What are the main functions of a solar controller?

Main functions include charging management, discharge protection, load control for connected devices, and system monitoring of voltage, current, and capacity.

What is the warranty period for this product?

The product comes with a 1-year warranty and 1-year after-sales service.

High-Efficiency 20A Solar Charge Controller for Optimal Energy Use

Name: High-Efficiency 20A Solar Charge Controller for Optimal Energy Use
Brand: Zhongshan Juneng Jiu Technology Co.,Ltd
SKU: 2278736355

Guangdong, ChinaZhongshan Juneng Jiu Technology Co.,Ltd

US$13.50-36.50

500 Pieces

Product profile

Customization

Available

After-sales Service

1 Year

Warranty

1 Year

Model NO.

SKA

Condition

New

Certification

ISO, CE

Application

Solar System Controller

Rated Voltage

12V/24V

Transport Package

Box

Specification

18.5*11.7*5cm

Trademark

Junengjiu

Origin

Zhongshan, China

Production Capacity

50000

Key features

High Energy Efficiency: Advanced 20A controller optimizes solar energy system efficiency and extends battery life.

Comprehensive Protection: Features overload protection, overcharging prevention, and over-discharge protection.

Multi-Battery Compatibility: Supports Lead-acid, Lithium, and Gel battery types for versatile applications.

Dual Controller Options: Available in PWM for budget systems and MPPT for high-power, low-temperature environments.

Smart Night Management: Automatically stops charging at night and manages discharge to prevent over-discharge.

System Monitoring: Displays and monitors key data including voltage, current, and battery capacity.

1-Year Warranty: Includes 1-year warranty coverage for peace of mind and product reliability.

Customization Available: Offers ODM services with customization options from designs and samples.

Company profile

Product CertificationQuality AssuranceExhibition ExperienceFast Delivery

Zhongshan Juneng Jiu Technology Co.,Ltd

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 1 Year CertifiedNearest Port: Zhongshan PortAverage Response Time: ≤4.20h

AI-Powered supplier vetting

SummaryThe supplier is identified as a combined company and a trade company located in Zhongshan, with associated companies in manufacturing. It reports CE and RoHS certifications, customization from designs and samples, ODM services, and new product development during the past year. Production resources include three production lines and several listed machines, but the supplier does not continuously reconcile production quantities for each batch. Service procedures exist for supplier assessment, corrective actions, and complaint handling, yet no written records were provided. Overseas service infrastructure is limited: no overseas warehouse, showroom, agents, or branches, and no overseas service countries were reported. Financial records are referenced for 2022–2024, but no financial performance details are provided. No available SDK, no factory environmental impact assessment report, and no OEM service for popular brands were reported.

CertificationsThe supplier reports CE and RoHS certifications. These are explicit product or compliance certifications and provide positive evidence for this field.

After-Sales capabilityThe supplier has procedures for complaint handling, corrective and preventive actions, and service-capability assessment, but no written records are available. It has no overseas warehouse, showroom, agents, or branches, and reports service availability in zero overseas countries, limiting demonstrated after-sales coverage.

R&D capabilityThe supplier reports new products during the past year and provides ODM services, demonstrating some product-development capability. However, it explicitly reports no available SDK, so the evidence does not support a fully strong innovation capability across the requested scope.

Production capacityThe supplier lists multiple production-related facilities or equipment and reports three production lines. However, it does not continuously reconcile quantities for each batch or bulk production, which is an explicit production-control deficiency.

Customization capabilityThe supplier explicitly supports customization from designs and samples and provides ODM services. These capabilities directly demonstrate design-based and sample-based customization.

Product Q&A

Q:What is a solar controller?

A solar controller manages electrical energy transmission between solar panels and batteries, preventing overcharging or over-discharging to extend battery life and optimize system efficiency.

Q:What is the difference between PWM and MPPT controllers?

PWM reduces panel voltage directly with lower efficiency, suitable for small systems. MPPT dynamically adjusts the operating point for maximum power, offering higher efficiency for high-power or low-temperature systems.

Q:What types of batteries can be used?

Most controllers support Lead-acid (sealed/open), Lithium (LFP, ternary), and Gel batteries. Users must confirm compatibility with their specific battery type.

Q:Does the controller have overload protection?

Yes, most controllers include overload protection that automatically cuts off output when load current exceeds the rated value to protect the system.

Q:How does the controller work at night?

At night, the controller stops charging and manages battery discharge to the load according to settings, preventing the battery from being over-discharged.