Products

Product Overview

This 72-cell mono 156.75mm solar panel is designed as a replacement module for legacy solar power systems installed mostly before 2020. 
Many early photovoltaic installations used M2 156.75 mm monocrystalline cells in 72-cell configurations. As the solar industry has shifted to larger wafter sizes (166 mm, 182 mm, and 210 mm), all major manufacturers have discontinued these legacy panel formats. 
To support ongoing maintenance of existing PV systems, compatible replacement modules are required to maintain string voltage consistency, mounting compatibility, and system performance. These modules are suitable for repairing or replacing damaged panels in utility-scale solar farms, commercial rooftops, and early residential installations. 

Parameter	Pmax(W)	Efficiency(%)	Voc(V)	Isc(A)	Vmpp(V)	Impp(A)
FL-335M-72	335	17.4	47.5	9.8	39.2	8.55
FL-340M-72	340	17.6	48	9.85	39.7	8.56
FL-345M-72	345	17.8	48.6	9.9	40.1	8.6
FL-350M-72	350	18.1	49.1	9.95	40.5	8.64
STC (Standard Test Conditions): Irradiance 1000 W/m², Cell Temperature 25°C, AM1.5
TempCoeff_Pmax(%/°C)		-0.37		Tempered Glass		3.2mm
TempCoeff_Voc(%/°C)		-0.29		Aluminum Frame		Anodized
TempCoeff_Isc(%/°C)		0.05		Max System Voltage(V)		1000
NOCT(°C)		45		Max_Fuse(A)		15
Cell Qty		72 Cells		Cable_Size(mm²)		4
Cell Size		156.75x156.75mm Mono		Cable_Length(mm)		900
Module Dimensions		1956*992*40mm		Connector		MC4
Weight(kg)		22.8		Junction Box		IP67

Key Features
Compatible with legacy 156 mm cell solar arrays
72-cell configuration used widely before 2020
Available in 340W-350W power range
Compatible electrical parameters for existing PV strings
Standard aluminum frame and Junction box
Suitable for grid tied and off grid solar systems
Reliable long-term outdoor performance
Typical technical Specifications
Applications

Solar farm maintenance
Commercial rooftop solar systems
Residential PV installations
Replacement of discontinued solar panels
Repair of legacy photovoltaic systems
FAQ
Q1: Why are 340W-350W 72-cell mono solar panels difficult to find today?
Most solar manufacturers have transitioned to larger wafer sizes and higher power modules, making older 156mm 72-cell panels discontinued in mass production.
Q2: Can I replace a damaged panel with a higher power module?
It is possible, but the electrical parameters and size may not match the existing PV string, which could reduce system efficiency.
Q3: Why is it important to match the original panel size?
Matching the original dimensions ensures compatibility with existing mounting systems and simplifies installation.
Q4: Can replacement modules be customized?
Yes. Replacement panels can be produced with similar electrical parameters to match existing solar arrays.
Q5: Who typically needs these replacement modules?
Solar farm operators, EPC maintenance companies, and system owners managing installations built before 2020.