Why havent you installed a solar array yet? Or: Why and How to Add - - PowerPoint PPT Presentation

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Why havent you installed a solar array yet? Or: Why and How to Add - - PowerPoint PPT Presentation

Sep 18, 2022 209 likes •400 views

Why havent you installed a solar array yet? Or: Why and How to Add Solar Power to Your Own House Ruth Douglas Miller Kansas State University AND Morgantown, PA ASA 2017 Installation Cost of PV in US Tracking the Sun IX, G Barbose

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Why haven’t you installed a solar array yet?

Or: Why and How to Add Solar Power to Your Own House

Ruth Douglas Miller Kansas State University AND Morgantown, PA ASA 2017

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Installation Cost of PV in US

“Tracking the Sun IX”, G Barbose & N. Dargouth, LBNL, August 2016: trackingthesun.lbl.gov

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Noodle Ducey 6-kW Array

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Noodle Ducey 6-kW Array

Hardware cost: $8,918 = $1.48/W Panels, inverter, DC wiring, rack mounts Installation cost: $6,118 = 41% (high) Total $2.50/W installed, before tax credit Electricity costs $0.14/kWh Fixed costs: $15/mo. Simple payback: 7000kWh/yr * $0.14/kWh = $980/yr, 15 year payback (w/o tax credit).

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Other Considerations

Ground-mount costs more Do-it-yourself costs less Some economy of scale exists Rent-to-own is possible Lease-my-roof is possible Regional incentives/disincentives matter Federal 30% tax credit expires Dec 2021

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Where to Start?

PVWatts: http://pvwatts.nrel.gov/ Google Sunroof: https://www.google.com/ get/sunroof#p=0 Find your property and determine how large an array will fit… OR: Find your electric bill and determine how large an array you need.

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Google Sunroof Output

Ok start, but many sites missing, and details are scant. Is this a good site? No advice offered here.

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PVWatts Input Screen 1

Good estimate of array size. Detailed estimate of per-month expected

  • utput.
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PVWatts Input Screen 2

Enter parameters as you know them.

  • Tilt: 5:12 =22°
  • Azimuth: degrees

East of North

  • Avg Cost of Elec:

EIA for region, or your specific bill data.

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PV Watts Output Screen

Uses actual solar data from as nearby as possible, and cost of electricity from either EIA or your entry.

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Check Incentives Available:
 dsireusa.org

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Check with your Utility…

Know what the law gives you! Play nice if possible.

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Time to Go Shopping!
 Wholesale Solar…

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Blue Pacific Solar
 bluepacificsolar.com

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GoGreenSolar…

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Find an Installer…

OR just search for “solar installers in my area.” Most roofing companies will do PV.

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FAQ

  • What about hail?
  • PV is guaranteed against golf-ball-sized hail
  • How long do they last?
  • Guaranteed 20 years, but 30+ years is common, <15% loss
  • What about snow?
  • Sun shines through snow; panels are warm
  • They are ugly.
  • So are dollar bills.
  • My Homeowner Assn doesn’t like them
  • Don’t they like money?
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More FAQs

  • My roof is bad and I have no room?
  • See if your utility offers shares in an array, or

see Arcadia Power: https:// www.arcadiapower.com/

  • I just can’t afford the up-front cost
  • Look for a “lease my roof” option.