The Vector Optics Frenzy Solar is another option for a solar powered aiming device. But is it good enough? Fox Green got one to review. This has an extra large window size with 3 MOA Dot Size offers a spacious field of view, a removable protective shroud for added durability, and an impressive 80,000 hours of battery life thanks to its motion sensor feature. With 9 red illumination settings and 2 night vision modes, it's versatile for both day and night use.