Battery Tender 12V 35W Mountable Solar Battery Charger - 021-1174

The Battery Tender 12V 35W Mountable Solar Battery Charger (021-1174) is a fully portable, permanently mountable solar charging solution designed to keep any 12V battery healthy when shore power simply isn't an option. Whether you're storing a motorcycle in a detached garage, maintaining a seasonal ATV, or keeping a classic car's battery topped off in an outbuilding, this 35-watt solar panel with integrated charge controller delivers set-it-and-forget-it battery maintenance wherever the sun shines.

Key Features & Benefits

• 35-Watt Solar Output with Built-In 3-Step Automatic Microprocessor Controller: The integrated Battery Tender smart controller manages the entire charging process automatically — preventing overcharging and battery discharging without any manual intervention. An LED indicator light displays current charging status so you always know what's happening.
• IP67 Weather-Resistant Rating: Rated IP67 for ingress protection, this panel is built to withstand the elements when permanently mounted outdoors. Rain, dust, and humidity won't compromise performance or safety.
• Spark Proof & Reverse Charging Protection: Built-in safety features protect both the panel and your battery from accidental mis-connection or dangerous sparks — important peace of mind for unattended long-term installs.
• Mountable Design with 4 Mounting Holes: Four included mounting holes let you secure the panel to a roof, wall, trailer, shed, or any outdoor surface, turning it from a portable unit into a permanent solar maintenance station.
• Wide Battery Compatibility: Works with lithium (LiFePO4), standard flooded lead acid, sealed lead acid, AGM, and gel cell batteries — making it versatile across your entire fleet of vehicles and equipment.
• ~15 Ft Total Reach: With an 8 ft DC output cord (20 AWG), a 6 ft extension cord (16 AWG), and a 1.8 ft DC accessory cable (16 AWG), the system gives you approximately 15 feet of total reach from panel to battery — enough flexibility for most mounting scenarios.
• 5-Year Manufacturer Warranty + Lifetime Customer Support: Battery Tender backs this panel with a 5-year limited manufacturer warranty and lifetime customer support, reflecting the brand's confidence in long-term durability.
• CE Certified: Carries CE certification for regulatory compliance.

Specifications

• SKU / MPN: 021-1174
• UPC: 734357117400
• System Voltage: 12V
• Solar Output: 35 Watts
• Output Current Range: 0–45 Watts
• IP Rating: IP67
• Total Reach: ~15 ft
• DC Output Cord: 8 ft — 20 AWG
• Extension Cord: 6 ft — 16 AWG
• DC Accessory Length: 1.8 ft — 16 AWG
• Dimensions (solar panel only): 24.9" x 14.7" x 1.1"
• Weight (solar panel only): 5.55 lbs
• Battery Compatibility: AGM, GEL, Lithium (LiFePO4), Standard Sealed and Flooded Lead Acid
• Certifications: CE, IP67
• Warranty: 5 Years (manufacturer limited)

Fitment

This solar battery charger is not vehicle-specific — it is compatible with any 12V battery system. Ideal applications include:

• Motorcycles and scooters in seasonal or long-term storage
• ATVs, UTVs, and side-by-sides stored without power access
• Lawn tractors and seasonal outdoor power equipment
• Stored classic cars and collector vehicles
• Boats and personal watercraft between seasons
• Golf carts (12V battery systems)
• RVs, campers, and trailers with 12V house or chassis batteries
• Off-grid or overlanding setups
• Farm equipment stored in remote locations

This charger is designed for 12V battery systems only. It is not intended for 6V, 24V, or 48V systems. For best results, it is a maintenance and trickle-charging tool — refer to Battery Tender's guidance if recovering a severely discharged or fully dead battery.

What's in the Box

• 12V 35-Watt Solar Battery Charger Panel
• Solar Charge Controller
• Two-In-One Alligator Clips and Ring Terminal Cable (quick disconnect)
• 6-Foot Quick Disconnect Extension Cable
• Instruction Manual
• 5-Year Manufacturer Warranty documentation

Note: A printable solar panel mounting template for easy installation is available as a downloadable resource from Battery Tender's website.

Why Buy from ThreePiece.us

At ThreePiece.us, we specialize in helping enthusiasts and professionals find the right parts and accessories — and we back every order with the service to match. When you purchase the Battery Tender 021-1174 from us, you get:

• Free Shipping on every order — no minimums, no surprises at checkout.
• Affirm Financing available — split your purchase into manageable payments so you can get the gear you need today.
• Expert Fitment Help — not sure if this is the right solar charger for your setup? Our team is here to help you confirm compatibility before you buy.

Frequently Asked Questions

Q: What types of batteries does the Battery Tender 021-1174 work with?
A: This solar charger is compatible with AGM, gel cell, standard flooded lead acid, sealed lead acid, and lithium (LiFePO4) 12V batteries. It covers the vast majority of battery types used in powersports, automotive, marine, and outdoor power equipment applications.

Q: Can this solar panel charge a completely dead battery?
A: The Battery Tender 35W solar charger is primarily designed for maintaining a healthy battery and slowly recovering batteries with light discharge. For severely depleted batteries, a dedicated AC-powered battery charger may be more appropriate to bring the battery up to an acceptable state before switching to solar maintenance.

Q: How do I mount the solar panel?
A: The panel includes four mounting holes and all the hardware needed to secure it to an outdoor surface such as a roof, wall, or shed. Battery Tender also provides a printable mounting template (available on their website) to simplify layout and drilling. With approximately 15 feet of total cable reach, you have meaningful flexibility in positioning the panel relative to the battery.

Q: Is this solar charger weatherproof enough for permanent outdoor installation?
A: Yes. The Battery Tender 021-1174 carries an IP67 ingress protection rating, meaning it is rated to resist dust intrusion and water immersion — making it suitable for permanent outdoor mounting in typical weather conditions. It also includes spark-proof and reverse charging protection for added safety in unattended installs.