As I recall, the angle of the modules affects the maximum current you can get, but Voc zooms right up to max with any significant amount of light from any angle.
From: Jesse DuPont Sent: Wednesday, November 28, 2018 8:53 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Solar Array Voc Whem I'm using an MPPT, I generally wire the array for 48V nominal. The Max I've measured is 87.6 volts (4x12V panel in series). Another site where I've got 2x24V panels in series, the max I've measured is 79.98v, although in the latter example, the panels are not angled optimally. Jesse DuPont Network Architect email: [email protected] Celerity Networks LLC Celerity Broadband LLC Like us! facebook.com/celeritynetworksllc Like us! facebook.com/celeritybroadband On 11/27/18 10:28 PM, Forrest Christian (List Account) wrote: Let me see if I can re-phrase my question: I'm redesigning a voltage input circuit for one of the sitemonitor products - this is for voltage metering, not for powering the device. One of the common questions I get asked is 'can I monitor my solar array voltage'. Currently the answer is usually 'probably not, unless you are certain the Voc is below 60V, and that one side of the array is already grounded to common (often isn't for mppt controllers)'. I'd rather be able to say something like 'sure, as long as the Voc isn't over X volts', where X is high enough that it contains a reasonable subset of the arrays out there. I don't think supporting 150V arrays is in the cards (and yes, I know the tristar MMPT goes up to 150V), since that starts getting in the range where clearances get hard to do on the circuit board. So I guess the question should be: What voltage would be able to measure most of the array voltages out there? On Tue, Nov 27, 2018 at 7:07 PM Robert <[email protected]> wrote: Morningstar makes one of the better charge controllers and the one that I like has ethernet access built in. It takes up to 150 V from the arrays. They also have their new Mega Controller that will do up to 600 Volts I don't know of any WISPs that are using it. We have sites that we have 2x Morningstars feeding our battery sets... Robert On 11/27/18 5:07 PM, Forrest Christian (List Account) wrote: > Looking at determining the maximum reasonable voltage range for a new > product I'm working on. > > I'm wanting to include a reasonable input for measuring solar panel > voltage (a common request). For those who are running solar arrays to > charge a DC site (not grid-connected), I'm wondering what type of array > voltages you're running. I'd prefer the Voc figure since that is worst > case, but even the nameplate voltage (i.e. multiples of 12V) would be > useful since I can kinda infer the Voc from that. > > I suspect some of you are running rather high voltages (>100Voc) on your > arrays, not sure If I'm going to be able to measure that high, but would > like to get a feel for what the reality is. > > -- > *Forrest Christian* /CEO//, PacketFlux Technologies, Inc./ > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > [email protected] <mailto:[email protected]> | > http://www.packetflux.com <http://www.packetflux.com/> > <http://www.linkedin.com/in/fwchristian> > <http://facebook.com/packetflux> <http://twitter.com/@packetflux> > > > > -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- Forrest Christian CEO, PacketFlux Technologies, Inc. Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 [email protected] | http://www.packetflux.com -------------------------------------------------------------------------------- -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
