MX60 question [RE-wrenches]

[Marco Mangelsdorf]

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Bob,
That's a 24 volt nominal module with a Voc in the 40+ V range, right?  The
BP3160Q is an oddball module with a 23.8 Vmp and 30 Voc.  So four in series
here in the tropics shouldn't come close to the 140V max for the MX60, right
Prince of the OutBack?

marco 

-----Original Message-----
From: Bob Ellison [mailto:ellison at gisco.net] 
Sent: Sunday, September 19, 2004 6:51 AM
To: RE-wrenches at topica.com
Subject: RE: MX60 question [RE-wrenches]

 


Be carefull with this, I found that with the Iso 150 / 24 volt panels that 2
was the max I could go in series. The max panel volts would be in the 155
volt range for 3 panels on our coldest winter nights.
Robin told me to move to Hawaii if I wanted to series 3 panels, not here!

Later,
Bob

RE. Ellison
Supplier of;
Alternative Energy Systems & Supplies
34642 Countryman Road
Theresa, NY. USA
                               13691-2076


-----Original Message-----
From: Darryl Thayer [mailto:daryl_solar at yahoo.com]
Sent: Saturday, September 18, 2004 6:51 PM
To: RE-wrenches at topica.com
Subject: Re: MX60 question [RE-wrenches]




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I am not CF but Iknow the answer.
I would put 4 in series giving 4x 30 volts or 120 volts, this is below the
140 volt limit.

The number of series strings you put in parallel Is limited by the 60 amp
output.  So at 120 Voc and 4x24 Vmp or 96 Vmp the current gain is 4x and the
max input per MX60 is Imp < 15 amps.

I hope this is right and perhaps to be safer you should put only 3 in series
or use the limiter circuit that Bob at Outback has been working on.

thanks
Daryl

--- Marco Mangelsdorf <marco at pvthawaii.com> wrote:
> Master Chris F., Prince of the OutBack,
>
> A design question for you, please.  Say I've got a MX60 with a 24 V 
> battery bank.  The modules I'd be using have a 24 Vmp and 30 Voc.  In 
> terms of optimum power production, does it matter if I wire these 
> modules 2, 3 or up to 4 in series?  For whatever it's worth, this 
> would




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