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Perko 8521DPC Compact Dual Battery Selector Switch with Cup Mount

Manufacturer

Perko

<h3>A Century of American Marine Manufacturing Excellence</h3> <p>Since 1907, Perko has stood as one of America's most trusted names in marine hardware and accessories. What began in Brooklyn, New York, as a small operation crafting handmade sheet metal lanterns has evolved into a fifth-generation, family-owned manufacturer producing over 1,000 distinct marine products. Now headquartered in North Miami, Florida, Perko maintains an unwavering commitment to American craftsmanship—virtually every component, from bronze castings to chrome-plated fittings, is designed, engineered, and manufactured in-house at their expansive facility.</p> <p>Perko's reputation rests on precision manufacturing and uncompromising quality standards. The company operates its own automated foundry pouring aluminum, bronze, and stainless steel, performs decorative chrome plating and electrical contact gold plating in-house, and utilizes computerized CNC machining alongside robotic grinding. This level of vertical integration ensures consistent quality control and allows Perko to maintain ISO 9001:2015 certification while adhering to U.S. Coast Guard, UL, and National Marine Manufacturers Association standards.</p> <h3>Navigation Lighting for Every Vessel</h3> <p>For over a century, Perko has been the go-to source for marine navigation lights that meet the most stringent safety requirements. The company's <a href="/7492-perko-mastheadall-around-lights-with-removable-telescoping-bases-200666">masthead and all-around lights with removable and telescoping bases</a> represent decades of engineering refinement, offering boaters flexible mounting solutions for vessels under and over 20 meters. These combination lights integrate U.S. Coast Guard-certified masthead and all-around functionality in single, space-saving housings with fold-down adjustable angles and durable polymer construction. Perko has recently updated many navigation light models to meet ABYC C-5 LED standards, incorporating energy-efficient LED technology while maintaining the precise beam angles and visibility distances required by maritime regulations.</p> <h3>Premium Fishing Equipment Built for Serious Anglers</h3> <p>Understanding that anglers demand durability and versatility from their deck hardware, Perko manufactures an extensive line of <a href="/7492-perko-flush-mount-rod-holders-200429">flush mount rod holders</a> designed to withstand harsh marine environments. Available in both vertical and 65-degree angled configurations, these rod holders feature chrome-plated bronze or zinc alloy flanges paired with stainless steel or anodized aluminum tubes. The soft black liners protect expensive rods and reels, while integral flip-up caps and gaskets keep saltwater out when holders aren't in use. Perko's proprietary Marinium alloy—an exceptionally high-strength, corrosion-resistant material—is available on select models for the ultimate in longevity.</p> <h3>Complete Marine Systems and Hardware Solutions</h3> <p>Beyond lighting and fishing equipment, Perko's catalog spans virtually every marine hardware category. Their battery switches and electrical components are renowned for reliability in demanding saltwater applications. The company's underwater hardware—including bronze seacocks, thru-hulls, and intake strainers—is engineered to perform flawlessly below the waterline. Perko also manufactures fuel system components including EPA-compliant carbon canisters and specialized valves to help builders meet modern diurnal emissions regulations. Deck hardware such as cleats, chocks, locks, latches, and ventilators round out a product line that has served recreational boaters, commercial vessel operators, and military applications for generations.</p> <p>Every Perko product carries the company's time-tested motto: "We Make it Right, Right Here!" This commitment to domestic manufacturing and superior engineering has made Perko an essential brand for anyone who demands the best for their vessel.</p>

Part Number

8521DPC
06/01/2036 6:58 AM
Sale Price

$86.07

2 left at this price

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Usually delivered within 2 days

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Product Details

The Perko 8521DPC Compact Dual Battery Selector Switch features a unique cup-mount (recessed mount) design that encloses the switch behind a durable, easy-open cover, protecting the switch face from the elements while maintaining a clean, professional appearance. This switch requires a 4-inch installation hole and is ideal for marine, RV, and automotive applications where space is limited.

Key Features:

  • Four position selector: Battery 1, Battery 2, Both batteries combined, or Off
  • Make-before-break design prevents power interruption when switching between batteries
  • Ignition protected for safe operation in marine environments
  • Removable key provides additional security to prevent unauthorized use
  • Emergency disconnect capability for electrical system protection
  • Allows parallel operation of both batteries for starting or charging
  • Recessed mounting design protects switch from accidental contact and weather exposure

This dual battery switch provides complete control over your electrical system, allowing you to alternate between batteries to ensure you always have starting power available. The parallel "Both" position combines both batteries for additional cranking power or to charge a depleted battery from your alternator.

Products specifications

Amperage

140 Amps Continuous

Dimensions

Cup Diameter: 4-1/2"

Type

On Off Switches

Voltage

6-50V DC

Cold Cranking Amps

200 Amps/5 Mins-250 Amps 30 SecStart

ISO Approved

9001:2015

Warranty Details

Five Years With Proof of Purchase

Great !! So Happy! WOW YEAH !!!!!!

quick and easy. thank you.

Super happy

So far so easy

Easy to find parts.

Nice so far. If I get part in good timing I will use y'all again. Thank you!

Great prices, quick ship thanks!

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