Sterling Power APD24 – 24V Alternator Protection Device

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The Sterling Power APD24 protects your 24V alternator from the damaging voltage spikes (load dump) that occur when a battery or a battery-to-battery charger is suddenly disconnecte d while the alternator is under load. It clamps those transients before they can reach your alternator's diodes and regulator — cheap insurance for an expensive component in any 24V dual-battery or DC-DC install. Specifications Type Alternator protection device (transient / load-dump suppression) Nominal voltage 24V Function Clamps voltage spikes caused by sudden battery or charger disconnection Typical use 24V dual-battery, DC-DC, and battery-to-battery charging systems Dimensions & clamp rating 90 × 90 × 60mm (clamp rating available on the datasheet — contact us to confirm) Weight 0.25kg Warranty 2-year return-to-factory Key Features Carries no main current itself — only light-gauge wiring is needed to install Works with any alternator or battery-splitting device suitable for 12V or 24V systems Protects against exactly the failure modes that destroy alternators most often — a cable coming loose, a fuse blowing, or the engine being electrically switched off while running Why It Matters Alternators hate having their load pulled away suddenly. If a battery isolator opens or a charger drops offline mid-charge, the resulting spike can destroy diodes and regulators. The APD24 gives that energy somewhere safe to go, protecting the alternator across the life of your build. Show more