[RE-wrenches] evergreen panels diode problems

[jay peltz]

Hi Peter,

What I'm curious about is at what voltage does this occur.  48, 160???

I have 3 in series  on a ungrounded system for 2 years now and are  
working just fine. Output is what is should be and no problems.

I know that Sunpower has a white paper that shows at lower voltages  
there is no problem, but above 180v ( if memory serves) there are  
problems.

jay

peltz power


On Sep 22, 2008, at 10:01 AM, ASAP POWER! 2 wrote:

>
> Bill,
> I think Doug P. actually sent this to us.  Hope attachments work on  
> this
> list.  I think I've seen them before in my inbox from others, but if  
> not,
> request off-line.
>
> Peter D.
>
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Bill  
> Brooks
> Sent: Sunday, September 21, 2008 10:28 PM
> To: 'RE-wrenches'
> Subject: Re: [RE-wrenches] evergreen panels diode problems
>
> Doug,
>
> I'd like to see the bulletin about why they could not positively  
> ground
> their modules. It seems quite odd.
>
> Positively grounding a module in general should have no effect on a  
> typical
> module. As to why it helps the SunPower module, they have an  
> explanation,
> but I'm not convinced it is true--it just works--and that is all that
> matters.
>
> Bill.
>
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Doug  
> Pratt
> Sent: Saturday, September 20, 2008 5:25 PM
> To: 'RE-wrenches'
> Subject: Re: [RE-wrenches] evergreen panels diode problems
>
> Jay, there was a bulletin from Evergreen earlier this year about their
> modules being used in positive ground systems. I don't remember the  
> exact
> details (and I'm not at work now), but the gist was avoid positive  
> ground
> till we make some modifications. Please check w/Evergreen on Monday.
>
> -Doug Pratt
>
>
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay  
> peltz
> Sent: Thursday, September 18, 2008 5:24 PM
> To: RE-wrenches
> Subject: [RE-wrenches] evergreen panels diode problems
>
>
> Hi All,
>
> I"ve got two evergreen 170 watt panels with bad bypass diodes in them.
> In service for under 2 months.
>
> Only odd thing is that this is a positive ground system.
>
> They are running at 3 in series for a 48v system.
>
> Anybody else have problems with them?
>
> thanks
>
> jay
>
> peltz power
>
>
>
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