Re: [RE-wrenches] Solarex module match question

, April 28, 2010 12:20 PM To: RE-wrenches Subject: [RE-wrenches] Solarex module match question Calling the old-timer off-grid 12V graybeard Wrenches... I am reposting this to the list in hopes of shakin' up a response, as nobody tried to answer my request for help. In short: in theory, if you

Re: [RE-wrenches] Solarex module match question

-wrenches Subject: [RE-wrenches] Solarex module match question Calling the old-timer off-grid 12V graybeard Wrenches... I am reposting this to the list in hopes of shakin' up a response, as nobody tried to answer my request for help. In short: in theory, if you force an array to operate at a voltage

Re: [RE-wrenches] Solarex module match question

...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Wednesday, April 28, 2010 3:20 PM To: RE-wrenches Subject: [RE-wrenches] Solarex module match question Calling the old-timer off-grid 12V graybeard Wrenches... I am reposting this to the list in hopes of shakin' up a response, as nobody

Re: [RE-wrenches] Solarex module match question

HI Allan I would strongly encourage separate MPPT controllers for the different module types. Even if you get an acceptable voltage match under some conditions, it will never be optimal for all conditions. I'd even consider using the venerable C40 with the old modules, as they have less to

Re: [RE-wrenches] Solarex module match question

UNLESS you are moving that power any distance. I have a 20+ year old rack of 12, Solarex MSX-60's traveling 200' to the FM60. Wired in two strings of 6, allowed me to drop the wire size considerably! Todd On Thursday, April 29, 2010 1:44pm, R Ray Walters r...@solarray.com said: HI Allan I

[RE-wrenches] Solarex module match question

Out of curiosity, we have a client with a mix and match set of older PV modules. I did not document any of this but: Of course they did not want to spend more $ with at the addition of 4 new modules, so we tried out 4 new and 4 older PV on [1] MX 60. Result - voltage was slightly higher than

[RE-wrenches] Solarex module match question

Calling the old-timer off-grid 12V graybeard Wrenches... I am reposting this to the list in hopes of shakin' up a response, as nobody tried to answer my request for help. In short: in theory, if you force an array to operate at a voltage above its MPP, current drops off significantly on the

Re: [RE-wrenches] Solarex module match question

If the existing Solarex 77 modules are rewired six per series string, that's six modules X 36 cells = 216 cells per string. I suggest that you match that, with the new array strings also having 216 cells per string. Polycrystal might have a better chance of not exceeding the Solarex VmP by as

Re: [RE-wrenches] Solarex module match question

On Apr 28, 2010, at 12:20:05 PM, Allan Sindelar al...@positiveenergysolar.com wrote: Calling the old-timer off-grid 12V graybeard Wrenches... Allan, I don't have the answer but imagine a lot depends on how much the aged panels have dropped in output. In theory matching strings is important but

Re: [RE-wrenches] Solarex module match question

that is an option for you. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Wednesday, April 28, 2010 12:20 PM To: RE-wrenches Subject: [RE-wrenches] Solarex module match question Calling the old-timer off-grid

[RE-wrenches] Solarex module match question

Wrenches, We have an off-grid customer with a system that has been growing since 1996; we have cared for it intermittently since 2000. The customer has two tracked arrays currently. One has ten Astropower AP120s for 1200 nominal watts, but that's not the topic today; it'll come up in 5 years