I agree with your numbers Jason, but with 2.7kwh available, that trip should be easily doable.
Assuming that your boat uses about 2kw to do 4.5mph (444wh/mi), it likely requires only 500w at 2.5mph (160wh/mi).
Even assuming as high as 250wh/mi for 2.5mph, 2.7kwhr of usable pack energy should allow a 10mile round trip.
-Myles Twete, Portland
Usable: | 2.7 | kwh | ||
Distance: | 5 | mi | ||
Speed | Distance | Time | Power | kwh/mi |
4.5 | 2 | 0.444444 | ||
3.5 | 1 | 0.285714 | ||
2.5 | 0.4 | 0.16 |
From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of Jason Taylor
Sent: Friday, January 03, 2014 7:49 AM
To: electricboats@yahoogroups.com
Cc:
Subject: Re: [Electric Boats] DIY Hybrid System Questions
A 5 mile trip at "low speeds" will be around 2 hours. Is this one way or return?
You would definitely need the 200AHr pack to operate under battery alone.
As it stands, with a 72AHr lithium pack, you're looking at about 57AHr usable.
I am assuming a 48V nominal voltage do that is a 2.7kWHr pack.
On Jan 3, 2014,
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