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Most solar panels experience a degradation rate of about 0.5% to 1% per year. This means that after 25 years, a panel that started with 20% efficiency might still operate at 15% to 17.5% efficiency, depending on conditions. The degradation is seldom linear; it often sharpens in the later stages of a panel's life. It's essential for potential solar panel owners to consider these factors when evaluating their investment.

There are two main types of solar panels: PV and thermal. Photovoltaic solar panels (PV) are the most commonly used type, as they harness the sun's energy and convert it into electricity. These panels enable you to power your home's appliances. The other type of panel is solar thermal, which heats water for your home. Most homes install solar PV as we tend to use a lot more electricity, making it the most efficient way to reduce energy bills.

The production of solar technology has its environmental downsides, as the mining of materials and manufacturing of solar panels creates a considerable amount of greenhouse gas. The Office of Energy Efficiency & Renewable Energy issued a report revealing that solar panels pay for themselves in terms of greenhouse gas emissions within one to four years of use, so while certainly still a downside, much of the issue can be mitigated.

Another challenge is the need for proper system sizing and planning. Homeowners must accurately assess their energy needs to determine the number of solar panels and the capacity of the battery storage required. This process can involve a steep learning curve, and potential users are encouraged to seek guidance from professionals or consult reliable resources to optimize their systems.