Greenhouse Robots for Crop Monitoring

Overcoming Charging Bottlenecks in Greenhouse Automation

As autonomous farming robots take on increasing responsibilities in greenhouse automation - including monitoring, harvesting, logistics, and feeding - reliable and continuous power supply becomes mission‑critical.

FRAVEBOT, a leading provider of autonomous crop‑monitoring robots for fruit yield forecasting and pest and disease detection, faced a major challenge with their existing charging method. Their robot fleet depended on manual plug‑in charging, and centralized charging stations created operational bottlenecks and unnecessary downtime. Robots frequently needed to travel long distances only to recharge, reducing productivity.

Additionally, harsh greenhouse conditions—high humidity, dust, and water exposure—often caused premature failure of conventional connectors and non‑outdoor‑rated charging systems, increasing maintenance requirements and reducing availability.

The Need for 100% Autonomous Robot Charging

FRAVEBOT required a scalable, maintenance‑free, and fully autonomous charging solution capable of keeping their robot fleet continuously powered. The goal was to eliminate downtime associated with manual charging and enable true “hands‑off” operation across the entire greenhouse.

Key requirements included:

• Contactless, wear‑free charging with high efficiency
• Reliable charging despite pad misalignment or soiled surfaces
• Rugged, outdoor‑rated hardware for wet and humid environments
• Seamless integration into existing greenhouse pathways
• Opportunity charging to eliminate idle time and maximize uptime

WirelessCharger 3.0 - The Scalable Charging Solution for Autonomous Robot Fleets

To solve these challenges, FRAVEBOT integrated Conductix-Wampfler’s WirelessCharger 3.0, an advanced inductive charging system engineered for high‑throughput and demanding outdoor or greenhouse applications.

The system provides contactless power transfer with up to 93% efficiency and ensures reliable charging even when the IP65 rated charging pads are misaligned or contaminated. With charging pads rated up to IP69K, the technology performs consistently in wet, dusty, or heavily soiled conditions while delivering the required power for FRAVEBOT’s 48 V, 196 Ah (9.4 kWh) battery packs.

To enable decentralized power distribution, the IP54‑rated charging station (wallbox) was installed directly along greenhouse rows. Following the “100‑Row Rule,” each robot remains within range of a charging pad, eliminating long travel times to centralized stations.

At the fleet‑management level, FRAVEBOT transitioned from a run‑to‑empty strategy to an opportunity charging model. Robots now autonomously dock during brief idle moments to maintain a state of charge (SoC) between 70% and 90%, minimizing deep discharge cycles and ensuring the entire fleet remains consistently available.