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In regards to regenerating, what speed does the boat need to sail before regenerating kicks in ?

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In regards to regenerating, what speed does the boat need to sail before regenerating kicks in ?

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Regenerating starts at approx 5 knots but it doesn’t give much at that speed. The amount recharged is dependant on the hull, placement of rudder and prop, size and ptich of prop etc. Tests in different boats have shown: 5 knots: 100-250 watt 6 knots: 150-400 watt 7 knots: 200-600 watt For comparison, our 2 x 150watt (total 300w) Bp solar panels which we have fitted to our boat recharge at about 5-6 amps per hour in summer. The controller is programmed for a maximum voltage output at regeneration. An amplifier optimises the regeneration at the current speed. As a general rule, the recharging starts at approx 5 knots and doubles, when you go up one knot. We only recommend to recharge up to speed of 10 knots – as we assume you will here reach the max RPM for the engine. Further the motor is as good as a generator – as an engine. The amount of recharging therefore depends of your sailing speed, the chosen prop and where the engine is fitted. The folding prop’s are about 5-10% less effectiv

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