Description

Epever STI300 MPPT solar charging controller

Overview

Epever STI300 is a high-power MPPT solar charging controller produced by Beijing Huineng Jingdian Technology (Epever). This product is specially designed for medium and large-scale off-grid solar power generation systems. Its core function is to efficiently manage the charging process of the battery pack from the solar panel array.

The MPPT (Maximum Power Point Tracking) technology is the core value of this controller. It can track the maximum output power point of solar panels in real time, thereby maximizing the efficiency of solar energy collection (compared with traditional PWM controllers, it can increase the power generation efficiency by 20%-30%). The STI300 model indicates that it can carry a maximum charging current of up to 300 amperes and is suitable for applications where the power of the photovoltaic array is extremely high.

Core features and advantages

1. Efficient MPPT tracking technology
By adopting the advanced MPPT algorithm, the tracking efficiency can reach up to 99.9%, significantly enhancing the power generation efficiency of the entire photovoltaic system. This advantage is particularly evident in complex environments such as light variations, overcast or low-temperature conditions.

It has a wide input voltage range (for specific values, please refer to the manual, usually up to several hundred volts), allowing multiple solar panels to be connected in series to increase the voltage, thereby reducing line losses during transmission and is suitable for long-distance power transmission scenarios.

2. Ultra-high current carrying capacity
The maximum charging current of 300A enables it to support ultra-large photovoltaic arrays (with power reaching tens of kilowatts) and charge large battery packs (such as lead-acid and lithium batteries) quickly and efficiently.

It adopts industrial-grade components and a robust design, capable of withstanding long-term stable operation under high current.

3. Comprehensive battery management and protection
Intelligent charging management: It offers multi-stage charging modes (strong charging, balanced charging, float charging, etc.) and supports charging algorithms for various battery types (sealed, gel, flooded lead-acid batteries and lithium batteries), effectively extending the service life of the battery.

Epever STI300

Comprehensive system protection: Equipped with all-round protection functions such as battery overcharge, overdischarge, reverse protection, solar panel reverse connection protection, load overcurrent protection, short circuit protection, and over-temperature protection, ensuring the safe and reliable operation of the system.

◦ Programmable functions: Supports setting charging parameters, load control modes (such as light control + time control), etc. through software to meet personalized needs.

4. Powerful monitoring and communication functions
It is usually equipped with an RS485 communication interface and supports the Modbus protocol, which can be easily integrated with remote monitoring devices, data loggers, PCS or energy management systems (EMS) to achieve remote real-time monitoring, historical query and alarm management of data.

It can be externally connected to display units of models such as MT-50, providing users with intuitive system operation data (such as voltage, current, power, and status) and parameter setting interfaces.

5. Robust industrial-grade design
The metal casing is designed for harsh industrial environments and features excellent heat dissipation and protective performance.

It is suitable for installation in distribution boxes and meets the reliability requirements for long-term continuous operation.

Typical application fields

STI300 is suitable for any off-grid scenario that requires high-power and high-efficiency solar charging:
• Large-scale off-grid power stations: Large-scale power supply systems for villages, base stations, outposts and pastures in remote areas.

• Industrial applications: Power supply for communication base stations, monitoring equipment, cathodic protection of oil pipelines, maritime navigation and other fields.

• New energy transportation: Large-scale power systems for solar-powered electric vehicle charging stations, recreational vehicles and yachts.

• Agriculture and Irrigation: High-power off-grid irrigation systems.

Summary of Technical Specifications

• Manufacturer: Epever (Beijing Epsolar Technology Co., Ltd.

Model: STI300

• Type: MPPT Solar charging controller

• Rated system voltage: Typically 12V/24V/48V, automatically identifiable or settable (confirmation required)

• Maximum charging current: 300A

• Maximum solar input power: For instance, under a 48V system, it can reach approximately 15kW or more (power = voltage * current, precise calculation required)

• Communication interface: RS485 (Modbus RTU)

• Battery type support: Lead-acid batteries (sealed, gel, rich liquid), lithium batteries (compatible model support required)

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
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