Amazfit T-Rex Dual Solar looks set to bring solar charging to the T-Rex range

Amazfit appears to be preparing its first solar-charging T-Rex watch.

A Malaysian SIRIM regulatory filing lists model A2570 under the name T-Rex Dual Solar. The filing was approved on 3 August. Similar regulatory activity has reportedly appeared in Indonesia, South Korea and the Eurasian Economic Union, first spotted by WearableFans, adding weight to the idea that this is a real product rather than an early prototype.

That does not mean Amazfit has officially announced the watch yet. The regulatory filings are strong evidence that the hardware is moving towards release, but there is still no confirmed launch date.

The first clues appeared earlier in the year. Code found in the Zepp Health app reportedly contained references to solar intensity and separate solar power inputs. Those references appeared before the T-Rex Dual Solar name was linked to the project.

There was also a brief appearance of an unbranded rugged Amazfit watch on the company’s Spanish Instagram account in July. Reports described it as having a red bezel and a display that looked different from the AMOLED screens used by current T-Rex models. That could point towards a more power-efficient reflective display, although the image alone does not confirm the screen technology.

The timing makes sense. The current T-Rex Ultra 2 already has an 870mAh battery and is rated for up to 30 days of typical use. It uses a 1.5-inch AMOLED display.

Zepp Health has also said it plans to continue expanding its range of performance-focused wearables in 2026. That makes a new T-Rex model plausible, but it is too early to say exactly where the Dual Solar will sit in the range.

IFA 2026 is an obvious possible launch window. The Berlin show runs from 4–8 September, but there is currently no confirmation that Amazfit will launch the T-Rex Dual Solar there.

Solar has mostly meant MIP displays in sports watches

Garmin introduced solar charging to its fēnix range in 2019 with the fēnix 6X Pro Solar. Garmin’s Power Glass placed a transparent solar layer in the watch’s lens, allowing sunlight to extend battery life.

Garmin has since expanded solar across several outdoor ranges, including fēnix and Instinct. It has also kept the choice between display technologies: current fēnix 8 models are available with either AMOLED or solar-powered displays, rather than combining the two in the same version.

Suunto took a similar route with the first-generation Vertical, which was available with solar charging. The Vertical 2 moved to a 1.5-inch AMOLED display and dropped solar. Suunto quotes up to 65 hours of battery life for the Vertical 2 in its higher-performance GPS mode.

COROS has used solar on the DURA cycling computer, rather than on one of its watches. COROS rates the DURA for long GPS runtimes with solar assistance, although real-world battery life naturally depends on settings, GPS mode and sunlight.

Its watches have continued to rely on large batteries and efficient displays instead. That approach can produce impressive runtimes without solar panels, which is one reason a solar T-Rex would be an interesting change for Amazfit rather than simply an obvious upgrade.

Why solar and AMOLED are difficult to combine

The basic problem is power.

A solar panel small enough to fit inside a watch can only produce a limited amount of electricity. A low-power reflective display such as MIP can operate with relatively little energy, so solar input can make a noticeable difference to battery life.

AMOLED screens are much more power-hungry when they are bright or showing lots of content. That makes it harder for a small solar panel to offset the watch’s total power consumption.

There is another problem: the solar material has to sit somewhere in the display stack. More material between the screen and the outside world can reduce the amount of light reaching the display. That is less of a problem with a reflective display, which already relies on ambient light, than with a bright self-emitting AMOLED panel.

Garmin’s current product range shows the practical compromise. The fēnix 8 is offered as either an AMOLED watch or a solar model, with the solar version using Power Sapphire. Garmin does not currently combine the two technologies in the same fēnix 8 display.

That makes the reported display of the T-Rex Dual Solar particularly important. If Amazfit really is moving back to a reflective display, the trade-off would be familiar: less punchy colour and brightness than AMOLED, but potentially much longer battery life and a better platform for solar charging.

For someone who spends weeks hiking, camping or travelling away from a charger, that could be a worthwhile trade. For someone who mainly wants the brightest and sharpest smartwatch screen, an AMOLED T-Rex remains the more obvious choice.

Quick answers

What is the Amazfit T-Rex Dual Solar?
It appears to be a forthcoming Amazfit T-Rex model with solar charging. A Malaysian SIRIM filing identifies model A2570 by that name, but Amazfit has not yet made a full public announcement.

When will the Amazfit T-Rex Dual Solar launch?
There is no confirmed launch date. IFA 2026 takes place from 4–8 September, making it a possible launch window, but there is currently no evidence that Amazfit has confirmed the event as the launch date.

Will it have an AMOLED display?
That is not confirmed. Reports of an unbranded Amazfit rugged watch with a different-looking display have led to speculation that the Dual Solar could use a reflective or MIP-type screen. Until Amazfit publishes the specifications, that remains speculation.

Why are solar sports watches usually paired with MIP displays?
Because MIP displays can use much less power than bright AMOLED screens. That makes the limited energy available from a small watch-sized solar panel more useful.

Is the T-Rex Dual Solar officially confirmed?
The model name has appeared in a regulatory filing, which is strong evidence that the product exists. What has not yet been confirmed is the final specification, price, launch date or retail availability.

Source and original research by: the5krunner and Wearable Fans.

Last Updated on 11 September 2026 by the5krunner

the5krunner

tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID