The maths is simple: the upper the tonnage, the greater solar power you need to generate. If you have an existing solar array, you'll need to increase added panels to energy up a further AC unit. The general Expense will depend upon the caliber of the panels. Great to understand: https://offgridsolarairconditione89011.full-design.com/off-grid-solar-air-conditioners-canberra-things-to-know-before-you-buy-77914059