Friday, May 20, 2011

Durable Non-Metallic Enclosures Resist UV Damage In Solar Control Applications

Durable Non-Metallic Enclosures
Resist UV Damage In Solar Control Applications

Mark Hughes
Energy Systems Sales Director
Amptech Energy Systems

Amptech Energy Systems is an alternative energy “Balance Of Systems” (BOS) supply specialist. We have designed our Solar PV Combiners collaboratively with direction from solar PV BOS installers, integrators, electricians, design engineers, marketers, manufacturers and educators. The result is the most user-friendly combiner box in the Solar PV industry. We also provide a monitoring service to measure and diagnose the performance of combiner. All of our products are manufactured in the United States and meet the UL standard of quality, safety, and reliability.

The Challenge: Housing and Protecting Extremely Sensitive Circuitry

Our combiner is designed to combine the output of multiple solar electric (PV) source circuits. Each circuit can accept up to 12 amps of PV input current up to a total maximum of 340 amps. It also provides a convenient, visual way to isolate the PV array input circuits. No interruption of the power production of other circuits in the array is required. This reduces the time required to troubleshoot any PV related circuitry problems and improves safety. The combiner also has an optional string level wireless monitoring capability as part of the “drop in” design to each combiner.

All of the source circuitry and supporting components must be housed in an enclosure that has a proven ability to protect from impact, moisture, dust, corrosion, temperature variations and damage from UV rays.
The Solution: Non-Metallic Enclosures

Because our combiner box is designed for installation near the PV array, it is exposed to extreme environmental conditions including a wide range of temperature fluxuations, rain, snow and potentially damaging impact from the sun. Under such environmental extremes the need for optimum enclosure protection is obviously paramount.

After evaluating a wide range of metallic and non-metallic enclosur we selected a non-metallic enclosures. Why? First: the quality of non-metallic manufacturing process continues to improve and some manufactures now have their own in-house material formulation capabilities assured us of consistency in product quality. Second: field testing demonstrated that fiberglass enclosures provide proven durability within the demanding environments in which we place our controls. We also found that some now carry a UL 94-5V flammability rating and are molded from sheet molded compound formulation that provides superior molded-in UV resistance. This combination enables Stahlin, us to offer a ten-year warranty against manufacturer’s defects --- the longest such assurance in the industry.

For more information on non-metallic enclosures visit: Stahlin's at:

Amptech Energy Systems contact: Mark Hughes- Dir Email: 201 Glocheski Drive. Manistee,MI 49660 Phone: 231-4646-5492.

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