I would be very interested in hearing where you found these panels. The highest voltage I have found is around 35 volts per panel..
Rgds Peter
From: electricboats@yahoogroups.com <electricboats@yahoogroups.com>
Sent: Wednesday, November 7, 2018 11:35 AM
To: electricboats@yahoogroups.com
Subject: [Electric Boats] 70 volt Solar panels
I just ran across 70 v - 100 watt solar panels at $65 ea. Do 70 volt panels make sense on a boat used at a lake about 6 miles across. If used with 6 nominal batteries (72 volts / 80 Amps) and a golf cart motor controller,
the motor has a typical gearbox 2.83 to 1 and a Martec folding prop 12 x 12
A. At full sun, does 70v (4 panels) 400 watts mean that a 36/48 volt motor with only 400 watts will try and turn full speed but with 2000 lbs hull displacement, it will max out at 400 watts going about 3 knots?
B Does 70v try and overheat the motor, (as described above) or is 400 watts the power that the motor is absorbing with no issues.
Thanks to all for looking -Ray
Posted by: "Peter Beckett" <pcbeckett@gmail.com>
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