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Arch Electric completes large rooftop solar install for Wisconsin wood product manufacturer

By Kelsey Misbrener | December 16, 2021

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Arch Electric recently completed a 389-kW SolarEdge DC-optimized PV system at the Ongna Wood Products production facility in Sheboygan Falls, Wisconsin. The rooftop array is comprised of 1,037 solar modules, each paired with SolarEdge Power Optimizers for maximum energy production at the site — despite challenging cold-weather conditions typical to Wisconsin.

Ongna Wood Products is a fourth-generation family company that manufactures wooden pallets, crates and boxes. The company had invested in a new pallet-making machine that, while increasing its productivity, would also significantly increase its power consumption. Solar power was an interesting option, but with Wisconsin’s long winters, overcast skies and temperatures ranging from 100°F to -25°F, the company was not sure that solar could be a viable option. Fortunately, local installer Arch Electric was less than ten miles away in Plymouth and had extensive experience in solar generation in Wisconsin.

“The fact that SolarEdge is an established, leading supplier in the solar industry with a proven track record gave Ongna Wood a lot of confidence,” says J. D. Smith, business development coordinator for Arch Electric. “At the same time, Arch Electric has been around for 20 years, and has built its business on developing solar solutions specifically for the Wisconsin climate. The combination of the two companies’ expertise and experience reduced the risk factor for Ongna Wood and gave them confidence to invest in solar.”

As a company focused entirely on meeting the needs of its Wisconsin-based customers, Arch Electric designs all its projects to maximize solar energy production throughout the year. For the Ongna Wood install, it decided to mount the solar modules on bespoke racking that changes the mounting angle from the industry standard of 10° to 22°. This shift compensates for the lower sun angles and makes it easier for snow to slide off the modules without intervention, enabling greater power production.

This dedication also led to Arch Electric’s decision to specify SolarEdge’s Power Optimizer solution for all its installations. SolarEdge’s Power Optimizers attach directly to solar modules and enable independent operation, meaning the underperformance of one module, for example due to snow or cloud coverage, will not impact the others on the same string. This will ensure Ongna Wood Products will benefit from greater year-round energy production.

As a company working with wood and heat, safety was also a crucial consideration for Ongna Wood.

“The company liked that the SolarEdge Power Optimizers give it the ability to monitor each solar module for performance and faults, which helps minimize risk and maximize lifetime efficiency, and that, with SolarEdge’s SafeDC feature, there is a simple way to shut down power to the array to enable safe roof repairs, access by firefighters, and general maintenance to deal with snow and ice,” Smith said.

All of these advantages gave Ongna Wood Products the confidence to make the investment in solar power. The SolarEdge system is expected to produce over 80% of the site’s energy needs, and is forecast to achieve a return on its investment in just 4.4 years.

“Ultimately, it’s the financial evidence that sells solar systems to companies like Ongna Wood Products,” Smith said. “Sustainability is a bonus, but SolarEdge’s technology with Arch Electric’s local expertise makes solar energy a viable business proposition — even in Wisconsin.”

News item from SolarEdge

About The Author

Kelsey Misbrener

Kelsey is managing editor of Solar Power World and host of the Contractor's Corner podcast.

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