Title: Commercial grid-tie solar Post by: Kluge on May 02, 2015, 10:56:48 PM We're in Mason, OH (45040). Have ~2000m2 usable roof space. We consume at least 138kWh/yr and this is projected to increase at least 5% (probably closer to 15%) YoY for at least five years. Energy independence isn't a priority -- I only mention it because we wouldn't want to be producing too much electricity.
Duke offers net metering with renewables-generated electricity able to be sold back at the base price we'd buy at ($.0289/kWh). On top of the 30% federal rebate, we'd plan on taking advantage of the 10-year $.023/kWh credit as well as a .71% 20- or 25-year loan. We currently have a massive Liebert 600T of unknown capacity (the lead-acids are all at end-of-life and basically considered dead - we don't have the UPS switched to output to our outlets, even) which I'd LOVE to see replaced with Tesla UPS units. That said, with the generous renewables-made purchase price of Duke's, I'm assuming batteries are of little use outside its actual UPS use and for load-shifting (Duke does that time-of-day irritation). Assumptions made from researching some solutions on which I may be wrong (and would love to be corrected on!):
Help appreciated. Details certainly available on request! I'm trying to snag actual electricity consumption data, but it's guesstimated for now (giant office kept quite cool in Summer). Here's a .sam going over a few different potential ways we could do this (there's a $10k cost added for mounting and misc. pieces while the additional $5k in labor is for consultations -- the 142.6kWh scenario assumes we buy a truck-load of UTRF-090s (http://www.zomeworks.com/photovoltaic-tracking-racks/)): https://www.dropbox.com/s/h65eax719s005c7/TG.sam?dl=0 Title: Re: Commercial grid-tie solar Post by: peeveepee on May 03, 2015, 04:47:32 AM What is the per kw price when compare to traditional power?
Title: Re: Commercial grid-tie solar Post by: Kluge on May 03, 2015, 11:48:25 AM What is the per kw price when compare to traditional power? With a 50-year simulation, after incentives and since we'd be "locking in" on inflation (so this is in "May, 2015 dollars") - $.0124/kWh in the first set-up (cheap poly panels), $.0125/kWh in the second set-up (presumably more long-lasting mono-si panels and different inverter setup), $.0201/kWh in the third set-up (expensive mono panels with passive sun-tracking mounts). This also assumes the panels can be resold after fifty years for 20% of their original value, which I'm unsure of, and assumes nothing breaks (which I'd price in if I thought I could do reasonably).The biggest difference compared to how this'd be set up in a residential setting would probably be the loan rate, but some states may have very generous rates for solar projects. Title: Re: Commercial grid-tie solar Post by: Kluge on May 04, 2015, 01:18:24 AM Bump
Title: Re: Commercial grid-tie solar Post by: Kluge on May 05, 2015, 11:53:14 AM Somebody help me before I propose something stupid!
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