Max power Ct 80 real Kw

[toniocask]

Hi all,
I've bought a max power ct 80 bowthrust, this item has 4,79 kw ( factory data sheets )
Why on the electric motor is written 3 kw?
Here the picture.
Thank's
Antonio

[Trevor]

Hi Antonio,

You present and interesting issue. From the brochure, the CT80 has a motor with a current rating of 446 amps with a full load voltage of 10.75 volts. That equals 4.79kW.

Your motor is rated at 360 amps at 12 volts equaling 4.32kW. If we assume 360 amps at a full load voltage of 10.75 volts that equates to 3.87kW.

Your motor is rated at 3kW which does not equate to the current and voltage shown on the label in the photo. I thought it may be the power output of the motor instead of the power consumed by the motor but it doesn't matter which way you calculate it, it doesn't seem to be 4.79kW. Perhaps a gentle query of the dealer may provide some reason why the numbers don't seem to add up.

If it is labelled a CT80 I guess it is correct but it would be nice to know why the specifications don't quite seem to correlate with the product brochure.

I guess as long as it pushes the front of your boat around ok the rest is academic but you would hope you haven't paid for a CT80 and had say a CT60 installed.

Regards,

Trevor

[toniocask]

Thanks Trevor,
I called Max power factory,
they tell me that 3 kw is the value of DC (3,5 min.use ), instead 4,79 kw is the starting value (5/10 sec.use)
I think it is correct, a bowthrust is used for a few seconds.
Thank's again.

Antonio
Alchimia S.Y.