Deye Inverter Cooler – Dual 120mm Fan Mount
Print Profile(1)
Description
This cooling shroud is designed to improve airflow around Deye hybrid inverters, specifically designed around the Deye SUN-5K-SG04LP1-AU.
The design mounts two standard 120mm fans to actively pull heat away from the inverter cooling area while providing a central compartment for electronics such as fan controllers, relays, or ESP modules. In my example I have a simple 240v to 12v PSU with a PWM fan controller that will ramp up fan speed depending on the temperature.
⚠️ Since inverter dimensions may vary slightly between models, please check your inverter dimensions before printing.
Features
- Dual 120mm fan mounts for strong airflow - use standard fan screws to secure the fan to the lower portion of the model
- Central electronics compartment for controllers, relays, or ESP modules
- Designed around Deye SUN-5K-SG04LP1-AU
- No fixings required for the fan unit – the unit simply rests on top of the inverter
- Clean airflow path across the inverter cooling area
Assembly
The print consists of 6 parts.
- Parts are designed to be super glued together
- The top shell sits on top of the bottom shell
- The assembled unit is then placed directly on top of the inverter
Because the design is self-supporting, no screws or mounting brackets are required.
Please let me know id assembly instructions are required, I allowed for them to fit together easily.
Electronics Compartment
The middle section provides space to install small electronics such as:
- ESP32 / ESP8266 fan controller
- Temperature controller
- Relay modules
- PWM fan controller
This allows you to automate cooling based on inverter temperature or load.
Fans
Supports standard 120mm PC fans.
You can run them:
- Always on
- Temperature controlled
- Load controlled via automation (Home Assistant, ESPHome, etc.)
Print Settings
Recommended:
- Material: PETG / ASA
- Layer height: 0.2 mm
- Infill: 15–20%
- Supports: Not required
If installing outdoors or in hot environments, ASA is recommended.
Results
After installing, you should see temps drop at least 10 degrees C on a hot or heavy load day (indoors)
If anyone wanted to see the data.. I turned off the fan around 12pm, but forgot to turn them back on for a few hours (oops). Peaked around 70 C, before I turned the fans back on showing a sharp decline.
When the fans are on, it hovers around 55 C at peak load/generation.
You can read a little more detail on my blog:
https://extruder.co.nz/keeping-a-deye-inverter-cool-a-3d-printed-dual-fan-solution/
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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