WYBOT S2 Solar Review (2026): Is Solar Charging Actually Worth $1,800?

Quick Answer: The WYBOT S2 Solar is WYBOT’s flagship cordless robotic pool cleaner, built around a solar-charging dock so it theoretically never needs to be plugged in. It carries a $1,799.99 MSRP, covers pools up to 3,229 sq ft, and runs 2.5+ hours per cycle on a 5,200 mAh battery, per WYBOT’s own specs. But PCWorld’s independent review found the battery undersized for full cleaning cycles and measured roughly 2.5 days to recharge from 19% to 100% using solar alone — even in peak Texas summer sun — concluding most buyers will end up plugging it in almost as often as a standard cordless robot anyway.

WYBOT calls the S2 Solar the “world’s first underwater solar-powered robot pool cleaner,” and the pitch is genuinely appealing: drop it in, let it live on a floating dock, and never think about charging again. The reality, per independent testing, is more complicated. Here’s what the solar charging actually delivers, where it falls short of the pitch, and who should still buy it.

WYBOT S2 Solar at a glance

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By the numbers

• Solar recharge time: PCWorld measured roughly 2.5 days to go from 19% to 100% charge using the solar dock alone, during a Texas summer with strong, consistent sun — far slower than the plug-and-wait experience of a standard cordless charger.
• Battery capacity: 5,200 mAh in the robot itself, with a 2,600 mAh buffer in the docking station, per PCWorld’s teardown of the spec sheet.
• Coverage: WYBOT rates the S2 Solar for pools up to 3,229 sq ft (about 300 m²) — the largest coverage figure across WYBOT’s cordless lineup.
• Price: $1,799.99 MSRP direct from WYBOT, with PCWorld reporting closer to $1,800 with a coupon applied — a premium of roughly $700 over the camera-equipped WYBOT C2 Vision (~$1,069 list).

What it does well

Genuinely strong wall and waterline cleaning. PCWorld’s review specifically praised cleaning performance on pool walls and at the waterline — the areas where cheaper floor-only robots typically struggle.

No cord to manage, ever. Unlike corded robots that need a pump connection, the S2 Solar is fully cordless and its dock lives on the pool wall, so there’s no cable to store or untangle between cleans.

Largest coverage rating in WYBOT’s lineup. At 3,229 sq ft, it’s rated for meaningfully bigger pools than the C2 Vision (2,152 sq ft) or C1 (1,615 sq ft).

Backup DC charging built in. WYBOT doesn’t force an all-or-nothing bet on solar — you can plug the dock in directly when you need a fast, reliable charge.

Where it falls short

• The solar charging doesn’t deliver the promised convenience. PCWorld’s headline finding: 2.5 days to recharge from 19% to 100% using solar alone, even in ideal summer conditions — nowhere near fast enough to keep up with regular cleaning cycles.
• The battery is undersized for the coverage it’s rated for. PCWorld found the robot sometimes couldn’t complete a full cleaning pass on a large pool before running low, undercutting the 3,229 sq ft coverage claim in practice.
• App connectivity issues. The reviewer reported frequent app disconnects, a recurring complaint across several WYBOT models on this site.
• You’ll likely still be visiting the pool often. PCWorld’s own conclusion: between retrieving a wayward robot, emptying the filter basket, and waiting out slow solar recharges, they found themselves “trekking out to the pool nearly as much” as with a standard plug-in cordless robot — undermining the core hands-off pitch.
• Steep price for the tradeoffs. At $1,799.99, it costs roughly $700 more than the well-reviewed WYBOT C2 Vision while trading away that model’s AI camera navigation.

WYBOT S2 Solar vs the alternatives

Against the WYBOT C2 Vision, the S2 Solar covers more square footage and drops the cord entirely, but it costs about $700 more while trading away the AI camera that makes the C2 Vision our top overall WYBOT pick. Against premium rivals like the Beatbot AquaSense 2 Ultra, the pattern repeats: an ambitious hands-off pitch (self-cleaning dock there, solar charging here) that independent reviewers found didn’t fully deliver at a price near or above $2,000. For most large-pool owners, the plug-in WYBOT C2 Vision or the budget Aiper Scuba S1 will clean just as well for meaningfully less money and less waiting around for sunlight — see our full best WYBOT pool cleaner guide for the rest of the lineup.

Who should buy the WYBOT S2 Solar

Buy it if you have a large pool (up to 3,229 sq ft), genuinely never want to unplug and replug a charging cable, and are willing to pay a premium for that convenience even knowing the solar charging alone won’t keep pace with regular use — you’ll want the DC backup charging as your real plan.

Skip it if you’re pool-charging convenience-focused on a budget: the WYBOT C2 Vision costs $700 less and cleans just as well with a standard 3-hour plug-in charge, and the Aiper Scuba S1 delivers proven floor-wall-waterline cleaning for a third of the price. See our best cordless robotic pool cleaner guide for the full field.

The bottom line

The WYBOT S2 Solar is an ambitious idea — a genuinely cordless, self-charging robot for large pools — that doesn’t fully deliver on its own premise. PCWorld’s independent test found the solar recharge too slow and the battery too small for the coverage WYBOT advertises, concluding most owners will end up plugging it in nearly as often as any other cordless robot. At $1,799.99, you’re mostly paying for the idea of solar convenience rather than proven, reliable hands-off cleaning. Unless you have a large pool and are set on avoiding cords at any cost, the WYBOT C2 Vision or Aiper Scuba S1 will clean just as well for considerably less money.