The Furrion Chill Cube air distribution box itself consumes minimal power; most energy use comes from the rooftop AC unit it supports. Typical rooftop RV AC units, including Furrion models, require 120V AC and draw approximately 1,200 to 1,500 watts during operation, with startup surges reaching 1,500 to 2,000 watts. Your Victron Multiplus II 3000 inverter, rated for about 2,400 watts continuous output at 120V, can handle the AC's power needs. The dual LifeBlue 12V 200AH batteries provide roughly 4,800 watt-hours of usable energy, enabling approximately three hours of AC run time under ideal conditions, although inverter losses and other loads may reduce this. Your 800-watt solar array will help recharge the batteries but likely cannot sustain continuous AC operation, especially in less-than-optimal sunlight. For improved performance and reduced startup current, consider adding a soft start device to your AC system. Overall, your current setup can support running the Furrion Chill Cube AC for short periods during boondocking, but long-term continuous use would require additional power resources.