Perko Battery Switches - Manual

Perko Manual Battery Switches: Marine-Grade Power Control

When it comes to managing electrical power on the water, few components are more critical — or more trusted — than a manual battery switch. Perko, a Miami-based marine hardware institution with a legacy stretching back over a century, has long been the go-to name for battery switches aboard recreational and commercial vessels alike. Their lineup of manual battery switches covers everything from simple on/off disconnect switches to full-featured selector switches for complex multi-battery, multi-engine setups.

A Range Built for Every Boat

Perko organizes its manual battery switch line into clearly differentiated series, each engineered for a specific use case. The flagship 8501 Series of medium-duty battery selector switches is, by Perko's own description, among the most popular battery switches ever produced. The 8501 Series battery selector switches are recognized for their use of the traditional Perko bolt circle for easy installation — whether new or as a direct replacement — and are rated at up to 380 amps continuous and 850 amps intermittent. For straight on/off disconnect duties, the 9601 Series medium-duty disconnect switches follow the same proven bolt-circle pattern and are rated at 250 amps continuous and 360 amps intermittent.

For installations where space is at a premium, the compact 8511 and 8512 Series battery selector switches use the same traditional Perko bolt pattern as the 8501 series but with a smaller footprint, making for easy installation. On the heavy-duty end, the 8603 Series is among the most popular heavy-duty battery switches ever produced, again leveraging the traditional Perko bolt circle for easy installation whether new or as a replacement, and can be mounted in numerous locations as an ignition-protected switch in gasoline-powered engine rooms.

For smaller vessels, Perko's innovative 8521 Dual Battery Selector Switch offers a fresh approach. It allows the addition of an extra battery for accessories, provides flexibility of selection between batteries or combined parallel operation for starting or charging, can serve as an emergency main disconnect, and all models feature a make-before-break design and are ignition protected. The 8521 also supports three mounting options — panel mount, bulkhead mount, and cup mount — giving boaters maximum installation flexibility.

Key Features That Set Perko Apart

• Made in the USA: Like all Perko products, these time-proven switches are made in the USA.
• UL Listed & Ignition Protected: All Perko battery disconnect switches and battery selector switches are UL listed, ignition protected, and CE approved — a critical requirement for gasoline-powered vessels.
• Make-Before-Break Design: Selector switches are designed with a "make before break" feature, allowing switching between the “1”, “ALL”, and “2” positions while the engine is running.
• Alternator Field Disconnect: Models with an "Alternator Field Disconnect" feature offer protection for non-unitized alternators should the switch accidentally be turned to the OFF position with the engine running.
• High-Conductivity Studs: High-conductivity studs are long enough to handle more than one cable and strong enough for the torque needed for secure connections.
• Optional Key Lock: An optional key lock helps to prevent unauthorized use of the vessel.
• 5-Year Consumer Warranty: Perko warrants its consumer products to be free from defective materials or workmanship for a period of five years from the original purchase date.

Disconnect vs. Selector: Choosing the Right Switch

Battery disconnect switches help manage the overall use of electrical power on board — they connect or disconnect electrical devices from the electrical system, prevent battery drain during periods of inactivity, and allow for a quick and easy way to shut down the entire electrical system in an emergency. Battery selector switches go further: they permit battery selection of two or more batteries for specific purposes including starting engines, running accessories, or recharging, and facilitate putting batteries in parallel for emergency starting when one or both batteries are substantially discharged.

Whether you're outfitting a small skiff or a twin-engine offshore cruiser, Perko's manual battery switch lineup delivers the reliability, safety certifications, and installation versatility that serious boaters demand.