Re: [electricboats] First run

Sounds like a data range/wraparound issue---could be a parameter isn't configured right or perhaps the wrong shunt or ???

 

From: electricboats@groups.io [mailto:electricboats@groups.io] On Behalf Of MATT
Sent: Monday, August 31, 2020 10:11 AM
To: electricboats@groups.io
Subject: Re: [electricboats] First run

 

Hi Ryan, 

We also just launched a couple weeks ago after our big conversion.  Right now, we are using the CAN translator and the Torque app on my android tablet which is supposed to show amps out, watts, and SOC% but none of those are working correctly.  When I get up to 16 amps, it resets to 0 and starts counting up again.  Since the watts are calculated from the amps, they also reset at about 1250 and start back at 0.   It is hard to trust the numbers when it's doing that.  I'm in touch with Thunderstruck to try and figure out the issue but nothing yet.  We use the Curtis battery monitor to show the SOC and it works pretty well.  Link HERE.

We also are having a hard time getting the alignment just right.  Pretty much exactly as you said, the shafts look aligned but the prop shaft is not perfectly straight through the cutlass.  We get some vibration, especially at higher RPM.  What surprises us the most is the very high pitched whine that comes from the motor.  It's far from silent.  I don't know if it's normal or if maybe the belt is too tight.  Do you have a gear reduction?  

Here are our very very preliminary numbers considering the watts I'm showing are slightly untrustworthy.  We are also in the puget sound where it's damn near impossible to get away from any currents and our speed log doesn't work, so we are relying on SOG.  Boat is a 39', 20k lb, sloop with the motenergy 1616 at 72V and 180ah (13kw) bank.  17'' 2 blade maxprop.  

WATTS   RPMS    SOG(KTS)
1000       1500       3.1
2100       2000       3.7
3600       2500       4.5
6000       3000       5.6

Let us know how your shaft alignment goes.