whats the average size/watt for panels now? what percentage of solar energy is converted to power, how much is "lost? if you has a mirror set up to split the light off into two panels, what would the aggregate generation be? (say a 10x10 horizontal surface mirrored to redirect the light equally to two 10x10 vertical surfaces)
On Sun, Sep 9, 2018 at 1:00 PM Bill Prince <[email protected]> wrote: > Yeah. With a 1KV inverter, you can make a pretty substantial string, and > get away with fairly small gauge wire all the way up to the inverter. > Older inverters (and electric codes) only allowed up to 600 volts for > the DC part of the system. So there is now a sweet spot for systems that > run between 600 volts and 1000 volts. You avoid the cost of an > additional inverter if your entire system can run under 1000 volts, but > over 600 volts. You might be able to get over 20 panels on a single string. > > > bp > <part15sbs{at}gmail{dot}com> > > On 9/9/2018 9:29 AM, Chuck McCown wrote: > > Try to set the angle to the same as the latitude. So roughly 40 > > degrees of tilt angle. > > > > Rather than a 3x3 array, figure out the area. > > You get roughly 11 watts per square foot for amorphous panels. > > > > Then take that wattage and try to find panels that will both fill the > > area but also add up to your max inverter input voltage. > > > > Many grid tie units are string inverters designed for series strings > > that will go up to 1000 volts now. > > So overvoltage will probably not be an issue. > > > > -----Original Message----- From: Sterling Jacobson > > Sent: Saturday, September 08, 2018 10:59 PM > > To: AnimalFarm Microwave Users Group > > Subject: Re: [AFMUG] OT Solar and battery backup > > > > Okay, forget oversize I guess. > > > > I like the idea of non-roof mount. > > > > What if I made a pergola type deck cover, but sort of mounted an array > > of 3 x 3 panels tilted southward on top? > > > > > > > > -----Original Message----- > > From: AF <[email protected]> On Behalf Of Chuck McCown > > Sent: Saturday, September 8, 2018 7:58 PM > > To: [email protected] > > Subject: Re: [AFMUG] OT Solar and battery backup > > > > The only reason to oversize an array here in Utah if fed by Rocky > > Mountain Power is if you made an effort to run electrical heating > > loads in the winter to offset some natural gas usage. Nice to run the > > AC as much as you want in the summer too. > > > > I have wonder if I put a small inverter to back feed my home and > > disconnect the mains during an outage, if the inverter would spoof the > > grid tie inverters into coming on. I am pretty sure they would if the > > inverter put out a good clean sine wave. But if the inverters got > > satisfied that there was mains power and they kicked on, they would > > overvoltage things pretty quickly, so I would have to have some kind > > of load that would ballast the grid tie inverter a bit. Be fun to > > experiment with. > > > > -----Original Message----- > > From: Robert Andrews > > Sent: Saturday, September 08, 2018 7:45 PM > > To: [email protected] > > Subject: Re: [AFMUG] OT Solar and battery backup > > > > & while they are selling your solar to your neighbor they don't lose > > the 20-28% line lossage from the power plant that becomes additional > > profit for them! They bill the neighbor like the loss is still there > > and give you credit for your solar like the loss is going to happen. > > > > > > > > On 09/08/2018 03:55 PM, Chuck McCown wrote: > >> I choose to mount on the ground rather than the roof. If you have the > >> room you can get optimal placement and tilt angle. > >> Grid tie inverters are the way to go. One large one is much more cost > >> effective than the microinverters when calculated dollars per watt. > >> You can get inverters for about 15 cents per watt. > >> Mounting (that I designed out of unistrut) is about 15 cents per watt. > >> Panels can be had for 50 cents per watt. > >> 10 kW is a pretty good size for most homes. > >> If you oversize it, Rocky Mountain Power will erase all your carryover > >> credit each spring thus selling your net production to your neighbors at > >> retail rate while not giving you any credit for it. So the target > >> is the > >> $8.48 monthly bill (the minimum in Utah when on RMP) and no extra > >> power in your credit account each March. > >> Screw batts. Batts will double the cost of the system. > >> Nice generator with an automatic transfer switch and a propane tank ( > >> if you are a prepper) or natural gas if you are not worried about it. > >> *From:* Sterling Jacobson > >> *Sent:* Saturday, September 08, 2018 1:10 PM > >> *To:* AnimalFarm Microwave Users Group > >> *Subject:* [AFMUG] OT Solar and battery backup > >> > >> What’s the current good method for adding a 10 panel system with > >> battery backup for 100A home system? > >> > >> Seems like several solar panel kit options that use microinverters > >> tied to a main system which ties to the main breaker. > >> > >> But not sure how to integrate battery system into that. > >> > >> Seems like the current solar guys all want to just install the solar > >> system and send extra to the grid or offset, not backup battery. > >> > >> And on top of that, what if I want a standard Generac 11kw generator > >> integrated into the mix? > >> > >> ---------------------------------------------------------------------- > >> -- > >> -- > >> 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 > > > > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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