Hi Ray and Dan, Thanks for that, the bank is 48V so that sounds like a very good solution.
Carl Emerson Free Power Co. Land line +64 9 473 4286 Mobile +64 22 630 9689 Email emer...@freepower.co.nz Web www.freepower.co.nz -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters Sent: 5 November 2011 12:37 p.m. To: RE-wrenches Subject: Re: [RE-wrenches] High Voltage MPPT units Midnite Solar has the Classic 250, which can go to at least 250 v array open circuit plus it has an additional emergency voltage head room that is equal to the battery voltage. So if you had a 48 v battery, you could go to 298 vdc Open circuit (in extreme cold for instance) without damage. The Classic controller shuts off above 250 v though, so you don't want to design the system to operate that high, but it does give you some breathing room with the design. Also on the "overkill" issue of a 1 Kw array, it all depends on the battery voltage. At 24 v battery, the Classic 250 can handle a maximum of 1722 watts. Personally I've found controllers seem to last longer when over sized, rather than over loaded. Ray Walters Solarray, Inc. On 11/4/2011 5:22 PM, Carl Emerson wrote: > Hi John, > > Yes I have seen this one thanks. > > I should have mentioned that the array will be about 1 kW so a unit that > size is overkill... > > Carl Emerson > Free Power Co. > Web www.freepower.co.nz > > > -----Original Message----- > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of John > DeBoever > Sent: 5 November 2011 12:13 p.m. > To: 're-wrenches@lists.re-wrenches.org' > Subject: Re: [RE-wrenches] High Voltage MPPT units > > Schneider Electric just launched their MPPT 80-600, which is a 80A , up to > 600 V. > > John > Trojan Battery Company > > ----- Original Message ----- > From: Carl Emerson [mailto:freepo...@freepower.co.nz] > Sent: Friday, November 04, 2011 07:08 PM > To: 'RE-wrenches'<re-wrenches@lists.re-wrenches.org> > Subject: [RE-wrenches] High Voltage MPPT units > > Hi there, > > I have heard that Morningstar are bringing out a high voltage MPPT unit next > year. > > This unit will run up to 600 Volts. > > In the mean time what other units are available that allow for higher than > 150 VDC from the array. > > I want to avoid the expense of using a Sunnyboy at the array and bringing AC > back to the inverter. > > Trying to keep cable costs down. > > Many Thanks, > > Carl Emerson > Freepower > Auckland NZ. > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options& settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules& etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > > This e-mail message and any attachments that accompany it may contain > information that is confidential, privileged, or protected from disclosure. > > It is intended solely for the use of the individual(s) to whom it was > intended > to be addressed. 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