Home » RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 25 Amp with 33-Watt Solar Panel | RC20-DW-7W
**Title:** RoadCharger Auxiliary Battery Charger with 7-Way Connector **Alt Text:** Portable solar charging kit with foldable panel, charge controller, DC cabling, and connectors for 12 V/24 V battery systems. **Meta Description:** Discover the RoadCharger RC20-DW-7W, a smart auxiliary battery charger with a 7-way connector and 33-watt solar panel for efficient trailer battery maintenance.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp | RC20-DW-7W **Meta Description:** Discover the RoaDCharger, a smart charging solution with a 7-Way Connector and solar panel, ideal for keeping your trailer battery charged on the go. **Alt Text:** RoaDCharger graphic showing motorhome, dump truck, aerial lift.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp **Meta Description:** Discover the RoaDCharger Auxiliary Battery Charger with 7-Way Connector, featuring a smart solar-charging system to maintain trailer battery health when parked. **Alt Text:** Semi-truck with foldable solar panel charging battery via RoaDCharger system.
RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp | RC20-DW-7W; includes solar panel, road charger, 7-way plug, and Anderson connections.
**Title:** RoaDCharger Auxiliary Battery Charger - 20 Amp | RC20-DW-7W **Meta Description:** Discover the RoaDCharger with a 33W flexible solar panel and 7-way connector, offering smart charging for dump trailer batteries anytime, anywhere. **Alt Text:** Flexible 33W solar panel with MC4 connector, exploded laminate stack view, and 7-way trailer plug for the RoaDCharger Auxiliary Battery Charger.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector **Meta Description:** Discover the RoaDCharger, a smart auxiliary battery charger with a 7-way connector and 33-watt solar panel, perfect for maintaining trailer batteries efficiently. **Alt Text:** RoaDCharger kit with flexible solar panel, charge controller, DC power cables, and adapter harness for battery charging.
A red and black logo of the RoaDCharger 20 Amp Auxiliary Battery Charger with 7-Way connector, enhancing productivity by recharging trailer batteries on the go.
**Title:** RoadCharger Auxiliary Battery Charger with 7-Way Connector **Alt Text:** Portable solar charging kit with foldable panel, charge controller, DC cabling, and connectors for 12 V/24 V battery systems. **Meta Description:** Discover the RoadCharger RC20-DW-7W, a smart auxiliary battery charger with a 7-way connector and 33-watt solar panel for efficient trailer battery maintenance.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp | RC20-DW-7W **Meta Description:** Discover the RoaDCharger, a smart charging solution with a 7-Way Connector and solar panel, ideal for keeping your trailer battery charged on the go. **Alt Text:** RoaDCharger graphic showing motorhome, dump truck, aerial lift.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp **Meta Description:** Discover the RoaDCharger Auxiliary Battery Charger with 7-Way Connector, featuring a smart solar-charging system to maintain trailer battery health when parked. **Alt Text:** Semi-truck with foldable solar panel charging battery via RoaDCharger system.
RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 20 Amp | RC20-DW-7W; includes solar panel, road charger, 7-way plug, and Anderson connections.
**Title:** RoaDCharger Auxiliary Battery Charger - 20 Amp | RC20-DW-7W **Meta Description:** Discover the RoaDCharger with a 33W flexible solar panel and 7-way connector, offering smart charging for dump trailer batteries anytime, anywhere. **Alt Text:** Flexible 33W solar panel with MC4 connector, exploded laminate stack view, and 7-way trailer plug for the RoaDCharger Auxiliary Battery Charger.
**Title:** RoaDCharger Auxiliary Battery Charger with 7-Way Connector **Meta Description:** Discover the RoaDCharger, a smart auxiliary battery charger with a 7-way connector and 33-watt solar panel, perfect for maintaining trailer batteries efficiently. **Alt Text:** RoaDCharger kit with flexible solar panel, charge controller, DC power cables, and adapter harness for battery charging.
A red and black logo of the RoaDCharger 20 Amp Auxiliary Battery Charger with 7-Way connector, enhancing productivity by recharging trailer batteries on the go.
Healthy Battery

RoaDCharger Auxiliary Battery Charger with 7-Way Connector - 25 Amp with 33-Watt Solar Panel | RC20-DW-7W

In stock
SKU: RC25A-12V-7WAY-30W
(1)
$ 349.99
Sale $ 599.00 $ 349.99
Type

We offer the following methods of delivery:

  • Same day Freight Shipping when ordered Mon-Fri before 12pm central time. (excluding holidays)
  • Pickup from our Mandeville, Louisiana warehouse
  • In some cases, free shipping - please contact us: sales@primarymover.com or call 985-888-6554

🔌 Road Charger – Smart Charging for Dump Trailers & Auxiliary Batteries

Keep Your Dump Trailer Battery Charged — Anytime, Anywhere

The Primary Mover Road Charger is an all-in-one smart charging solution designed specifically for dump trailers and auxiliary battery systems. This system charges your battery while driving and offers optional solar support to maintain battery life when parked.

⚙️ Available Configurations

We offer three versions to fit your setup:

  • 7-Way + Solar Kit (Plug & Play): Uses your trailer plug for charging while driving + includes 33W solar panel
  • Direct Wire + Solar Kit: Hardwired for dedicated vehicle connection + includes 33W solar panel
  • 24V Direct Wire Kit: Designed for 24V systems, direct wire only (no solar)

✅ Key Features

  • Smart Road Charging (20–25 Amps): Efficiently pulls power from your vehicle to charge auxiliary batteries while driving
  • Triggers Smart Alternators: Creates demand to increase alternator output for consistent charging
  • Solar Maintenance Charging (Select Models): 33W panel keeps batteries maintained when parked
  • Flexible Installation Options: Choose between plug-and-play 7-way connection or direct battery wiring
  • Smart Float Mode: Prevents overcharging and extends battery life
  • Charge While You Drive: No need for shore power — your vehicle becomes the charging source

📦 What’s Included

All Kits Include:

  • Road Charger Module (Smart DC-to-DC Charger)
  • Output Wiring & Battery Connection Leads

7-Way + Solar Kit Includes:

  • 33-Watt Solar Panel
  • 7-Way Male-to-Female Pass-Through Plug
  • 9-ft Wire Whip with Anderson Connection

Direct Wire + Solar Kit Includes:

  • 33-Watt Solar Panel
  • 30 ft 8-Gauge Direct Wire Kit (Fuse Protected, Ring Terminals Pre-Installed)

24V Direct Wire Kit Includes:

  • 30 ft 8-Gauge Direct Wire Kit (Fuse Protected, Ring Terminals Pre-Installed)
  • Note: Solar panel is not included or currently compatible with 24V systems

📘 Manual

Download Product Manual

❓ Frequently Asked Questions

What’s the difference between 7-way and direct wire?

The 7-way version is plug-and-play and uses your trailer’s existing 7-way harness. The pass-through plug installs between your trailer and towing vehicle, making it an easy way to use existing wiring to power the Road Charger.

The direct wire version connects straight to your vehicle’s battery, requiring you to run wire to the front of the vehicle. While it may slightly reduce resistance, the main difference is application — the direct wire setup typically stays with the vehicle, while the 7-way version stays with the trailer and can be used across multiple vehicles.

The 7-way option is ideal for flexibility and ease of use, while direct wire is better suited for dedicated setups or vehicles without a 7-way plug.

Can I use the solar panel on the 24V version?

Currently, no. The solar panel is designed for 12V systems only and is not compatible with the 24V configuration at this time. Future versions may support solar integration.

Can I shorten the direct wire harness?

Yes. The kit includes a 30 ft 8-gauge wire with ring terminals pre-installed. You can cut the wire to your desired length and re-terminate as needed for your installation.

Will this work with modern smart alternators?

Yes. The Road Charger is designed to create a load demand that helps activate modern smart alternators, allowing them to increase output and provide consistent charging while driving.

Is this better than a standard trailer charger?

Absolutely. This is an onboard charging system that uses your vehicle’s full capability while driving. Unlike traditional AC chargers that require shore power, the Road Charger keeps your battery charged automatically every time you’re on the road.