[Rhodes22-list] Solar Panel Output

[Michael Meltzer]

Voltage x Current = Wattage
or
Current = Wattage/Voltage

I think the difference is you are getting you numbers from watching the link10 charges rate.  Your batteries might be pretty charged
up and are not drawing all the amps the panels can give.  The wire run will also give some resistance(or a corroded connection)
using up some of the power that will lead to the lower link10 numbers.

MJM

----- Original Message ----- 
From: "Bill Effros" <bill at effros.com>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Wednesday, July 09, 2003 10:18 PM
Subject: Re: [Rhodes22-list] Solar Panel Output


Jay,

The .2 and .1 numbers I provided are per hour.  I assume Michael's numbers are per 8 hour day per panel on sunny days.  Michael's
numbers are calculated.  Mine are actual, as measured on a boat very much like yours.

Bill


----- Original Message ----- 
From: Michael Meltzer
To: The Rhodes 22 mail list
Sent: Wednesday, July 09, 2003 6:51 PM
Subject: Re: [Rhodes22-list] Solar Panel Output


Jay, are they a matched set of batteries(i.e same age/trype/brand/usage), most likey one is weeker then the other cause the storger
to try to recharge it until they are flat(i.e. one draining to the other), it can be agrervatied by using to small a wire for to
long a distance that cause a voltage drop. davids isolator will help the problem.

Second off, at 10 watt panal should be about .9 amps at 12 volts each.

MJM

----- Original Message ----- 
From: "Jay Friedland" <a.jayf at verizon.net>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Wednesday, July 09, 2003 6:33 PM
Subject: Re: [Rhodes22-list] Solar Panel Output


> Thanks, Bill, I needed that!!!
>
> Seriously, I know I have a short some place but running checks across
> all 6 circuits hasn't turned up anything. Without being able to isolate
> it, I can only compensate right now. I know the cells aren't losing
> much, just trying to hold what I can as a trickle charge. It's been
> on-going since 1997, with some rewiring by a local marina guy, and then
> at NC. Loss of voltage over weekend twice was after 1/2 hr.+ running
> time on motor.
>
> Sat., I'll have a fresh set of eyes and meters. Next slip, an
> electrical engr. will help this weekend. Trying to do most of this
> without losing sailing time as well. You know what I have and it
> doesn't make sense-
> it's not that complicated. Will persevere till I nail it.
> Jay
>
> On Wednesday, July 9, 2003, at 01:15 PM, Bill Effros wrote:
>
> > Jay,
> >
> > Roughly .2 amps in bright direct sunlight--.1 when overcast.
> >
> > You are overcomplicating this problem.
> >
> > I have essentially the same equipment and use.  You must have a short
> > somewhere.  You are not losing this much power through your solar
> > cells.  You are not using this much power with your lights and sound
> > system.
> >
> > Your Yamaha should put more electricity into your system in 5 minutes
> > of running than your solar cells are capable of losing the following
> > night--and a fully charged 2 battery system should have enough reserve
> > power for more than 2 years of nights even if direct sunlight never
> > falls on the solar cells during the day.
> >
> > My E-Meter measures the discharge of the solar cells at night.  It is
> > accurate to .1--the discharge is less than that.  My system has
> > remained fully charged day and night for more than 5 years (although
> > the fully charged capacity has declined as the batteries have aged.)
> >
> > Find the short and stop fooling around.
> >
> > Bill
> >
> >
> > ----- Original Message -----
> > From: Jay Friedland
> > To: The Rhodes 22 mail list
> > Sent: Wednesday, July 09, 2003 6:47 AM
> > Subject: [Rhodes22-list] Solar Panel Output
> >
> >
> > List-
> > Can anyone tell me the output of the standard solar panels, I believe
> > Solarex, used from the factory? I'm still having a problem with voltage
> > loss with a 2 battery, 2 panel system with switch. Using only nav
> > lights and the 12v Cambridge Sound system, unable to start Yamaha
> > engine, except manually. Contemplating adding Starter batt. isolated
> > for engine only. I'm adding ICP charge controller this weekend as well
> > and take some measurements to see where I'm losing power.
> > Thanks,
> > jay
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
>
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
>

__________________________________________________
Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list

__________________________________________________
Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list