Hi Arby,
Thanks for the informed response. This shows the wisdom of making sure that you've got some headroom on your component ratings. With my controller and motor both running well below 100C at full throttle after an hour, I'm pretty confident that they'll be as reliable as possible. My charger has huge heat fins and forced air so it should stand up to the load. The component that is closest to it's rating is my portable generator, but it's only there for emergencies and I haven't had to run it under way, other than to test it.
For cruisers, sourcing everything from a global supplier gives a lot more confidence in getting things repaired if something does go wrong. It may not be the solution that I would choose, but Harmony seems to be well thought out and professional executed.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, Arby bernt <arbybernt@...> wrote:
>
> Harmony was an early Solomon beta conversion. After paying for the system twice again in repair bills, the owners tore out everything and went for a twin generator set-up. Every Solomon component was running at 100%, so when one system went out, the rest got strained to failure. The owners are neighbors of mine, and we've often spoke of the practicality of battery powered boats. 12 to 15kwh seems to be the limit of practical weight, then a genny after that. The original 6kw drives whacked the battery so hard, the original battery charger would overheat, low voltage would cause more throttle demand, the slowed motors baked and shorted. Now there are no traction batteries, with the original battery bay converted to an extensive house array. AC inverters run the cooktop and AC, twin gennys ensure reliable power. Every part is off the shelf Grainger. Grainger even extended a world-wide warranty to them, ensuring simple service.
>
> Arby Bernt
> Advancd Marine electric Propulsion
>
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