Great info coming in Guys THANKS!,
Totally (pleasantly) surprised at the Propulsion Bank votes, it’s really the way I would prefer to go and seemed to be in line with the rest of the system. I’ll look at some equipment tonight on the net and see what you all are talking about.
I don’t know if shading is going to be an issue since both panels will be side by side off the back of the boat so if one is partially shaded they probably will both be. The boom shouldn’t come into play but I will look into it. I also thought the MPPT controllers were to take care of the partial shading with the diodes in the panels but will listen to the ideas being thrown out there. Please keep it coming!
Steve in Solomons MD
Lagoon 410 SE
From:
Sent: Wednesday, June 27, 2012 2:26 PM
To:
Subject: Re: [Electric Boats] Help with Solar Panels Please
Hi Carter and Steve
The reason for suggesting two controllers is to get the best output from the solar array. When one panel is shaded its voltage and current will be different to the other panel. A single controller will not be able to see the difference and will be trying to optimise the output for the combined output which can be choked by the shaded panel.
If they are separately controlled the MPPT device can have the best opportunity to optimise the output for the particular voltage/amps combination of that panel.
Cheers
Chris
On 28/06/2012, at 4:00 AM, Carter Quillen wrote:
I wouldn't spend the money on two controllers because the panels have blocking diodes in them to address the partial shading issue.
Also, check the Xantrex C series controllers, I think you might be able to use one in conjunction with your MPPT charge controller to get where you want. The C series can be condigured as either a PWM charge controller or a load diverter.
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