ET-NC G3 MPPT Solar Controller – Supports 50A-100A charging, RS485, and high-efficiency MPPT tracking for off-grid solar.
The ET-NC G3 MPPT Charge Controller for Battery Storage is a high-efficiency solar charging solution designed for off-grid and hybrid energy systems. With 50A-100A charging capacity and 99.9% MPPT tracking efficiency, it maximizes power generation from solar panels while ensuring stable and reliable battery charging. Compatible with 12V, 24V, and 48V battery systems, it supports both lithium and lead-acid batteries, making it a versatile choice for various solar energy applications.
Equipped with RS485 communication, the ET-NC G3 allows for seamless integration with Bluetooth, WiFi, or 4G modules, enabling real-time remote monitoring and system control. Its CAN bus interface supports parallel operation of up to six controllers, making it ideal for large-scale solar energy storage solutions. Whether used in residential, commercial, or industrial setups, this controller ensures efficient energy management and system scalability.
Built for durability and long-term performance, the ET-NC G3 features a rugged metal housing and IP32/IP43 protection, providing resistance to dust, moisture, and extreme temperatures. Advanced electronic protections, including overcharge, over-discharge, short circuit, and thermal safeguards, help extend battery life and maintain system stability. With its high-efficiency MPPT tracking and smart charging capabilities, this controller is an excellent choice for anyone looking to optimize their off-grid solar battery storage system.
| Model | ET5420NC G3 | ET7420NC G3 | ET10420 NC G3 |
| Electrical Parameters | |||
| Battery Rated Voltage | 12/24/48VDC~Auto | ||
| Controller Operating Voltage Range | 8–62V | ||
| Battery Type | AGM (Default) / Gel / Flooded / User | ||
| Lithium Battery Type | LiFePO4 / Li (NiCoMn)O2 / User | ||
| Rated Charging Current | 50A | 75A | 100A |
| Rated Charging Power | 650W/12V 1300W/24V 2600W/48V | 975W/12V 1950W/24V 3900W/48V | 1300W/12V 2600W/24V 5200W/48V |
| Maximum Charging Power | 650W/12V 1300W/24V 2600W/48V | 975W/12V 1950W/24V 3900W/48V | 1300W/12V 2600W/24V 5200W/48V |
| PV Maximum Open-circuit Voltage | 200V (@ lowest temperature); 180V (@ 25℃) | ||
| MPPT Operating Voltage Range | (Battery voltage plus 2V, and > 28V) to 144V (@ 25 ℃) |
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| Tracking Efficiency | ≥ 99.5% | ||
| Maximum Conversion Efficiency | 98.3% | 98.1% | 98.5% |
| Temperature Compensation Coefficient | -3mV/℃/2V (Default) | ||
| Self-consumption (Enabled Communication) | 98mA/12V; 60mA/24V; 46mA/48V | ||
| Self-consumption (Disabled Communication) | 48mA/12V; 25mA/24V; 14mA/48V | ||
| Grounding Type | Common negative grounding | ||
| Dry Contact (Oil Generator / Utility) | Rated value: 5A/30VDC; Maximum value: 0.5A/60VDC | ||
| RS485 Communication Port | 5VDC/200mA (RJ45) | ||
| Mechanical Parameters | |||
| Dimension (Length × Width × Height) IP43 (Controller & White Terminal Cover) |
307 × 253 ×143mm | 320 × 263 ×158mm | 352 × 263 ×158mm |
| Dimension (Length × Width × Height) IP32 (Controller Only) |
307 × 202 ×134mm | 320 × 263 ×158mm | 352 × 212 ×149mm |
| Mounting Dimension (Length × Width) | 295 × 130mm | 308 × 140mm | 340 × 140mm |
| Mounting Hole Size | Φ7mm | ||
| Wiring Terminal | 6AWG/16mm² | 2AWG/35mm² | 2AWG/35mm² |
| Recommended Cable | 6AWG/16mm² | 4AWG/25mm² | 2AWG/35mm² |
| Net Weight IP43 (Controller & White Terminal Cover) |
5.00kg | 6.55kg | 7.79kg |
| Net Weight IP32 (Controller Only) |
4.79kg | 6.33kg | 7.55kg |
| Environmental Parameters | |||
| Operating Temperature Range | -25℃ to +60℃ (Derating when temperature is higher than 40℃) | ||
| LCD temperature range | -20℃ to +70℃ | ||
| Storage Temperature Range | -30℃ to +70℃ | ||
| Relative Humidity | 5%–95% (N.C) | ||
| Altitude | < 5,000M (Derating when altitude is higher than 2,000m) | ||
| Enclosure | Ip43 (Controller & White Terminal Cover); IP32 (Controller Only) | ||
| Pollution Degree | PD2 | ||
| Certification | |||
| Safety | EN/IEC62109-1 | ||
| EMC | EN61000-6-1 / EN61000-6-3 | ||
| FCC | 47 CFR Part 15, Subpart B | ||
| ROHS | IEC62321-3-1 | ||
Supports 12V/24V/48V systems; Charge current: 50A–100A
All metal die-casting shell, IP43
Some models supports two PV inputs
Max. MPPT tracking efficiency: 99.9%; Max. Conversion efficiency: 98.5%
Compatible with AGM, Gel, Flooded, LiFePO4 batteries, etc.
Constant voltage output function
Communication interface with electrical isolation
CAN: Parallel operation of up to 6 devices (with or without batteries)
BMS: Ensures reliable lithium battery charge management
RS485: Optional Bluetooth, WiFi, or 4G modules
Real-time data recording, event logging, and power statistics function
EMC compliant (CLASS B)
Product images are for illustrative purposes only and may not exactly match the actual item. All specifications and technical details should be verified using the official catalogs and datasheets provided by the respective manufacturer, as discrepancies may exist on this website.
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