1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your DEWENWILS Low Voltage Landscape Transformer, Model HOSL04C2. This device is designed to convert standard 120V AC household voltage to a safer 12V/14V AC for outdoor landscape lighting systems. It features smart control capabilities, including voice control, remote app access, and advanced scheduling functions.

Figure 1.1: DEWENWILS Low Voltage Landscape Transformer. This image displays two variations of the transformer unit, highlighting their compact design and integrated power cords.
2. Safety Information
Please read and understand all safety instructions before installing or operating this transformer. Failure to follow these instructions may result in electric shock, fire, or other hazards.
- This transformer is designed for outdoor use and is weatherproof. However, ensure it is mounted in a location that minimizes direct exposure to extreme weather conditions.
- Always disconnect power at the circuit breaker before installing or servicing the transformer or connected lighting.
- Do not exceed the maximum wattage rating of the transformer (300W). Overloading can cause damage and fire hazards.
- Ensure all wire connections are secure and properly insulated to prevent short circuits.
- This product is UL and cUL certified, indicating compliance with North American safety standards.
- The transformer includes integrated overload and short circuit protection for enhanced safety.

Figure 2.1: Safety Features. This illustration highlights the ETL listing, overload protection, and short circuit protection mechanisms built into the transformer, ensuring safe operation.
3. Product Features
The DEWENWILS Low Voltage Landscape Transformer offers a range of advanced features for convenient and efficient control of your outdoor lighting:
- Voice Control & Remote Control: Compatible with Amazon Alexa and Google Home Assistant for hands-free operation. Control your landscape lights via voice commands or through your smartphone using the DEWENWILS app. No additional hub is required.
- Schedule & Timer Function: Offers four distinct timer modes: programmable timer, countdown timer, holiday random, and security random modes, including a Circulate mode. Vacation mode enhances home security by simulating occupancy.
- 3 Independent Control Channels: Features three separate output channels (12Vac or 14Vac selectable) allowing you to control different zones of your landscape lighting independently. This enables customized lighting for various areas such as pathways, gardens, and architectural features.
- Astronomical & Dusk to Dawn: Utilizes an astronomical digital photocell via the DEWENWILS app, enabling precise dusk-to-dawn operation or any combination of timer and clock settings based on local sunrise and sunset times.
- Safe and Reliable: Prevents overloading and short circuits with integrated surge protection. The unit is FCC certified and constructed with a metal shield (SPCC Steel) and waterproof coating for maximum rust resistance and longevity, ensuring durability in outdoor environments.

Figure 3.1: APP & Voice Control. This image illustrates the transformer's compatibility with Alexa and Google Home, along with control via the DEWENWILS mobile application.

Figure 3.2: Three Independent Controlled Outputs. This diagram details the wiring terminals for the three distinct output channels, allowing for segmented control of landscape lighting systems.

Figure 3.3: Weatherproof and Durable Design. This image demonstrates the transformer's robust construction, featuring a metal shield and waterproof coating for enhanced durability against outdoor elements.
4. Setup and Installation
Follow these steps for proper installation of your landscape transformer:
- Choose a Mounting Location: Select a suitable outdoor location near a 120V AC GFCI (Ground Fault Circuit Interrupter) outlet. The transformer is designed for wall mounting. Ensure the location is accessible for wiring and maintenance, and protected from direct water accumulation.
- Mount the Transformer: Securely mount the transformer to a sturdy surface using appropriate screws and anchors. Ensure it is level and stable.
- Connect Low Voltage Cables:
- Strip approximately 1/2 inch of insulation from the ends of your low voltage landscape lighting cables.
- Connect the cables to the appropriate terminals on the transformer (COM, 12V, or 14V). The 12V output is suitable for most standard low voltage lighting, while 14V can be used for longer cable runs or to compensate for voltage drop.
- Ensure screw connections are tight (1.06 in-lbs / 0.12 Nm) and that only solid or stranded type wires (12-18 AWG) are used.
- Utilize the three independent channels to separate your lighting zones as desired.
- Plug In the Transformer: Once all low voltage connections are made and secured, plug the transformer's power cord into a 120V AC GFCI outlet.
- Initial Power-Up: The transformer will power on. Refer to the Operating Instructions section for app setup and control.
5. Operating Instructions
Control your DEWENWILS Low Voltage Landscape Transformer using the DEWENWILS app or voice commands.
5.1. DEWENWILS App Setup
- Download the DEWENWILS app from your smartphone's app store (iOS or Android).
- Register or log in to your account.
- Ensure your smartphone is connected to a 2.4GHz Wi-Fi network (5GHz networks are not supported).
- Follow the in-app instructions to add your new transformer. The app will guide you through the pairing process, often involving a Bluetooth connection for initial setup.
- Once connected, you can rename the transformer and its individual channels for easier identification.
5.2. Remote APP & Voice Control
- App Control: Use the DEWENWILS app to manually turn on/off each of the three independent lighting channels.
- Voice Control: Link your DEWENWILS account to Amazon Alexa or Google Home Assistant through their respective apps. Once linked, you can use voice commands such as:
- "Alexa, turn on the patio lights."
- "Hey Google, turn off the garden lights."
5.3. Schedule & Timer Functions
The DEWENWILS app provides comprehensive scheduling options:
- Programmable Timer: Set specific ON/OFF times for each channel on desired days of the week. You can create up to 30 groups of schedules.
- Countdown Timer: Set a countdown for the lights to turn off after a specified duration.
- Holiday Random Mode: Randomly turns lights on and off during a set period to simulate occupancy, enhancing security while you are away.
- Security Random Mode: Similar to holiday random, providing a deterrent against intruders.
- Circulate Mode: Allows for repetitive on/off cycles.

Figure 5.1: Timer and Schedule Functions. This image shows the app's scheduling capabilities, allowing users to program specific on/off times for their landscape lighting.
5.4. Astronomical Digital Photocell
This feature allows for automated lighting based on local sunrise and sunset times:
- In the DEWENWILS app, enable the astronomical feature.
- The app will use your location to determine precise dusk and dawn times.
- You can set lights to turn on at dusk and off at dawn, or combine this with other timer settings for customized operation.

Figure 5.2: Astronomical Digital Photocell. This visual demonstrates how the DEWENWILS app uses location data to automatically adjust lighting based on local sunrise and sunset times.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your DEWENWILS Low Voltage Landscape Transformer.
- Cleaning: Periodically wipe down the exterior of the transformer with a damp cloth to remove dirt and debris. Do not use abrasive cleaners or immerse the unit in water.
- Inspect Wiring: Annually inspect all low voltage wiring for any signs of damage, fraying, or exposed conductors. Repair or replace damaged wires immediately.
- Check Connections: Ensure all terminal connections remain tight and free of corrosion. Loose connections can lead to poor performance or overheating.
- Environmental Check: Ensure the transformer's mounting location remains clear of obstructions that could impede ventilation or expose it to excessive moisture.
7. Troubleshooting
If you encounter issues with your DEWENWILS Low Voltage Landscape Transformer, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights not turning on |
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| App cannot connect to transformer |
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| Lights flicker or are dim |
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8. Specifications
| Model Number | HOSL04C2 |
| Brand | DEWENWILS |
| Input Voltage | 120V AC |
| Output Voltage | 12V AC / 14V AC (Selectable) |
| Max Wattage | 300W |
| Control Channels | 3 Independent Channels |
| Connectivity | 2.4GHz Wi-Fi, Bluetooth (for setup) |
| Compatibility | Amazon Alexa, Google Home Assistant, DEWENWILS App |
| Mounting Type | Wall Mount |
| Certifications | UL, cUL, FCC |
| Power Source | Corded Electric |
| First Available | July 16, 2024 |
9. Warranty and Support
DEWENWILS products are designed for reliability and performance. For specific warranty details, please refer to the warranty card included with your product or visit the official DEWENWILS website. If you require technical assistance or have questions regarding your Low Voltage Landscape Transformer, please contact DEWENWILS customer support through their official channels. Support information can typically be found on the product packaging or the DEWENWILS brand store on Amazon.
Online Support: Visit the DEWENWILS Store on Amazon