| Dear Ben, Your advice on legal recourse is insightful and well taken. Thank you. I won't make that mistake again. Marine rated brushed motors have a UL protocol to satisfy in order to get certified. I worked with UL, purchased the standards, and did some testing in my own "lab" (the bottom of an empty swimming pool, in case of an explosion I was out of the basin. It was cool to have a spark-plug sticking out of a brushless motor connected to a propane and compressed air tanks. Hybrid!). Vented brushed motors can be qualified, but they require a screen with openings not to exceed 0.050", Take a look at a marine rated alternator. They frequently fail(overheat) as a result of oily cooling air plugging the screens. I chose brushless Motorola alternators for my cabin cruiser as a result. They are intrinsically safe have open cooling ports. I have no interest in selling WFCO products, but would like the group to profit from my experience. The 55a units that ran off the Honda 2kw were not at full power. I like to keep lots of headroom, and advise a maximum continuous usage at under 75% duty cycle. The Kelly controllers we use are programmed to 60% output. I'm glad to hear that the Elco units are working well. I just installed 2kw (back-up) and 8kw units running at 300vdc on my own Skipjack project boat. I'm an engine'er, not a sailor. I've removed one of my ancient AQ170 engines and will be installing a 180kw peak, 30kw continuous, water cooled brushless motor and controller in its stead. Yes, I know there's no way I can power wide open it for more than five minutes, but I need 140kw to pop the boat onto plane. Then the remaining AQ170 will be able to keep it there. I'll post some pictures when it gets done, in about 50 years...When finished, the hybrid boat will be able to fish in silence. The idling ICE was nasty when trolling, but there's no way I could run the 40 mile round trip out of the Golden Gate on battery alone. Having 110 gallons of fuel works out to a lot of battery. My 96 cell 40aH lithium string came from Sky Energy, in case anyone is wondering. Should anyone require the same, I don't advise purchasing chargers from Sky Energy. The first 8kw unit looked like it had been shipped in a cement mixer, and its replacement, which I had to pay 50% and shipping, was even worst. I've been working with a Coast Guard Auxiliary officer who inspects boats for conformity. So far, he's found three problems, all related to fuses. 300vdc fuses and disconnects are everywhere, as the pack is split for placement. You get 7" and/or 48v before a fuse or disconnect is required. Another problem is the GFI. I found a LittleFuse system designed for mining equipment, but it isn't "marine" grade, according the CG. Be Well, Arby --- On Tue, 7/26/11, Ben Okopnik <ben@linuxgazette.net> wrote:
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