Ditching the Laptop Power Brick: Charging Directly from the Trail 300DC
Converting AC to DC with a traditional laptop charger typically wastes around 10-20% of the energy as heat. For a 60W laptop, that's roughly 6-12W lost just in the charger. It may not sound like much, but if you noticed a shadow covering 10% of your panel, you'd probably move the panel into full sun, right? I know I would!
THE PROBLEM:
I have an older laptop that uses a bulky power brick, but I wanted to charge it directly from my Trail 300DC to improve efficiency and eliminate the extra weight and clutter.
THE SOLUTION:
After a bit of research, I found an easy solution using a USB-C PD to DC barrel adapter cable.
1. Identify your laptop's DC connector. Mine uses a 4.0mm x 1.7mm barrel plug.
2. Check the power requirements. My laptop requires 20V, 3.25A. The key value to match is voltage. Too much voltage can damage equipment. A higher current rating is fine, the laptop will only draw the current it needs.
3. Find a compatible USB-C PD adapter cable. Search for something like: "20V USB-C PD to DC cable 4.0 x 1.7mm" Make sure the cable matches both the voltage and connector size.
4. Ensure your power source can supply enough power. 20V × 3.25A = 65W. The Trail 300DC USB-C outputs can provide up to 140W, so it has plenty of capacity.
THE RESULT:
I can now charge my laptop directly from the Trail 300DC using DC power only, with no AC power brick required.
Less weight, less clutter, and I can now charge my old laptop with 100% free energy. Happy days!
I've attached a few photos. Feel free to ask any questions if you're thinking of doing the same. Happy travelling 😊