
Compact bipedal humanoid, about 880 mm and 13 kg, with 21 active degrees of freedom, a two-finger end effector, and depth and 3D range sensing.
Request a quote →Request a QuoteThe STTBOT-S1 is the compact member of SOLARTODO's STTBOT family of bipedal ground robots. It stands approximately 880 mm tall and weighs approximately 13 kg with its battery. It walks on two legs, uses depth and 3D range sensing for local awareness, and returns to its own 200 W wireless charging position between tasks.
SOLARTODO builds the STTBOT robots for ground inspection, ground-level follow-up on events spotted from the air, remote observation and light service tasks, as part of its SKYHUB air–ground system. The S1 is sold separately, so you can order it on its own, without the drone and hangar.
The manual positions the S1's compact height for lower access points. Its outside width and depth aren't published; they come with the record for the supplied unit, as do the battery capacity and the fitted tool.
| Specification | STTBOT-S1 | Page |
|---|---|---|
| Standing height | Approximately 880 mm | p.58 |
| Mass, battery included | Approximately 13 kg | p.58 |
| Standing width × depth | Not published; recorded for each supplied unit | pp.58, 61 |
| Active degrees of freedom | 21 in the base configuration: 6 per leg, 4 per arm, 1 waist yaw | pp.58, 63 |
| Single-arm load | Approximately 2 kg, a model capability at a permitted posture, including the fitted tool and grasped item | pp.58, 59, 61, 64 |
| Arm reach | 300–400 mm effective reach, including the two-finger end effector | p.58 |
| End effector | Two-finger | p.58 |
| Locomotion | Bipedal walking, standing, squatting and configured dynamic motions | pp.58, 61 |
| Battery | 48 V nominal quick-release smart battery; capacity set by the purchased configuration (not published) | pp.58, 65 |
| Operating time | Not published; depends on the supplied battery, compute mode and task load | p.58 |
| Wireless charging | 200 W contactless module (transfer rating; actual charging power depends on alignment, configuration and the BMS) | pp.64–65 |
| Audio | Ring microphone array and speaker integration available | p.59 |
| Onboard compute | 16 GB edge AI compute platform | p.59 |
| Depth sensing | Active-infrared stereo depth; recommended working range approximately 0.26–3 m | p.59 |
| 3D range sensing | 360° horizontal view; approximately 40 m on a 10% reflectivity target | p.60 |
| Connectivity | Wi-Fi 6, Bluetooth 5.2, Ethernet and USB | p.60 |
| Software | SDK, motion control and ROS/ROS 2 integration, according to the supplied configuration and authorized access | p.60 |
Specifications verified 2026-10-11 against SOLARTODO's STTBOT-S1 model page (catalogue specification Rev 1.3, 2026-09-27) and the SKYHUB Air–Ground Complete Product Manual, English customer edition, Rev 1.3 (27 September 2026), at the pages listed. Figures describe the catalogue configuration; the supplied unit's record governs.
Permitted load depends on reach, posture and the approved task profile; these figures are not a guaranteed payload while walking.
Sensor ranges describe the installed sensing assemblies, not guaranteed whole-robot detection or obstacle-clearance performance; task performance depends on the configured model, scene and route.
Both STTBOT models use a 200 W contactless transmitter and receiver. That 200 W is the wireless transfer rating. The power that actually reaches the battery can be lower, because of alignment, transfer loss, battery temperature and the battery-management system's charge profile. Suggested operating gap 5–15 mm, preferably 8–10 mm; lateral alignment approximately ±10 mm, subject to dock geometry and the supplied configuration (manual pp.64–65).
The S1's battery capacity is part of the configuration you buy, and SOLARTODO doesn't publish an S1 charge time, so ask for the charge figures for your configuration with your quote.
SOLARTODO LIMITED manufactures the STTBOT-S1 and supplies it from Yangzhou, Jiangsu, China. Availability, shipping and destination compliance are confirmed per order. The supplied unit's configuration sets the fitted tool, the battery and the permitted task profile.
US buyers: No US import approval is claimed for this model. US import, equipment-authorization and other destination requirements must be checked for the exact supplied configuration before an order is accepted.
The STTBOT-S1 is priced on request. Request a quote with your destination country, quantity and intended tasks. BotInfo.ai reviews each request and introduces qualified buyers to the manufacturer, which quotes, sells and ships in its own name.
The S1 is the compact model. The STTBOT-T1 stands 1,320 mm tall, weighs approximately 35 kg with its battery and has 23 active degrees of freedom. SOLARTODO notes that the S1's arm reach and the T1's arm span use different measurement definitions, so they shouldn't be compared directly. Each model is sold separately.

Treat the S1 as a configurable site robot from a smart-infrastructure maker, not an off-the-shelf research humanoid. Its strength is the documentation: SOLARTODO's manual separates what's specified from what's recorded per unit, and it says plainly that 200 W is a transfer rating, not a charge time. Battery capacity and outside dimensions are configuration-specific; operating time depends on the supplied battery, compute mode and task load. Ask for your configuration's battery capacity and outside dimensions with your quote before you plan a route or a dock.
The STTBOT-S1 is priced on request. The price depends on the configuration, including the battery and fitted tool, and on your destination. Request a quote through BotInfo.ai for current pricing.
Approximately 880 mm tall and approximately 13 kg with its battery, per SOLARTODO's Rev 1.3 manual. Its standing width and depth are recorded for each supplied unit rather than published.
21 active degrees of freedom in the base configuration: 12 in the legs, 8 in the arms and 1 at the waist.
SOLARTODO doesn't publish an S1 charge time. Its contactless module is rated for 200 W of wireless transfer, and actual charging power can be lower, depending on alignment, configuration and the battery-management system. Battery capacity depends on the configuration you buy, so ask for charge figures with your quote.
Yes. SOLARTODO sells the STTBOT-S1 separately.
No US import approval is claimed for this model. US import, equipment-authorization and other destination requirements must be checked for the exact supplied configuration before an order is accepted.
Yangzhou, Jiangsu, China. Availability, shipping and destination compliance are confirmed per order.
SOLARTODO LIMITED, based in Yangzhou, Jiangsu, China, manufactures both STTBOT models.