What a useful Calgary solar proposal should show
A homeowner should be able to see the system size in kW DC, panel quantity, panel manufacturer and model, panel wattage, inverter or microinverter model, expected annual production, installed price and the assumptions used to size the system.
If battery storage is offered, its usable kWh and power output should be shown separately. If roof replacement or repair is needed first, that should be separated from the solar scope instead of buried in one number.
Why the cheapest total price is not always the cheapest solar system
Two proposals can have similar totals while using different system sizes or equipment. Dividing installed price by DC watts is a cleaner first comparison, but it still does not replace checking the actual equipment, warranties, electrical scope and expected production.
That is also why Trusted's instant result is a planning range. The detailed proposal is where actual usage, equipment and final design replace the early assumptions.