Electric actuators linear https://www.progressiveautomations.ca/collections/linear-actuators are perfect for this task. These are durable and precise devices often used in solar trackers. The company has models with feedback sensors and fine-tuning angle adjustment. All of them are designed for continuous outdoor operation. You can order the required force and stroke length, as well as a controller for synchronous movement. I've been using this system for three seasons now - the panels automatically adjust their position, and output has increased by about 20%.