Yes—solar charging for camera batteries is possible, but practicality depends on your charger and power needs. Some aftermarket camera chargers can run from a 12V source, while many small solar panels only provide USB-level 5V output, so compatibility is the main issue.

In practice, several photographers find that carrying spare batteries is usually simpler, lighter, and often more economical than bringing a solar setup, especially for a single camera. DSLR batteries can last hundreds of shots per charge, so a few fully charged spares may cover a long trip more easily than a panel and charger.

Solar starts to make more sense if you also need to charge other devices like GPS units or phones, or if your trip is long enough that many spare batteries become impractical. There are portable solar chargers on the market, and users have reported success charging camera Li-ion packs with them, but results vary by battery, charger, and conditions.

So: yes, it can be done, but for a 2–3 week trip, first estimate your real battery usage—spare batteries may be the better solution.