Trojan recommends charging with a standard charger every month or so during storage . Which is probably good enough. But i do know that to get maximum battery lifetime, professional companies, such as for telephones use a constant voltage float charger avoiding the need for a monthly big charge altogether and avoiding battery cycling. The maintaining current is very small so a light cable at 36 volts could be used rather than a line chord .
Chris S
--- In electricboats@yahoogroups.com, Matthew Geier <matthew@...> wrote:
>
> On 28/06/10 19:47, hardy71uk wrote:
> > 6 weeks since a charge seems a long time . I would have thought you should be trickle charging contiuously at less than 1 amp to maintain the battery except when recharging after a run.
> >
> I don't have an external power socket, the boat is charged by putting
> a power cord under my front door. One of these days I need to get an
> external weather proof socket on the side of the house where the boat is
> parked.
>
> And the Delta-Q charger actually shuts off entirely when it's fully
> charged, I assume if left powered, at regular intervals it would tickle
> the batteries to keep em topped off.
>
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