In direct sunlight (75,000 lux or higher), the solar panel generates enough power to keep the G20 running indefinitely — you never need to charge it. In sub-optimal conditions (cloudy days, shade, early/late rounds), the battery draws on its reserve and lasts up to 180 hours (approximately 30–36 rounds) between charges. A solar intensity indicator on the device shows exactly how much charging is happening in real time. Solar charging works whether the unit is powered on or off.

The 2.2-inch monochrome screen shows distances to the front, middle, and back of the green, hazard distances, dogleg distances, and layup yardages at 200, 150, and 100 yards. Green View shows the shape of the green with manual pin placement. It also has a digital scorecard and stat tracking. When paired with the Garmin Golf app, it adds wind speed and direction, live scoring, and Find My Garmin functionality. It does not show full-color course maps, aerial imagery, or slope-adjusted yardages.

Both provide the same core GPS data: front/middle/back yardages, hazards, doglegs, Green View, digital scorecard, and CT10 compatibility. The G20 Solar adds a larger display (2.2 inches vs 0.9 inches), solar charging for unlimited battery, a built-in magnetic cart mount, big easy-to-read numbers, layup yardage data, wind data via the Garmin Golf app, and Find My Garmin. The G12 is much smaller (25g vs 145g), clips to your pocket or hat, and costs $149.99 vs $299.99. If you want the smallest possible GPS at the lowest price, the G12 is ideal. If you want a cart-friendly device you never need to charge, the G20 Solar fills that role.

The Approach S44 ($299.99) is a GPS golf watch with a color AMOLED display, full-color hole maps, touchscreen interface, smart notifications, fitness tracking, and up to 15 hours of GPS battery. It goes on your wrist, so it’s always accessible. The G20 Solar ($299.99) is a handheld device with a monochrome screen and simpler data, but it has unlimited solar battery life and a magnetic cart mount. The S44 is more feature-rich and versatile. The G20 Solar is for golfers who prefer a cart-mounted device they never have to charge. They’re the same price, so it comes down to wrist vs cart and features vs simplicity.

The G82 ($599.99) is in a different category entirely. It has a 5-inch color touchscreen, full-color CourseView maps, a built-in radar launch monitor (ball speed, club speed, smash factor, tempo), putting metrics, bag mapping, virtual caddie, PlaysLike distance with elevation adjustment, aerial imagery with Garmin Golf membership, and up to 25 hours of GPS battery. The G20 Solar ($299.99) has a monochrome screen, basic yardage data, no launch monitor, no course maps, and no slope adjustment — but it has unlimited solar battery. The G82 is for golfers who want a premium GPS and practice tool. The G20 Solar is for golfers who want simple yardages and never want to charge their device.

No. The G20 Solar is GPS-only. It does not have a radar or any swing analysis capability. For launch monitor data, you’d need the Approach G82 ($599.99) or a standalone launch monitor like the Approach R10 or R50. The G20 Solar can pair with Approach CT10 club tracking sensors for automatic shot tracking, but that’s distance and club data after the shot — not swing metrics.

Approach G20 Solar GPS golf handheld, belt clip, charging/data cable (USB-C), and documentation. The built-in magnetic mount is part of the device — no separate mount is needed for cart use.