Imagine powering your critical electronics without ever worrying about a single point of failure. The Newmar APS-70 steps in as your reliable guardian, effortlessly choosing the strongest DC power source from two inputs to keep your systems running smoothly. Whether you're out on the water, hitting the open road in an RV, or managing industrial equipment, this solid-state powerhouse delivers uninterrupted performance by prioritizing the higher voltage source and switching seamlessly if one drops out.

Why Seamless Redundancy Matters for Your Setup

In demanding environments like marine vessels, emergency vehicles, or off-grid solar arrays, power glitches aren't just inconveniences—they can spell disaster. The APS-70 eliminates transfer delays, ensuring your radios, navigation gear, or control systems stay online. Its smart design monitors both sources continuously, routing the best available power to a single output while flagging alarms if a source weakens. No more manual intervention or clunky relays that wear out over time.

Key Features That Set APS-70 Apart

• Zero Transfer Time: Switches instantly to the backup source, keeping loads powered without interruption.
• Rugged Build: Anodized aluminum housing resists corrosion and handles harsh conditions, from salty sea air to dusty job sites.
• Simple Wiring: Connect two DC inputs to the studs, output to your load, and optional alarm wires for monitoring—installation done in minutes.
• Versatile Voltage Range: Handles 6-50 VDC systems with negative ground, perfect for 12V, 24V, or 48V applications.
• Compact and Lightweight: Fits tight spaces at just 3.25 x 4.5 x 3.1 inches and 2 pounds.

Real-World Applications

Boat owners love it for dual battery banks, ensuring VHF radios and fish finders never go dark. RVers pair it with alternator and solar inputs for reliable house loads. In security systems or remote telecom towers, it provides foolproof backup, outperforming traditional diode isolators by minimizing voltage drop and heat buildup. Industrial pros use it for PLCs and sensors where downtime costs real money.

Effortless Installation Tips

Mount it securely in a dry, ventilated spot. Use 6mm stud terminals for clean connections—crimp ring terminals to match your wire gauge (up to 70A continuous). Ground the negative properly, and attach alarm leads if you want remote alerts via relays or buzzers. Test by disconnecting one source; you'll see the output hold steady without a blink. Pro tip: Fuse both inputs individually to protect against shorts.

Technical Specifications at a Glance

Boost Reliability and Slash Maintenance

Unlike mechanical switches prone to arcing or diode setups that waste power as heat, the APS-70's solid-state tech means longer life and efficiency. Users report years of flawless operation in vibration-heavy setups. It's not just a switch—it's peace of mind engineered for the long haul.