Power supply for Pilot Telraam S2 Outdoor

To power your Telraam S2 Outdoor correctly and safely, it’s important to know which hardware version you’re working with. This guide explains the power requirements for our Pilot version (see picture). If you have our Final version of our Telraam S2 Outdoor, please refer to this page.

1. Power supply

Each Telraam S2 Outdoor unit comes with a pre-mounted cable and a junction box for a waterproof connection. The Pilot version has a DC barrel jack input (12–24 V DC)

⚠️ Warning: Only connect to correct power sources. Using other voltages may permanently damage the unit.

Power Requirements

Input voltage: 12–24 V DC
Connector: Barrel jack (5.5 x 2.1 mm).
Female barrel jack at the end of the cable from the Pilot Telraam S2 Outdoor unit.
Compatible Power Sources: AC/DC adapter (12V or 24V), battery setup with regulated DC output, solar power systems with DC output in the correct range

How to connect

Pass the male barrel jack from your power source through the nut and rubber gaskets on the junction box.
Plug it into the female connector inside the box.
Tighten the nuts securely to ensure a watertight seal.

2. Power sources

The installation and supply of power is the responsibility of the customer. Below are some general suggestions, but Telraam is not responsible for third-party power configurations.

⚠️ Warning: If you're using an external battery (e.g. car battery or DIY power source), remember that the Telraam S2 Outdoor does not include automatic battery cut-off protection. Always use a safe and regulated power source to avoid draining your battery or damaging the device.

Option 1: Solar battery kit

For Telraam S2 Outdoor installations without access to local power, a solar-powered setup is a great option — as long as it’s sized correctly for your location and sunlight availability. For clients in Belgium, we offer pre-tested solar battery kits as an optional add-on (available at additional cost). For clients outside of Belgium, we recommend calculating the Solar Kit Requirements (see more info below).

⚙️ What are the Solar Kit Requirements?

The ideal solar panel and battery size depends on two factors:

Your tolerance for downtime (How okay are you with the device going offline occasionally?)
Your geographical location (Sunlight varies, and so does solar panel efficiency)

To calculate the right balance for your needs, we suggest using this free simulation tool from the European Commission: 🔗 PVGIS Solar Simulation Tool

or scan 032025-Installation-manual-Telraam-S2-Outdoor-(2).png

How to use the tool:

Select your installation location on the map
Enter the Watt-peak value of your solar panel (e.g. 20W, 30W...)
Enter the battery capacity (in Wh)
Enter the power consumption of the device
- Telraam consumes about 1W, so roughly 24Wh per day
Run the simulation
The tool will estimate the percentage of days the device may be offline due to insufficient power

CleanShot-2025-03-21-at-15.12.50@2x.png

🛠️ Installation tips:

Install the photovoltaic panel facing between south-east and south-west
Ensure no shading or obstructions (e.g. trees, buildings, birds with opinions)
Follow the manual of the solar kit for proper setup

Option 2: Power adapter

Make sure it is a power adapter with a 5.5 x 2.1mm male barrel jack, it delivers at least 1.5W, within the 12-24V range, and make it weather proof.

Option 3: external battery

We don’t currently offer a ready-made solution for 12V or 24V (car) batteries . However, it is possible, you’ll just need a little DIY spirit and the right components:

Use car battery or similar battery within 12V-24V range
Connect your car battery using a cable with a 5.5 x 2.1mm male barrel jack.
DIY example:
Ideally, combine this with battery protector. These help avoid draining your battery too low which could damage your battery. (the Victron Energy BatteryProtect 12/24 Volt 65 amp).

Summary

provide your own power supply
- 12–24 V DC power
- 5.5 x 2.1 mm barrel jack
Telraam clients in Belgium may request a solar kit (extra cost)
Power source installation is your responsibility – plan accordingly!