Driven by the “dual carbon” goal, photovoltaic building integration (BIPV) is becoming an important track for green transformation. However, the operation cycle of photovoltaic systems for more than 25 years has put forward severe tests on the weather resistance, waterproofness and stability of roof materials.
The pain points of traditional roofing materials, which are easy to age and leak, have become the “invisible killer” that restricts the long-term benefits of photovoltaic projects. However, the performance advantages of Himei waterproof tiles, which are highly compatible with photovoltaic systems, are reshaping industry standards!
The “invisible threshold” of photovoltaic roofs: Why are ordinary materials difficult to take on the task?
Photovoltaic modules need to generate electricity continuously for 20-30 years, but many roofing materials are “aging prematurely”:
High temperature exposure: The roof temperature exceeds 80℃ in summer, which accelerates the aging of asphalt rolls and the shedding of steel plate coatings;
Temperature difference deformation: The temperature difference between winter and summer causes the material to shrink and crack, destroying the integrity of the waterproof layer;
Load pressure: The weight of photovoltaic brackets + modules tests the bearing capacity of the roof, and traditional tiles are prone to brittle cracking;
Leakage risk: Drilling and installation damage the waterproof layer, and the subsequent maintenance cost is high.
These hidden dangers may affect the power generation efficiency at the least, or cause roof leakage, structural damage, and even threaten the safety of photovoltaic equipment at the worst. Choosing the right roofing material is the first line of defense for reducing costs and increasing efficiency throughout the life cycle of photovoltaic projects!
Himei waterproof tiles: “hexagonal warriors” tailored for photovoltaic systems
Himei waterproof tiles, an innovative composite of TPO (thermoplastic polyolefin) waterproof membranes and metal steel plates, combine the flexibility of polymer materials with the strength of metals to create the “golden base” of photovoltaic systems.
1. Super long weather resistance, resonating with photovoltaics
TPO has a stable molecular structure, is resistant to ultraviolet rays, ozone, and acid and alkali corrosion, and its performance does not decay at extreme temperatures from -40℃ to 120℃. Its lifespan is up to 30 years+, which perfectly matches the lifespan of photovoltaic modules;
The steel plate is added with a high barrier anti-corrosion layer, and its corrosion resistance is 6 times that of ordinary roof tiles, eliminating rust perforation.
2. No leakage, protect the safety of the roof
The roof layer welded into a whole achieves the waterproof effect of “water storage and no leakage” to resist strong winds and rainstorms;
After the photovoltaic bracket is fixed with self-tapping screws, the matching TPO waterproof gasket is welded and sealed, and there is no leakage point on the entire roof, eliminating the hidden danger of leakage.
3. Reflection cooling, improve power generation efficiency
The surface of the light-colored waterproof tile can reflect more than 80% of solar radiation, reduce the roof temperature by 5-8℃, reduce the heat loss of photovoltaic components, and increase the power generation efficiency by 3%-5%.
4. Quick installation, worry-free throughout the life cycle
After the roof is damaged, it only needs to be repaired by welding a layer of TPO on the roof. It is maintenance-free design and does not require renovation for 30 years, saving operation and maintenance costs.
The surface of the light-colored waterproof tile can reflect more than 80% of solar radiation, reduce the roof temperature by 5-8℃, reduce the heat loss of photovoltaic components, and increase the power generation efficiency by 3%-5%.
5. Heat insulation and cooling, improving the efficiency of photovoltaic systems
When photovoltaic panels absorb solar energy to generate electricity, they will generate a higher surface temperature. Haimei waterproof tiles have a heat insulation effect. Through TPO, heat is blocked from transmitting to the roof, which can reduce the temperature of the back of the photovoltaic panel by 5-15℃, and it is expected to bring 3%-8% power generation efficiency;
The upper photovoltaic power generation, the lower waterproof tiles block heat, which can reduce the room temperature of the top floor of the building by 3-5℃ and reduce air conditioning energy consumption by 15%-25%.
6. Matching flame-retardant PVC waterproof membrane, safety guarantee
The photovoltaic system is prone to fire hazards caused by electric arcs. In addition to TPO membranes, Himei waterproof tiles can also be matched with PVC waterproof membranes. It uses a composite flame-retardant formula to reduce the combustion reaction by endothermic decomposition when encountering high temperatures, and at the same time forms a dense carbonized layer to isolate oxygen and effectively block the spread of flames;
It meets the GB8624 B1 standard to ensure that the material has self-extinguishing properties under open flames, greatly delaying the spread of fire and gaining critical time for emergency disposal.
The roof is the fifth facade of the building and a “strategic high ground” for green energy. The “ultra-long standby combination” of Himei waterproof tiles and photovoltaic systems not only locks in long-term returns for investors, but also makes every inch of the roof a practitioner of the “dual carbon” goal.