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Replacement of the Point Mackenzie Substation Battery

Scott Girard

In the early 1990's Chugach Electric (Chugach) fell prey to the allure of valve regulated lead-acid (VRLA) batteries. Widespread application of this battery technology has resulted in additional costs and lessons learned. Application of a VRLA battery at the Point MacKenzie Substation, a remote site, has resulted in high costs over the years and forced development of an effective solution. This paper presents a history of events and decisions made in selecting a replacement battery for the Point MacKenzie Substation.

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