1. Product Overview
The Sollos 120w Outdoor Landscape Lighting Transformer is designed to provide safe and efficient low-voltage power for your outdoor lighting systems. Featuring a durable stainless steel housing, this transformer includes a built-in photocell for automatic dusk-to-dawn operation and an integrated timer for customizable lighting schedules. It is compatible with both Halogen and LED lighting installations, offering versatility for various landscape lighting needs.

Front view of the Sollos 120w Outdoor Landscape Lighting Transformer, showcasing its stainless steel housing and integrated control panel with photocell and timer display.
2. Safety Information
- Electrical Hazard: Always disconnect power at the circuit breaker before installing, servicing, or cleaning the transformer. Failure to do so can result in serious injury or death.
- Qualified Electrician: Installation should be performed by a qualified electrician or in accordance with local electrical codes.
- Outdoor Use Only: This transformer is designed for outdoor use. Ensure it is mounted in a location protected from direct water spray and excessive moisture.
- Proper Wiring: Use only low-voltage landscape lighting cable suitable for direct burial or outdoor use. Do not exceed the transformer's maximum wattage capacity (120W).
- Grounding: Ensure the transformer is properly grounded according to local electrical codes.
- Ventilation: Do not obstruct the ventilation openings of the transformer.
3. Package Contents
Please check the package contents to ensure all items are present and undamaged:
- Sollos 120w Outdoor Landscape Lighting Transformer Unit
- User Manual
- Mounting Hardware (screws, anchors)
4. Features
- Stainless Steel Housing: Provides durability and resistance to outdoor elements.
- Use with LED OR Halogen: Versatile compatibility with various low-voltage lighting types.
- Integrated Photocell: Automatically turns lights on at dusk and off at dawn.
- Integrated Timer: Allows for programmable lighting schedules.
- 12V Output: Designed for standard 12-volt landscape lighting systems.
5. Specifications
| Attribute | Value |
|---|---|
| Brand | Sollos |
| Model Number | SOL TR15SS-INT-120 |
| Power Source | Electric |
| Output Voltage | 12V AC |
| Maximum Wattage | 120W |
| Housing Material | Stainless Steel |
| Mounting Type | Wall Mount |
| Item Weight | 7.48 pounds |
| Package Dimensions | 10 x 7.5 x 7 inches |
| UPC | 636134771006 |
6. Setup and Installation
- Choose a Location: Select a suitable outdoor location near a GFCI (Ground Fault Circuit Interrupter) protected electrical outlet. The location should be easily accessible and protected from direct water spray. The transformer is designed for wall mounting.
- Mount the Transformer: Securely mount the transformer to a sturdy surface using appropriate mounting hardware. Ensure it is level and stable.
- Connect Low-Voltage Cables: Route your low-voltage landscape lighting cables from your fixtures to the transformer. Connect the cables to the 12V output terminals on the transformer, ensuring proper polarity. This transformer is designed for 12V systems only.
- Connect Power: Plug the transformer's power cord into the GFCI protected electrical outlet.
- Test System: Before fully burying cables or finalizing installation, test your lighting system to ensure all lights are functioning correctly.
Important: Ensure the total wattage of all connected lights does not exceed the transformer's 120W capacity. Overloading the transformer can cause damage and pose a fire hazard.
7. Operating Instructions
The Sollos transformer features an integrated photocell and timer for automated operation.
- Photocell Operation (Dusk-to-Dawn):
The built-in photocell detects ambient light levels. When set to "Auto" or "Photocell" mode, the transformer will automatically turn on your landscape lights at dusk and turn them off at dawn. Ensure the photocell sensor is not obstructed by debris or direct artificial light sources, as this can interfere with its operation.
- Timer Operation:
The integrated timer allows you to set specific durations for your lights to remain on after dusk. Common timer settings include 4, 6, 8, or 10 hours, or a continuous "ON" mode. Refer to the specific controls on your transformer's panel to cycle through the timer options and select your desired duration. The lights will turn off automatically after the set time has elapsed or at dawn, whichever comes first.
- Manual ON/OFF:
Most transformers also include a manual ON/OFF switch or button, allowing you to override the automatic settings and turn the lights on or off as needed.
Consult the control panel on your specific unit for detailed instructions on setting the timer and selecting operating modes.
8. Maintenance
- Cleaning: Periodically clean the exterior of the transformer with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the photocell lens is clean and free of dirt or obstructions.
- Inspection: Regularly inspect the power cord, low-voltage cables, and connections for any signs of damage, fraying, or corrosion. Address any issues promptly to prevent electrical hazards.
- Ventilation: Ensure that the ventilation openings on the transformer remain clear of debris, leaves, or other obstructions to prevent overheating.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights not turning on. | No power to transformer; tripped GFCI; faulty photocell; incorrect timer setting; overloaded circuit; loose connections; faulty bulbs. | Check power outlet and GFCI. Ensure photocell is not obstructed. Verify timer setting. Reduce load if overloaded. Check all wiring connections. Replace faulty bulbs. |
| Lights stay on continuously. | Photocell obstructed or faulty; timer set to "ON" or incorrect duration. | Clear photocell. Ensure no artificial light is hitting the photocell. Adjust timer setting. |
| Lights flicker or are dim. | Loose connections; insufficient wire gauge for distance; overloaded transformer; faulty bulbs. | Check and tighten all connections. Ensure appropriate wire gauge is used. Reduce load on transformer. Replace faulty bulbs. |
| Transformer makes humming noise. | Normal operation (slight hum); overloaded transformer. | A slight hum is normal. If loud or accompanied by other issues, check for overload. |
If troubleshooting steps do not resolve the issue, contact a qualified electrician or customer support.
10. Warranty and Support
The Sollos 120w Outdoor Landscape Lighting Transformer comes with a 2-year warranty from the date of purchase, covering defects in materials and workmanship under normal use.
This warranty does not cover damage resulting from improper installation, misuse, abuse, neglect, accidents, unauthorized repairs or modifications, or acts of nature.
For warranty claims or technical support, please contact Sollos customer service. Keep your proof of purchase for warranty validation.
For further assistance, please visit the official Sollos website or contact their customer support channels.