The size of a 300 watt solar panel is engineered for optimal balance between power output and space efficiency, making it an ideal choice for a wide range of industrial and commercial applications. Measuring approximately 1675 mm x 1002 mm x 35 mm, this monocrystalline photovoltaic (PV) module delivers 300W of reliable clean energy while fitting seamlessly into constrained installations. As a leading supplier in international trade, we understand that the precise dimensions of solar panels directly impact project feasibility, roof load calculations, and system scalability.
Our 300W solar panel stands out in the competitive solar market due to its high-efficiency PERC (Passivated Emitter and Rear Cell) technology, which achieves up to 19.5% module efficiency. This means more power generation per square meter, crucial when considering the size of a 300 watt solar panel in diverse environments—from urban rooftops to remote off-grid sites. Built with premium tempered glass and anodized aluminum framing, it withstands harsh weather conditions, including high winds up to 2400 Pa and snow loads up to 5400 Pa. Whether you're outfitting large-scale solar farms or supplementing industrial power needs, understanding the size of a 300 watt solar panel ensures precise integration into your energy strategy.
With a focus on sustainability and cost-effectiveness, this panel reduces long-term energy expenses by harnessing abundant sunlight efficiently. Its compact footprint minimizes transportation and installation costs, aligning perfectly with B2B buyers seeking scalable renewable solutions. Explore how the standard size of a 300 watt solar panel can transform your operations today.
| Parameter | Value |
|---|---|
| Peak Power (Pmax) | 300 W |
| Size of a 300 Watt Solar Panel (L x W x H) | 1675 mm x 1002 mm x 35 mm |
| Weight | 19.5 kg |
| Cell Type | Monocrystalline PERC, 60 cells (6 x 10) |
| Module Efficiency | 17.9% - 19.5% |
| Maximum System Voltage | 1000 V DC |
| Operating Temperature | -40°C to +85°C |
| Wind Load / Snow Load | 2400 Pa / 5400 Pa |
| Junction Box | IP68 rated, 3 diodes |
| Cable | 4 mm², 1200 mm length (customizable) |
| Connectors | MC4 compatible |
| STC Conditions | Irradiance 1000 W/m², Temperature 25°C, AM 1.5 |
| Temperature Coefficient (Pmax) | -0.37%/°C |
| NOCT | 45 ± 2°C |
Note: Specifications are subject to minor variations based on manufacturing tolerances. The size of a 300 watt solar panel is standardized for compatibility with most racking systems.
The versatile size of a 300 watt solar panel makes it suitable for numerous B2B deployment scenarios, where space optimization and high output are paramount.

In each case, the precise size of a 300 watt solar panel facilitates rapid ROI through reduced balancing costs and enhanced energy yield.
Choosing our 300W solar panel offers distinct advantages over generic alternatives, particularly in terms of the thoughtfully designed size of a 300 watt solar panel.
These advantages position our product as a premium yet economical choice for discerning international buyers focused on the practical size of a 300 watt solar panel.
As a Tier 1 manufacturer with 15+ years in solar PV production, we deliver unmatched quality and service for every 300W solar panel order. Our state-of-the-art facilities produce over 2 GW annually, adhering to the world's strictest quality controls. We prioritize transparency in specifications, including the exact size of a 300 watt solar panel, to eliminate deployment uncertainties.
Our global supply chain ensures competitive pricing, flexible MOQs, and rapid lead times—typically 7-15 days for container loads. Backed by ISO 9001, ISO 14001, and OHSAS 18001 certifications, we provide full lifecycle support: from customized framing options to post-installation monitoring tools. Partner with us for panels that exceed expectations in performance, reliability, and the optimized size of a 300 watt solar panel tailored to your projects.
What is the exact size of a 300 watt solar panel?
The standard size of a 300 watt solar panel from our lineup is 1675 mm in length, 1002 mm in width, and 35 mm in thickness, providing an optimal balance of power and portability.
How does the size of a 300 watt solar panel compare to higher wattage models?
Compared to 400W+ panels, our 300W model has a more compact footprint (about 20% smaller), making it preferable for space-limited applications while maintaining high efficiency.
Is this panel suitable for high-wind areas?
Yes, certified for 2400 Pa wind loads, the robust frame and size of a 300 watt solar panel ensure stability in typhoon-prone regions.
What warranty covers the size of a 300 watt solar panel?
25-year linear power output warranty, plus 12-year product workmanship warranty, guaranteeing dimensional integrity and performance over decades.
Can the size of a 300 watt solar panel be customized?
Standard sizes are optimized for compatibility, but custom dimensions are available for large-volume orders upon engineering consultation.
How many panels fit on a standard 20-foot container?
Approximately 390 pieces, thanks to the efficient packing enabled by the size of a 300 watt solar panel.