Your Most Common Questions, Answered!
Everything you need to know about solar energy
Learn About Solar
We strive to be a comprehensive knowledge base covering all aspects of solar energy. Whether you're exploring the technology, understanding costs and savings, or evaluating your home's readiness, you'll find practical answers to help guide your solar journey.
Solar panels use the photovoltaic effect to generate electricity:
- Photons from sunlight strike the solar cells
- Electrons are knocked loose from atoms in the semiconductor material
- This creates an electric current that flows through the circuit
- An inverter converts DC electricity to AC electricity for home use
- Excess energy can be stored or sent to the grid
Solar panels continue to generate electricity even in less-than-ideal conditions:
- Panels produce 10-25% of their rated capacity on cloudy days
- Diffuse light is still captured by the photovoltaic cells
- Winter months have lower output but still contribute meaningfully
- Grid connection provides backup power when needed
- Most solar systems are designed for annual productivity, not daily perfection
Net metering allows you to export excess solar energy to the grid:
- When your system produces more than you use, the excess goes to the grid
- You receive credits for this exported energy at the same rate you pay for electricity
- During night or cloudy periods, you can use these credits to pull power from the grid
- Effectively, your utility bill tracks your net usage over the billing period
- Not all areas offer net metering, so check your local utility policies
Solar panel systems have a long operational lifespan:
- Modern solar panels typically last 25-30+ years
- Most panels degrade at about 0.5% per year after year 1
- After 25 years, panels operate at 80%+ of their original efficiency
- Inverters may need replacement after 10-15 years
- The complete system provides reliable energy for decades
Battery storage provides additional benefits depending on your needs:
- Store excess daytime energy for nighttime use
- Provides backup power during grid outages
- Maximizes self-consumption of solar energy
- Can reduce demand charges in commercial settings
- Battery costs are decreasing, making them more accessible
- Can be added later if not installed initially
Solar energy provides significant environmental advantages:
- Zero greenhouse gas emissions during operation
- Reduces dependence on fossil fuel power generation
- Helps combat climate change and air pollution
- Conserves water compared to conventional power plants
- Panels are recyclable at end of life
- Supports transition to renewable energy infrastructure