At Busworld 2025 in Brussels, Spheros will debut its latest innovation – the REVO®-E R290, a fully electric rooftop air conditioning unit using the natural refrigerant R290. The unit marks a major step forward in sustainable thermal management for buses.
REVO®-E Series: One System, Every Climate, Any E-Bus
The REVO®-E family includes three fully electric rooftop units – REVO®-E R290, REVO®-E HP R744, and REVO®-E Global – tailored for various climates and bus types. These systems use natural refrigerants (R290/R744) and are interface-compatible, offering OEMs compliance with F-Gas and PFAS regulations while ensuring long-term operational flexibility.
REVO®-E R290: Sustainable, Safe, Scalable
Designed for all bus sizes and extreme climates, the REVO®-E R290 supports add-ons like heat pump, battery/component cooling, and heat recovery. It will enter series production in Q4 2026, backed by a certified safety architecture.
REVO®-E HP R744: Now for Coaches Too
Launched in 2021, the R744 version is now optimized for coaches in moderate climates. With a low-profile design and optional battery cooling, it ensures efficient heating and cooling with minimal energy use.
REVO®-E Global: Next-Gen Efficiency
Built on a decade of global experience, the second-gen REVO®-E Global offers 20% higher efficiency and 10% more cooling than its predecessor. A modular design and optional battery thermal management make it suitable for diverse applications worldwide.
E-Cooler 100 BTM: Standalone Battery Cooling
The latest E-Cooler 100 BTM delivers 10 kW cooling capacity for electric and hybrid buses. With both active/passive cooling, integrated heating, and a central pump, it offers a compact all-in-one thermal management solution now in series production.