Garmin Edge 1040 Solar Review: The Long-Haul Head Unit

Garmin's Edge 1040 Solar answers one question and answers it well: how do you stop worrying about the head unit dying before the ride does? Up to 45 hours in demanding use, up to 100 hours if you dial it back, and a Power Glass lens that harvests light while you ride. That is the pitch, and for audax riders, tourers and anyone who has watched an Edge blink out at hour 14 of an event, it is a compelling one.

The rest of the story is more complicated. It launched in 2022, the 1050 has since taken the crown for screen quality and features, and solar gain in British light is a bonus rather than a plan. We rate it 4.3 out of 5, with almost all of that score earned by stamina and accuracy rather than novelty.

Who should buy it

Long-distance riders, mostly. If your riding involves 300km days, unsupported touring, multi-day bikepacking or 24 hour events, the 1040 Solar removes an entire category of anxiety. It also suits riders who train with power and want every metric Garmin produces, since the 1040 series still carries the full training load, recovery and stamina suite.

Anyone riding two to four hours at a time is buying capacity they will never touch. Look at the Edge 850 for a smaller, cheaper unit with the newer software, or the Edge 1050 if you want the best screen Garmin makes.

Check the Garmin Edge 1040 Solar price

The battery claim, examined

Garmin's own manual puts the standard Edge 1040 at up to 35 hours and the Solar version at up to 45 hours, with the solar figure earned in 75,000 lux conditions (Edge 1040 owner's manual specifications). That lux figure is the bit worth reading twice. It describes strong direct sunlight, the sort you get on an alpine col in July rather than a Yorkshire lane in November.

So the honest way to think about it: you are buying a 35 hour computer that becomes a 45 hour computer when the sun cooperates, and that stretches towards 100 hours if you accept battery saver mode with its dimmed screen and reduced recording. For a rider crossing France in summer, that is transformative. For a commuter, it is a spec sheet line.

Accuracy and navigation

Multi-band GNSS is the underrated headline. Older Edges wander in city centres and lose the plot under dense canopy; the 1040 series holds a line through both. Ride a wooded loop you know the length of, compare the recorded distance to an older unit, and the difference is usually obvious.

Mapping is Garmin's usual strength, with turn-by-turn on preloaded cycling maps, ClimbPro showing what is left of the climb you are grinding up, and rerouting that recovers sensibly when you miss a turn. The 3.5 inch screen makes a real difference here compared with the compact units; it is the reason plenty of riders stick with the big Edge despite the bulk.

Where it now shows its age is polish. There is no speaker for audible prompts, no contactless payments, and the display, while good, is not as bright or as sharp as what the 1050 delivers. Garmin lists the full spec on the official Edge 1040 Solar page.

Value, and a warning about price

Buy this unit for the battery or do not buy it at all. On Amazon UK it has recently sat above £500, which is more than a discounted 1050 and well over double the price of an Edge Explore 2. Check the listing price against Garmin's own store before ordering, because third-party stock on an older flagship can drift upwards when supply thins out.

If it is close to the newer units on price and you are not riding ultra distance, buy something newer. If you have a 400km day in the diary and no interest in strapping a battery pack to the bars, this is still the sensible pick.

See current Edge 1040 Solar stock and price

Verdict

Recommended reads

1. Garmin Edge 850 review
2. Garmin Edge 1050 review
3. Garmin Edge 540 Solar review
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