Vexilar SP300 SonarPhone T-Box Portable Installation Pack

The Vexilar SP300 SonarPhone T-Box Portable Installation Pack is a self-contained 12V battery solution purpose-built for anglers who need mobile sonar capability without permanent boat installation. This portable pack delivers continuous power to your SonarPhone unit, enabling you to deploy advanced fish-finding sonar technology on any vessel regardless of existing electrical infrastructure.

The SP300 system ships complete with a rugged carry case housing the battery pack, integrated transducer cable, skimmer-style transom-mounted transducer, and suction cup bracket rated for safe operation up to 15 mph. This design eliminates drilling, through-hull modifications, or permanent mounting hardware—critical for rental boats, shared vessels, or operators who rotate between multiple watercraft. The included safety cord provides redundant transducer retention, meeting standard recreational boating safety requirements. The system's compact footprint (9 x 6 x 12 inches, 7.2 lbs) makes it portable enough for kayak fishing, small center console deployment, or shore-based operations where conventional hardwired sonar systems are impractical.

This package addresses a specific gap in the market: anglers seeking Vexilar's established sonar accuracy and durability without the cost and permanence of full marine electrical integration. The T-Box approach preserves vessel resale value while maintaining full access to SonarPhone functionality for fish location, structure mapping, and real-time water column analysis. Battery runtime on a single charge depends on sonar operational mode and ambient conditions, but the system is sized for extended day-use applications typical of recreational fishing scenarios.