Solar in Alaska has to live on a roof built for cold first. Heavy snow load, ice at the eave, and wind off Cook Inlet are what the mounts have to survive. Long dark winters leave an array buried and quiet. Long summer daylight is the other half of the year and does not answer the real questions. Those questions are the roof, the structure, and who you call when the equipment goes silent.
Do not set an array on a covering that dams, leaks, or is tired. The roof has to carry the array and the snow together. Ask how the feet are flashed and what happens when the covering is replaced later. Feet that block an eave already prone to ice are a bad trade. A picture from the air has not stood on a snowy deck. Someone has to.
Ask who owns the panels, and ask who gets called when an inverter goes quiet. In the dark months that quiet may be snow and night, or it may be a failed unit, and someone has to tell those apart. Put the gear where it can be reached in winter, not in a locked crawl under a drift. Shade from spruce and birch still counts.
Earthquakes are a standing concern. Rails and fasteners are a structural question on this coast. If a roof repair or a claim is open, finish the covering before any attachment. The short building season will not stretch to excuse the wrong order. Say whether the electrical service can take the equipment. A small, full panel in an older house is a fact to lead with, not a surprise on install day.
Say the town, the age of the roof, and whether snow, ice, or shade is the limit. Say who owns the panels if you know. Say that you need a name to call when the inverter stays quiet if you do not. If the covering is tired, start there. Call the number on this page.