Havis ChargeGuard Select CG.X 12V Programmable Timer Switch, Alternator/Voltage Sensing & Battery Protection

The Havis ChargeGuard Select CG.X is a programmable 12V vehicle timer switch that automatically powers mobile electronics on engine start and prevents battery drain by shutting them off after a selectable delay.

The ChargeGuard Select is a compact, self-contained power-management module engineered for vehicles using two-way radios, mobile data terminals, laptops and other mobile computing devices. It senses ignition or alternator activity and switches accessory power accordingly, with multiple sensing modes and a configurable timeout so equipment remains available while preventing unwanted battery discharge.

How does the ChargeGuard Select detect when to turn equipment on?

The unit offers several sensing modes so it can adapt to different vehicle electrical systems. It can automatically detect alternator activity, monitor voltage rise, or respond directly to ignition input, providing flexibility for varied installations.

• Automatic alternator detection mode for standard installations
• Voltage rise (DC) sensing when alternator signature is used
• Direct ignition (HL) input for wired ignition switching
• Isolated alternator detection option to avoid false triggers from shared circuits

What timeout and protection features does it include?

The ChargeGuard Select uses a programmable timer to keep devices powered for a chosen interval after the engine is switched off. It ships with a two-hour default delay, but installers can set anything from five seconds up to indefinitely to match operational needs.

• Selectable delay from 5 seconds to infinite standby
• Pre-programmed two-hour default for typical use
• Built-in LED indicators for under- and over-voltage conditions
• Provides circuit protection to guard against voltage anomalies

How is the ChargeGuard Select installed and powered?

Designed for straightforward wiring, the module connects directly to a vehicle battery or ignition circuit. Its compact form allows flexible mounting locations, and the self-contained design reduces the need for external protection components.

• Hardwired to battery or ignition switch for reliable power sensing
• Compact enclosure fits in tight dash or equipment bays
• No external relay required for most setups—self-contained circuit protection
• LED feedback simplifies troubleshooting during installation

What operational benefits can fleets and technicians expect?

By managing accessory power automatically, the ChargeGuard Select helps reduce dead battery incidents and lowers maintenance related to premature battery replacement. It also keeps mission-critical equipment available during short stops and powers down devices to prevent overnight drain.

• Mitigates accidental battery depletion from unattended accessories
• Extends uptime for mobile radios and computing devices
• Lowers service costs tied to battery failures and equipment downtime
• Clear LED warnings help identify electrical issues early

Who is this for: The Havis ChargeGuard Select is suited for fleet managers, first responders, telecom technicians and anyone who installs or operates mobile electronics in vehicles. It’s ideal when you need reliable automatic power control, flexible sensing options, and a programmable timeout to balance equipment availability with battery preservation.