There are many reasons you might want to limit AC output. Say 120%buss bar rule or some other rebate situation where its sized on AC, not DC size. So you can maximize your daily production without going over the peak AC limit.
Jay peltz power On Jan 27, 2013, at 8:05 PM, William Miller wrote: > Jesse: > > Do you have any way to compare the total harvest for the day for a given > module in a "clipping" scenario versus an unclipping? The question I want to > answer is: Do we improve production enough on the shoulders of the clip to > justify the loss on the peak? > > Thanks, > > William Miller > > > At 06:25 PM 1/27/2013, you wrote: >> A while back (3 years)I installed a system (bid spec) for a school that used >> 215W RECs and D380s on a dual axis tracker. With the ability to monitor the >> array, I see constant clipping. The modules will usually produce 199Ws >> regularly. A few days ago we had temps of -34F and clear skies. My array >> at home had one of its best days this winter. I have Tigos on so I can >> monitor watts, current, temp and voltage. I was seeing anywhere from 215W to >> 223W from my modules between 11:30am and 1pm. The modules on the tracker >> were still producing 199W. I didn't get an irradiance reading that day but >> my Tigos showed above IMP readings and way above VMP reading that day. >> >> I've only been doing this for 6 years, so I don't have the experience that >> some people on this list have, but it seems foolish to me to waste that >> production. It's kinda site specific, but where I live the cold temps and >> snow reflection seem like something we should be utilizing. > > _ _______________________________________________ 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
