Review: Sunseeker Elite X5 Gen 2 robotic lawnmower adds new navigation

Robot lawnmowers have reached an interesting point in their evolution. For years they were smart devices that worked quite well if you were willing to bury a perimeter wire, fiddle with an RTK antenna, and occasionally rescue them from flower beds after they became hopelessly confused. The new generation aims much higher. The Sunseeker Elite X5 Gen 2 wants to be less of a “lawn vacuum robot” and more of an “autonomous gardener.”

After looking at what the X5 Gen 2 brings to the table, it’s clear that Sunseeker has spent its engineering budget carefully. Instead of looking for gimmicks, the company focused on navigation, terrain handling and versatility, three things that have proven frustrating to robotic lawnmower owners. The configuration, however, remains a sticking point.

The headline feature is Sunseeker’s AONavi navigation system, which combines networked RTK positioning with VSLAM 2.0 visual navigation.

Yeah, I read all those buzzwords too. In simple terms, the mower uses satellites and cameras together instead of relying on buried boundary wires. If satellite reception becomes unreliable under trees or near structures, the visual navigation system keeps it moving precisely instead of wandering around like a confused Roomba around a lost shoe (assuming you removed the camera’s protective film, which I didn’t for some time before realizing my mistake).

This is a significant improvement, because traditional robotic lawnmowers often require hours of installation before they can cut a blade of grass. Digging trenches for perimeter wire is not difficult, but it is certainly not fun. Eliminating that step removes one of the biggest barriers to ownership.

The problem is that it eliminates the barrier by adding a new one: that is, having to travel the perimeter with the lawnmower slowly and carefully. Even then, it may take several tries and repositioning of the receiving antenna to get it right. Be prepared to mount the antenna on the roof or spend a lot of time finding the right position.

The X5 Gen 2 is designed for properties up to about half an acre (2,000 square meters), putting it squarely in the sweet spot for suburban homeowners. It’s big enough to justify automation without getting into state-level pricing territory. My own property is about that size, although actual grass comprises less than a third of that total. Our backyard is chicken territory and we have plenty of pavement to park on.

The Vision AI 2.0 system combines binocular cameras with an iToF depth sensor, enabling obstacle detection during both day and night mowing. Most robotic lawnmowers can avoid trees. The best ones recognize trampolines, lawn furniture, toys, pets and other temporary obstacles without turning them into expensive mulch.

Sunseeker claims that the enhanced vision system significantly improves this capability, making truly autonomous operation more realistic. The claim mostly holds up in reality, as this mower generally avoided things like forgotten lawn sprinklers and occasionally misplaced stones. And in my case, there are also portable chicken coops.

The transmission is another big improvement here.

Unlike many compact robotic lawnmowers that struggle with slopes once the grass gets wet, the X5 Gen 2 features all-wheel drive, rear-wheel steering, and independent suspension. It can reportedly tackle slopes of up to 60% (30 degrees), which covers most residential landscapes except ski hills masquerading as backyards. I don’t have anything like that here, but my grass is relatively high above the concrete walkways, and the X5 had no problems with that.

The floating cutting deck also deserves attention.

Instead of rigidly following the chassis, the platform floats to better follow uneven terrain. This is a simple mechanical solution that often produces better looking cuts because the blades maintain a more constant height over bumps and bumps. Electronic cutting height adjustment via smartphone app also makes seasonal changes simple. If you like that. I generally leave the grass tall to save watering and labor. The good news here is that with a robotic lawnmower, most of the work is eliminated.

Sunseeker also addresses one of the constant complaints surrounding robotic lawnmowers: edges.

No standalone mower completely eliminates the trimming task, but the X5 Gen 2 includes a dedicated micro-edge cutting system that aims to cut within about 1.2 inches (3 cm) of edges. This is significantly closer than many competitors achieve, reducing the amount of cleaning required afterwards. This has reduced my string trimmer time to just a couple of minutes compared to the half hour it used to take.

The software is quite ambitious and that is part of the problem with the learning curve of the setup.

Homeowners can create multiple mowing zones, select mowing angles to produce visible stripes on the lawn, upload custom mowing patterns, make spot cuts, and manage everything remotely via the smartphone app. Alexa and Google Assistant integration completes the connected home experience. For gadget lovers, this is almost as entertaining as watching the lawnmower silently patrol the yard. Just keep in mind that each option added means more configuration.

The noise levels are another pleasant surprise. At around 60 dB, the X5 Gen 2 is quiet enough that you probably won’t notice it unless you look outside. That opens the door to night-mowing schedules, something that would be considerably less neighbor-friendly with a traditional gas-powered lawn mower. The X5 is also audibly less noisy than my own Greenworx battery-powered mower.

The good news is that most of the X5’s problems are software problems. All the hardware is there and works very well. The software is catching up. I experienced a couple of software issues that changed the maps randomly, causing the mower to pay special attention to a part of my driveway instead of the grass next to it. I also had connectivity issues regularly, no matter where I placed the antenna or docking bay. And definitely secure that base, because the mower tends to crash into it to secure a charging connection, and that can move the bay, resulting in more map problems.

That’s probably the biggest caveat with the X5 Gen 2. It’s still new, so it’s not perfect. But the updates are quite regular and seem to be improving little by little over time. Expect this mower to perform really well before the southern hemisphere season ends.

Overall, the Sunseeker Elite X5 Gen 2 seems like a sign of where residential lawn care is headed. It combines wireless navigation, all-wheel-drive capable hardware, sophisticated vision systems, and thoughtful software features in a package that looks considerably more polished than many previous robotic lawnmowers.

It’s also reassuring that Sunseeker has focused on solving real-world annoyances rather than chasing flashy marketing buzzwords. Better cutting edge matters more than AI slogans.

Will it completely replace a traditional lawnmower for all homeowners? Probably not. Very complex landscapes with dense tree cover, elaborate gardens, or unusually challenging designs may still require occasional intervention.

For most suburban gardens, however, the X5 Gen 2 seems to strike an attractive balance between smarts, capability and convenience. If its software continues to mature at the same pace its hardware suggests, this could become one of the most attractive autonomous lawnmowers available today.

Product page: Sunseeker Elite X5