The Solar Step
620W Longi Bi-Facial Tier 1 Hi-MO Solar Panel
620W Longi Bi-Facial Tier 1 Hi-MO Solar Panel
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33 in stock
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PLEASE NOTE THAT SOLAR PANELS ARE COURIERED AT OWN RISK !!
Description
Utility-Scale Solar Module for Maximum Energy Yield
The LONGi 620W Bi-facial Hi-MO 7 Solar Panel is a high-output photovoltaic module engineered for commercial rooftops, ground-mounted systems, and large-scale solar farms. As part of LONGi’s Hi-MO 7 series, this panel combines ultra-high wattage, bifacial energy capture, and advanced cell technology to deliver reliable long-term performance in demanding environments.
High Nominal Power Output
Delivers a rated output of 620W under STC conditions, reducing the number of panels required per installation
Ideal for projects targeting high power density and optimized balance-of-system costs
Bifacial Energy Generation
Bifacial cell design captures sunlight from both the front and rear surfaces
Rear-side energy gain benefits from reflected light off ground surfaces and structures
Under suitable installation conditions, total energy yield can increase by approximately 10–25% compared to monofacial modules
Advanced HPDC Half-Cell Technology
Utilises LONGi’s HPDC (High Performance Dual-Cell) architecture with half-cell construction
Reduces resistive losses and improves performance in low-light and partial shading conditions
Enhances long-term reliability and output stability for large solar investments
Thermal Stability and Environmental Resistance
Favourable temperature coefficient of –0.28% per °C, limiting performance losses in high-temperature climates
Designed to withstand 5400Pa front-side and 2400Pa rear-side static loads
Certified resistance to wind, heavy rain, and hail impact (25mm hailstones at 23m/s)
Durable Construction and Warranty Coverage
Dual-glass construction with semi-tempered glass for enhanced mechanical strength
Anodised aluminium frame with IP68 junction box and reinforced cabling
Backed by a 12-year product warranty and a 20-year linear power output warranty, ensuring predictable long-term degradation
Technical Specifications
Mechanical Parameters
| Specification | Details |
|---|---|
| Cell Orientation | 132 (6 × 22) |
| Junction Box | IP68, 3 diodes |
| Output Cable | 4mm², +400 / -200 mm (±1400 mm option) |
| Glass | Dual glass, 2.0 ± 2.0 mm semi-tempered |
| Frame | Anodised aluminium alloy |
Electrical Characteristics (STC)
| Specification | Value |
|---|---|
| Module Type | LR8-66HGD-620M |
| Maximum Power (Pmax) | 620 W |
| Open Circuit Voltage (Voc) | 48.78 V |
| Short Circuit Current (Isc) | 16.05 A |
| Voltage at Max Power (Vmp) | 40.91 V |
| Current at Max Power (Imp) | 15.16 A |
| Module Efficiency | 23.0% |
Operating Parameters
| Specification | Value |
|---|---|
| Operating Temperature | -40°C to +85°C |
| Power Tolerance | 0 ~ +3% |
| Voc / Isc Tolerance | ±3% |
| Max System Voltage | DC 1500 V (IEC/UL) |
| Max Series Fuse Rating | 35 A |
| NOCT | 45 ± 2°C |
| Protection Class | Class II |
| Bifaciality | 80 ± 5% |
| Fire Rating | UL Type 29, IEC Class C |
Temperature Coefficients (STC)
| Parameter | Coefficient |
|---|---|
| Isc | +0.045% / °C |
| Voc | -0.230% / °C |
| Pmax | -0.28% / °C |
Installation and Warranty Notes
Installation must be carried out by qualified solar professionals and mounted according to manufacturer guidelines. Warranty coverage applies subject to correct handling, installation, and system design. Suitable for commercial, industrial, and utility-scale applications where long service life and high energy yield are critical.
Let customers speak for us
Haven't used it yet but very happy with what i got and quick delivery. Thanks to the guy who informed me about the best product that will work in my situation. Got a lifePO4 100Amp battery and a charger witch is perfect for my 48lbs trolling motor. Thnx for your good and speedy service, im a very happy chap.
Thanks soo much for the great service you guys gave me with my GENX GYSER thats faulty immediately told me to sent it back and give me a new one now that i call service did not ask any questions immediately told me to fetch a new one keep up the good work will recommend to anyone
Wish to thank solar step for their excellent service and fast delivery. This is the business one can support!
My gas geyser no longer spark after 4 months, what can be the issue
My gas geyser no longer spark after 4 months, what can be the issue
This battery runs my lights, TV and decoder, Computer and monitor, speakers, internet, blender and all the other small draw items in my caravan. In 2 years I've had no problems and I'm happy. It's lying on the floor under the bed and being a LifePO I'm confident that it can't burst into flame and I sleep very well.
I'm traveling around southern Africa in the caravan and this is a very helpful power source, coupled with a 3000 watt inverter.
I do all my cooking on gas and stay in caravan parks which have electricity available, so I charge the battery through the inverter from the mains. Solar panels are big and clumsy to carry around - the smaller roll-up panels are not very efficient.
Received in time, installed and working very well.
As we were looking to purchase an inverter and a battery ,we were greeted via telephone, the salesperson was friendly and respectful,and helped us with all the info we required ,sent our invoice and payment was made...our tracking number has been recieved ....we will be dealing with The Solar Step again...thank your for the great service..
Thank you for the good service and speedy delivery.
Great value for money. This is the 3rd one we have fitted and they work great at half the price of the alternatives
Bought a 24v Ecco system from Solar step, good service and support.
I am very happy.
My Order was sent and delivered in supper quick time and everything was as ordered
Thank You Solar Step.
Recieved as ordered and in good condition.
