Ecostella offers a range of energy-efficient packages and products aimed at controlling HVAC systems to improve efficiency by 10-30%. Their offerings include Stella Efficiency, Stella Trio, Stella's Essentials, Stella Pro, Stella Elite, and Stella Power Pack packages with varying features and prices. Additionally, Ecostella provides custom packages with products like Honeywell Smart Thermostats, SynCat360, Emporia Gen Home Energy Monitors, HVAC system tune-ups, insulation services, and more. The company's technology is designed to save homeowners money on energy bills, with the potential to pay for itself in approximately 12 months or less.