Further to my comments about fitting the Rutland 913 to my 37. I have now used it for 4 months whilst cruising from the Medway to Stornoway and half way back. I can recommend the Rutland 913. We have had no problems and it has dramatically reduced our use of the engine for the refridgerator. Our only comment is that in gale force winds it seems to disconnect and go into superdrive (not charging) and emits a loud screaming noise as the revs go up dramatically. No doubt this is to either save over charging or protects the Rutland.