Q1: Will installing solar panels affect the service life of the roof?

If installed in compliance with standard specifications, solar panels will not shorten the roof lifespan; on the contrary, they can protect the roof and extend its service life.

Many people worry that mounting solar panels on the roof will damage the waterproof layer. In fact, professional installation teams will first inspect the roof condition and complete professional waterproofing work. For instance, waterproof gaskets and sealant will be applied where PV brackets contact the roof to prevent rainwater infiltration. Meanwhile, the panels block direct sunlight and heavy rain erosion, reducing the risk of roof aging and cracking.

A key reminder: Always choose qualified and experienced installation teams, and avoid unregulated small workshops. Unprofessional constructors may skip waterproofing procedures and use low-quality PV brackets, resulting in insecurely installed panels that are prone to falling off. This not only damages the roof lifespan but also poses serious safety hazards.

Q2: Is routine maintenance troublesome? How much does it cost?

Maintenance is extremely simple, requiring almost no extra time or cost — ideal for low-effort upkeep.

Daily maintenance mainly involves cleaning the solar panels. Rainfall can handle most cleaning work naturally. Manual cleaning only needs to be done 1 to 2 times a year (more frequently in dusty areas if needed). You can simply rinse the panels with clean water yourself, with no need for professional staff or extra expenses.

In addition, formal PV modules and inverters come with a 5 to 25-year warranty. Any faults within the warranty period will be repaired or replaced free of charge by the manufacturer, with no cost borne by the homeowner. Even after the warranty expires, the PV system has a very low failure rate. Minor occasional repairs cost little, making the annual maintenance cost almost negligible.

Q3: Can electricity generated by solar panels be used directly? Will unstable power damage home appliances?

It cannot be used directly. However, after conversion by an inverter, the power supply remains stable and harmless to home appliances, just as safe as conventional grid electricity.

Solar panels generate direct current (DC), while household appliances run on alternating current (AC). An inverter — the core device of the PV system — converts DC into AC. The converted voltage and frequency match standard grid power, ensuring stable operation without voltage fluctuations that could damage appliances.

Moreover, solar panels are fixed on the roof with PV dedicated brackets. Professional installers select suitable brackets according to roof type (flat or sloped) to firmly secure the panels and adjust the installation angle optimally for maximum sunlight absorption. Matched with waterproof gaskets, the brackets work with panels and inverters to ensure stable system operation, further preventing power instability caused by loose equipment or improper installation angles.

Most residential PV systems adopt the mode of self-consumption with surplus electricity fed to the grid. When solar power generation is insufficient (on cloudy days or at night), the system automatically switches to grid power supply, with no power cuts or voltage instability, and zero impact on daily household electricity use.