Charge Your E-Bike With the Sun: HPC 400W MPPT Solar Controller

Imagine topping up your battery miles from the nearest outlet. With the HPC 400W MPPT Solar Charge Controller, off-grid charging isn't a fantasy — it's a bolt-on capability. If you want a real solar ebike charger for overlanding, bikepacking, or emergency range, here's how it works.

How solar charging works for e-bikes

Solar panels produce variable voltage that changes with sunlight and temperature — you can't wire them straight to a battery. A charge controller sits between the panel and your pack, converting that raw solar output into a safe, correct charge. The HPC unit does exactly that, purpose-built for e-bike battery voltages.

Why MPPT matters

MPPT stands for Maximum Power Point Tracking. In plain terms, an MPPT controller constantly finds the most efficient operating point of your panel and squeezes the most usable energy out of it — meaningfully more than a basic controller, especially in less-than-perfect light. More harvested watts means faster, more reliable off-grid charging.

Wide battery compatibility

• 400W of solar input — enough to meaningfully charge on a sunny day.
• 48V, 52V, 63V, 74V, and 86V support — works across the full range of e-bike battery voltages.
• Built for the outdoors — the tool that makes true off-grid e-bike travel possible.

Who it's for

Overlanders, bikepackers, hunters, and anyone who rides beyond the reach of the grid. Pair it with panels and you can extend your range indefinitely as long as the sun's out. Building a complete off-grid setup? Check out our SunCapture solar charging system.

Go off-grid. Shop the solar controller. Questions on panels or battery compatibility? Email sales@hpcbikes.com or call (818) 734-1600.