Battery Tender 021-1173 17W Solar Panel Battery Charger with Controller

The Battery Tender 021-1173 is a 17-watt solar battery charger designed to maintain and charge 12-volt batteries in automotive, marine, RV, and powersports applications. This weatherproof solar charging system combines a high-efficiency monocrystalline solar panel with an integrated charge controller for safe, automatic battery maintenance.

Key Features:

• 17-watt solar panel delivers up to 3 amps of charging current in optimal sunlight conditions
• 3-step fully automatic charging cycle (bulk, absorption, float) prevents overcharging
• Compatible with multiple battery types: AGM, gel, flooded lead-acid, and lithium iron phosphate (LiFePO4)
• IP67 weatherproof rating protects against dust and water immersion for reliable outdoor use
• Mountable design with compact dimensions: 14.76" L x 13.9" W x 1.12" H
• Built-in solar charge controller regulates power delivery and prevents reverse discharge at night
• Includes 6-foot quick disconnect extension cable for flexible placement
• Two-in-one alligator clips and ring terminal cable included for versatile connection options

This solar charger is ideal for maintaining batteries in vehicles, boats, motorcycles, ATVs, and equipment stored outdoors or in locations without AC power access. The weatherproof construction ensures year-round operation, while the automatic charging system provides safe, maintenance-free battery care.