No, it would be to replace the WFCO that came on our new Sunseeker. We are dry camping, have only 100w solar, and had some clouds. I figured since I was going to be changing to something better someday, why not now? I did find one in stock but he wanted full list, $276. Yikes. We have only a few more days of dry camping so I guess I'll wait and plan things out a bit.
Yesterday we started out at 12.0v, and I had to run the Onan for 3+ hours, just to get the batteries to a point where I thought the solar could finish me off to at least 80%. As it turned out, I did better than that. This AM we are sitting at 12.4v so with any good sun today I should be in good shape.
I feel the WFCO performed poorly. I know there are tricks to getting it to boost mode, and I'll have to research that here. Unless anyone cares to post it. :) Probably it wouldn't boost because I already had solar charging coming in when I fired up the gen. Anyway, then I added the MexHarborCharger to the mix and between all of them working against each other I was able to get a whopping 20a. :/
I knew I should have brought the B&D 40a charger but I was trying to save space. I just didn't count on a cloudy day in AZ. :) Anyway, it's all good today, and if I get drawn down to 12.0 again, I'll see what I can do to fool the WFCO into boost. Still, when I get home, that WFCO is done for.