Top 10 Home Solar Questions Answered

The best roof for solar faces due south, has an open sky free of heavy tree shading from 10 AM to 4 PM, and has a moderate pitch. East and West facing roofs can work but suffer a 15-20% efficiency drop. If your only viable roof plane faces North, or is heavily shaded by massive oak trees, solar will not be a financially viable investment.

This is the most misrepresented aspect of solar sales. The government does *not* send you a check for 30% of the system cost. It is a non-refundable tax credit. It simply lowers your federal income tax liability. If your system costs $30,000, you get a $9,000 credit. If you only owe $5,000 in federal taxes that year, you use $5,000 of the credit and roll the remaining $4,000 to the next year. If you are retired with zero tax liability, the credit is functionally useless.

Not if installed by professionals using specialized flashing mounts. Shoddy door-to-door companies simply drive lag bolts directly through your shingles and squirt silicon over the top (which inevitably leaks in 5 years). High-end installers use heavy-duty metal flashings, shaped like shingles, that slide under your existing asphalt shingles to create a permanent, waterproof seal before bolting the racks down.

Based on current MidAmerican and Alliant Energy rates, assuming you have a south-facing unshaded roof and can fully utilize the 30% tax credit, the break-even return on investment (ROI) is generally between 9 and 12 years. Because the lifespan of modern tier-1 panels is 25+ years, you will see a decade of pure profit once the system pays itself off.

Surprisingly, they are incredibly durable. Premium solar panels are encased in thick, tempered glass designed to withstand 1-inch hail striking the face at 50mph. In many severe Midwest hailstorms, the solar panels actually survive the impact perfectly while protecting the asphalt shingles directly beneath them from destruction.

No. And sales reps constantly lie about this. For safety reasons, standard grid-tied inverters automatically shut down the second the utility grid loses power (to prevent back-feeding electricity and electrocuting the linemen repairing the wires). The only way your panels provide power during a blackout is if you invested an extra $10,000-$15,000 in an on-site battery storage system (like a Tesla Powerwall).

When your panels produce more power than your home uses on a sunny July afternoon, the excess goes backward onto the grid. Iowa generally offers 1:1 retail net metering. This means the utility company gives you a credit for every kilowatt-hour you push to them, which you then use for free at night or during the winter when production is low.

Yes, if it is over 10-12 years old. Solar panels have a 25-30 year lifespan. If you install them on an old roof, the roofer will have to charge you $2,500+ to take the solar arrays completely off the house a few years later just so they can replace your shingles, and then charge you again to put the panels back on. Always synchronize the lifespans.

While technically possible, it is extremely expensive and often illegal depending on city zoning ordinances. To go fully off-grid, you must dramatically oversize your solar array to account for the darkest, shortest days of winter, and purchase massive banks of expensive lithium-ion batteries. It is vastly cheaper and more pragmatic to remain grid-tied.

Because solar panels are dark glass and angled toward the sun, they inherently absorb heat and melt snow quickly. Gravity does the rest. If you have micro-inverters, the exposed panels will produce power even if part of the array is covered. Unless it's a massive blizzard, it's generally best to just let the sun melt it rather than risk damaging the glass by hitting it with a heavy roof rake.