Solar in Maryland starts on the roof and the sky around it, not on a promise about the utility. The array only works if the covering underneath is sound, the structure can carry the load, and the sun actually reaches that slope for enough of the day. Western valleys lose hours to ridges. Piedmont lots lose sun to mature hardwoods. Say which landscape the house sits in before anyone talks about equipment.
Direction and shade decide the day. A south slope with an open afternoon is a different roof from a north slope under oaks. In-town blocks throw shade from a taller neighbor even when your own yard is small. Detached houses often have more roof choices and more tree cover at the same time. Dormers, chimneys, vents, and a cramped hip roof all break up the clear area. Describe the roof you have, including the slopes you think face the sun.
Do not plan an array for a roof that already leaks or is near the end of the covering. Each attachment has to stay weather-tight through western ice and through wind-driven rain on the Shore. If the shingles, metal, or slate need work first, that comes before any rack goes down. Say the age of the roof if you know it, the material, and whether the attic shows stains or a soft deck. A clean satellite view cannot see a damp board or a tired flashing boot.
The electrical service is the other half of the site. An older panel, a crowded cabinet, and a long path from the roof to the meter change the work. The utility still has to accept the interconnection before the system runs. Ask, when you call, who handles that step, and say whether the house has a straightforward residential service or something more crowded.
Have a plain description ready: the county, the direction of the roof, shade from trees or neighboring buildings, and the condition of the covering you want to use. Solar in Maryland is a site question about sun, salt, shade, and the deck under the panels. The mountains, the Piedmont, and the Shore do not offer the same day of light. Call the number on this page.