What are the warranty and after-sales terms?

The product comes with a 1-year warranty and 1-year after-sales service. The condition is new, and it has passed 100% visual and function inspection.

What is the minimum order quantity (MOQ)?

The Minimum Order Quantity is 2000 units.

What are the lead times for production?

The peak season lead time is one month, while the off-season lead time is within 15 workdays.

High-Efficiency Junengjiu PWM Solar Controller for off-Grid Systems

Name: High-Efficiency Junengjiu PWM Solar Controller for off-Grid Systems
Brand: Zhongshan Juneng Jiu Technology Co.,Ltd
SKU: 1972878971

Guangdong, ChinaZhongshan Juneng Jiu Technology Co.,Ltd

US$4.00-6.00

200 Pieces

Product profile

Customization

Available

After-sales Service

1 Year

Warranty

1 Year

Model NO.

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 Efficiency PWM Control: Optimizes solar energy system efficiency by managing battery charging and discharging cycles.

Dual Voltage Compatibility: Supports both 12V and 24V rated voltages for versatile off-grid solar system applications.

Comprehensive Protection: Features overload protection, overcharging prevention, and over-discharging safeguards for battery life.

Multi-Battery Support: Compatible with Lead-acid, Lithium (LiFePO4, Ternary), and Gel batteries for flexible usage.

CE & ISO Certified: Meets international quality and safety standards with CE and ISO certifications.

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

1-Year Warranty: Provides a 1-year warranty and after-sales service for peace of mind.

New Condition Quality: Manufactured as new condition products with 100% visual and function inspection.

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: ≤1.63h

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 the function of a solar controller?

It 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 controllers directly reduce panel voltage to battery voltage with lower efficiency, suitable for small systems. MPPT controllers maximize output power by dynamically adjusting the operating point, offering higher efficiency for high-power or low-temperature systems.

Q:Which battery types are supported?

Most solar controllers support multiple battery types, including sealed and open lead-acid batteries, lithium batteries (LiFePO4, ternary lithium), and gel batteries.

Q:Does the controller have overload protection?

Yes, most solar controllers have overload protection. When load current exceeds the rated value, the controller automatically cuts off the output to protect the system.

Q:How does the controller work at night?

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