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Solar for Quarries: Bodean_ Mark West Quarry
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panels7


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BoDean Company - Mark West Quarry


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Location

Santa Rosa, CA

Description

Challenge

This project posed many challenges including design and engineering, solar analysis, and project implementation. Stellar Energy needed to design a racking system that would work a reclaimed hillside with very steep slopes, plan for interconnection into three separate meters, and isolate a solution to keep the modules clean in a working quarry. Solar analysts had to come up with an energy model to maximize the benefits for the quarry on each of the three metersand work on all the varying slopes and orientations. Our project managers had the challenge of building in a very difficult environment during heavy winter rains to ensure that the project would begin operating in Spring of 2011.

Solution
Our solar analysts decided to break up the arrays into three groups with three orientations where each orientation produces power for each coinciding meter. Design and engineering used Terrafix ground screws to attach the racking to the hillside because of the loose soil conditions and the ability with Terrafix to accurately locate the earth screws. Our project managers worked with four specialty sub-contractors during the wet winter months and managed to pull all of the pieces together without any injuries, and exceptional quality. Heliotex provided the automated panel cleaning system that turns on at scheduled intervals when atmospheric conditions are ideal.

Benefits
Having solar power produced onsite has many benefits. This rock quarry is located on the outskirts of PG&E distribution lines and it will save 30% more energy than what is actually produced because the utility doesn't have to distribute this power on their grid. In simple terms, this system could power 160 average sized California homes. The amount of CO2 saved from going into our atmosphere compared to traditional power generation methods is equivalent to taking 153 cars off the road each year.

Download the Case Study (pdf)

Specifications

  • Energy Capacity: 809 kW DC
  • # of Modules: 3,444 Yingli PV modules
  • Type of Mount: Terrafix racking and earth screw foundation
  • Type of Inverter: 5 Satcon inverters
  • Monitoring System: SolarMagic data monitoring with weather station; Heliotex automated panel cleaning system

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