Ahh, That's the big difference between many boats and land based PV solar systems. On boats, you can rarely just "add more panels". Since our traction banks are large and our space available for panels is limited, electic boats rarely get close to the 3-4% of capacity that you suggest.
On my ketch, every place I could reasonably mount a panel is shaded at least 50% of the day. So I have to make do with 0% of my rated capacity in PV for now. Someday I might go through the trouble of installing a movable panel with multiple mounting locations, but if I did, it would be rated to only 1% of my bank's capacity at best.
Eric
1964 Bemuda 30 ketch, 5.5kW Propulsion Marine drive, 8kWh lithium batteries
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "Steve" <sstuller@...> wrote:
>
> The rule of thumb for solar capacity is 3 amps to 4 amps output per 100 amp-hrs of battery capacity....
>
> There is no harm done if he is short because he can always add more panels. Thanks. Steve S.
>
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