How does a solar controller work at night?

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

Advanced Solar Panel Charge Controller for Renewable Energy Solutions

Name: Advanced Solar Panel Charge Controller for Renewable Energy Solutions
Brand: Zhongshan Juneng Jiu Technology Co.,Ltd
SKU: 2195274095

Guangdong, ChinaZhongshan Juneng Jiu Technology Co.,Ltd

US$4.00-10.00

800 Pieces

Product profile

Customization

Available

Condition

New

Certification

ISO, CE

Model NO.

MG21L

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

Dual Controller Efficiency: Offers both PWM for budget systems and MPPT for high-power, low-temperature efficiency.

Comprehensive Battery Protection: Prevents overcharging, over-discharging, and overload to extend battery life.

Multi-Battery Compatibility: Supports Lead-acid, Lithium (LiFePO4, Ternary), and Gel battery types.

Smart Load Management: Automatically cuts off output during overload and manages night-time discharge.

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

OEM and ODM Customization: Available for customization from both designs and physical samples.

Certified Quality Assurance: Meets ISO and CE standards with 100% visual and function inspection.

Flexible Payment Options: Accepts LC, T/T, Western Union, PayPal, and small-amount payments.

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 a solar controller?

A solar controller (also known as a solar charge controller) is a device used to manage the electrical energy transmission between solar panels and batteries. Its main functions are to prevent the battery from overcharging or over-discharging, extend the battery life, and optimize the efficiency of the solar energy system.

Q:What is the role of a solar controller?

Charging management: Controls the process of charging the battery by the solar panels to prevent overcharging. Discharge protection: Prevents the battery from over-discharging and protects the battery life. Load control: Manages the power supply to the loads (such as lights, devices) connected to the controller. System monitoring: Some controllers provide functions for displaying and monitoring data such as voltage, current, and battery capacity.

Q:What is the difference between a PWM controller and an MPPT controller?

PWM controller: Directly reduces the voltage of the solar panels to the battery voltage, with relatively low efficiency. Suitable for small-scale systems or situations with limited budgets. MPPT controller: Maximizes the output power of the solar panels by dynamically adjusting the operating point. Has higher efficiency and is especially suitable for high-power systems or low-temperature environments.

Q:What types of batteries can a solar controller be used with?

Most solar controllers support multiple battery types, including: Lead-acid batteries (sealed type, open type), Lithium batteries (lithium iron phosphate, ternary lithium, etc.), and Gel batteries. When choosing, you need to confirm whether the controller supports your battery type.

Q:Does a solar controller have overload protection?

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