- +86 13382288446
- willa@jysolarpanel.com
- +86 13382288446
Your Trusted Solar Panel Supplier in China
★ Large Stock of Tier 1 Solar Panels
★ 2%-3% Below Market Rate
★ Fastest Delivery in 3 Working Days
Hot-selling PV Panels
Why Choose Us as Your Solar Supplier?
Multi-Brand Sourcing
High-performance solar modules from Jinko, Longi, Trina, JA, Canadian Solar, etc., available in various sizes.
W/H Audit Support
Welcome to inspect your solar panel order before shipping. On-site or video inspection options available.
Low Wholesale Price
Cost-optimized solar products for bulk orders. 2-3% Off Market Rate. Reinvest Saved Budget in Extra Panels.
Flexible MOQ
Start your first order with just 1 pallet (perfect for trial orders or small orders) or 1 full 20HQ container.
Fast Delivery Service
Self-owned warehouses stocked with 80K+ ready-to-ship solar modules. Fastest delivery in 3 working days.
Quality Assurance
Quality guarantee documents, such as an IEC test report, can be provided based on different product types.
Suitable for Different Solar PV Applications
Utility-scale
Commercial & Industrial
Residential
Solar PV FAQs
What is the lifespan of a solar panel?
Most solar panels last 25 to 30 years with minimal degradation in performance. High-quality brands like Jinko and LONGi ensure durability and long-term energy production.
What is the conversion efficiency of solar panels?
The conversion efficiency of modern solar panels ranges from 18% to 23%, depending on the technology. Top-tier panels from brands like LONGi and Jinko Solar often lead in efficiency.
Can solar panels work without sun?
Yes, solar panels still generate electricity on cloudy days or in indirect sunlight, though at reduced output. They do not work at night without energy storage like batteries.
What is the panel efficiency on a cloudy day?
On cloudy days, solar panel output drops to about 10%–25% of peak performance, depending on cloud density and panel quality. High-efficiency panels like those from LONGi or Jinko perform better under low-light conditions.
How many solar panels do l need?
The number of solar panels you need depends on your energy consumption, location, and panel wattage. On average, a 5kW system requires around 9 panels rated at 550W each.
What are the different types of solar panels?
There are three main types: monocrystalline, polycrystalline, and thin-film. Monocrystalline panels offer highest efficiency and sleek design, ideal for rooftops and residential use.
Which is better, Jinko or Longi Solar?
Both Jinko and LONGi are top-tier solar panel manufacturers. LONGi is known for high-efficiency monocrystalline technology, while Jinko offers excellent value and performance. The best choice depends on your specific project needs.
Which is better, single glass or double glass solar panels?
Bifacial (double glass) solar panels can produce up to 30% more energy by capturing sunlight from both sides. They are ideal for commercial projects or high-reflective surfaces, while monofacial panels are more common in residential settings.
Looking for cost-effective solar panels?
Tell us the brand, wattage, and quantity you need. The more details you provide, the more accurately we can assist you.
You can contact us in any way that is convenient for you. We are available 24/7 via WhatsApp, email, or telephone.