Yes, you can often add more panels to your existing system, though it depends on several factors including available roof space, electrical capacity, and local utility interconnection limits. It's generally more cost-effective to size your system appropriately from the start, but expansion is possible if your energy needs change or you want to add an electric vehicle.

While DIY solar kits are available, professional installation is highly recommended for safety, warranty, and performance reasons. Solar installation involves electrical work, roof modifications, and local permitting requirements. Most manufacturers require professional installation to maintain warranties, and many jurisdictions require licensed electricians for the electrical connections.

Solar panels are built to withstand harsh weather conditions, including high winds (up to 140 mph), hail, and temperature extremes. They're tested to meet strict durability standards and actually perform more efficiently in cooler temperatures. Snow typically slides off panels easily, and light snow cover usually melts quickly due to the panels' dark surface.

Standard grid-tied solar systems automatically shut off during power outages for safety reasons, even if the sun is shining. To have power during outages, you need a battery backup system or a special inverter with backup capabilities that can power essential circuits while disconnected from the grid.

A typical residential solar installation requires 300-600 square feet of roof space, depending on your energy needs and panel efficiency. Generally, you need about 100 square feet per kilowatt of solar capacity. For an average 6kW system, expect to use around 400-500 square feet of south-facing roof area.