Complete Solar System
Sunpal complete solar power system kit including certificated solar inverter and storage battery for home and commercial.
  • Solar Energy System
    Sunpal supports On Grid, Off Grid, Hybrid solar energy system for residential and commercial use from 1Kw to 1000MW.
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  • Solar Inverter
    Sunpal inverter has cover hybrid, on grid, off grid solar inverter and microinverters, the brand contains the Growatt, Goodwe, Huawei, Deye, Solis, Hoymilies, Invt, Solax, and Sunpal.
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  • Lead Acid Battery
    Sunpal solar energy storage battery contain the 12V GEL battery, 2V Lead Acid Battery, and Front Terminal VRLA Batteries.
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How It Works
  • 1.
    We Design & Ship
    We collaborate with you to design and deliver a system that meets your utility usage and needs — selecting equipment from 50+ manufacturers so you don’t have to compromise.
    We Design & Ship
    We Design & Ship
  • 2.
    You Contract or Install
    Whether you want to install the system on your own or hire local contractors directly, managing the installation yourself ensures the fastest return on your solar investment.
    You Contract or Install
    You Contract or Install
  • 3.
    Lifetime Support
    Even after your system is installed and operating, you can always count on Unbound Solar to provide the support you need — free. Just contact us at any time, and we will be there for you.
    Lifetime Support
Over 2GW Photovoltaic Solar Panels Installed Worldwide, 30000+ Solar System For Homes And Business Owners
Our Customer's

Environmental Impact

Welcome To Join & Consult Us, We Are :
  • More Choice. Total Control. Lifelong Service.

    More Choice. Total Control. Lifelong Service.

  • Reliable. Honest. Expert.

    Reliable. Honest. Expert.

  • Self-Reliance. Independence. Sustainability.

    Self-Reliance. Independence. Sustainability.

Total Solar Systems
MegaWatts Installed
CO2 Reduced
,000+ tons
Trees Saved
What Customer say
These solar panels are the most advanced, sturdy, durable, and efficient panels. They are worth paying every penny. What I bought is a residential off-grid solar system, and the system works very well during use. I purchased all the components including modules, batteries, brackets, inverters, and so on from Sunpal. So far, I am very satisfied with this solar system and accessories. So far, my solar panels have not had any problems. Good product, highly recommended.
Harold Castellon
Harold Castellon


These are a little on the heavy side, however that is probably because they are very sturdy and very well built. They provide continuous satisfactory output even with overcast days. Fast shipping and professional service, the box arrived in good condition. There were no smudges on the surface, I'm very happy with the quality.
Rodrigo Lopez
Rodrigo Lopez


Thanks to Sunpal's professional services and Cathy's enthusiastic help. You are very kind and professional to arrange all the processes like including system design, quotation, packaging, transportation arrangements, logistics information update, etc. I'm very satisfied with the package, the goods' quality, I will recommend you to my friends.
Hassan Al Ansari
Hassan Al Ansari


I ordered 2*40 feeds solar panels 1270 PCs and they arrived in good condition. Once tested I was happy with the output that was higher than another brand panel that I bought another solar module factory in China. I am in a northern state of America and the sun is always less than directly overhead. These panels when connected 2 in series to a inverter are outputting near their rating for about 3+ hours per day and are above 60% of their rated output for more than 6 hours per day. Because I was happy with the first order, now Sunpal is the only solar panel supplier,  I will be ordering additional panels from them.
Sic kuon Chan
Sic kuon Chan


Solar News
All about the latest solar tends and technology.
  • 2023.Nov 10
    The difference between AC coupling and DC coupling of optical storage systems
    The difference between AC coupling and DC coupling of optical storage systems introduction Energy storage technology refers to the process of storing energy through media or equipment and releasing it when needed; photovoltaic + energy storage combines solar photovoltaic power generation with energy storage technology to store the electric energy generated by the photovoltaic system so that it can be used when needed. Ensure stable power supply when needed. Currently, the system solutions for photovoltaic + energy storage on the market mainly include DC coupling and AC coupling. So what is the difference between these two solutions? The difference between DC coupling and AC coupling DC coupling means that energy storage cells and photovoltaic modules are connected to the DC side of the integrated photovoltaic and storage machine. The integrated photovoltaic and storage machine is directly connected to the photovoltaic modules, and the energy collection point is on the DC side. AC coupling means that the energy storage system and the photovoltaic system are connected on the AC side. , the energy storage system (battery, energy storage inverter) and the photovoltaic system (photovoltaic modules, photovoltaic inverter) work independently of each other, and the energy collection point is on the AC side. However, due to differences in circuit structures and electrical equipment between the two, there are also major differences in working principles, flexibility, efficiency, etc. 1 Differences in working principles DC coupling: In this solution, the photovoltaic inverter and the bidirectional converter are integrated into a photovoltaic-storage integrated machine, and are directly connected to photovoltaic modules, power grids, batteries, etc. to form a whole. When the photovoltaic system is running, the electricity generated can charge the battery through the photovoltaic storage integrated machine, supply power to the load, or be input into the power grid. AC coupling: This solution includes two parts: photovoltaic system and energy storage system. The photovoltaic system consists of photovoltaic arrays and photovoltaic inverters; the energy storage system consists of energy storage inverters and batteries. The two systems can operate independently without interfering with each other, or they can be separated from the power grid to form a microgrid system. When the photovoltaic system is running, the generated power can be used to power the load through the photovoltaic inverter or be input into the grid, or it can be used to charge the battery through the energy storage inverter. 2 flexibility difference DC coupling: In this solution, photovoltaic modules, photovoltaic storage integrated machines and batteries are in a serial state and are closely connected to each other. The addition and removal of equipment is complicated and the flexibility is average. It is mainly used in new photovoltaic markets, such as newly installed Photovoltaic storage sys...
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  • 2023.Nov 02
    Is installing photovoltaics in rural areas harmful to human health?
    Is installing photovoltaics in rural areas harmful to human health? "Is installing photovoltaics in rural areas harmful to the human body?" On September 20, some netizens asked on the platform: At present, some towns and villages in County A have promoted rural photovoltaic projects, and they need to sign a contract with the operator during installation. How do the relevant departments supervise this kind of photovoltaic project? In addition, if photovoltaic panels are installed on the roof of your home, will there be any radiation to the human body? In response, the Development and Reform Commission of County A gave a detailed reply on the same day. According to reports, in order to promote the healthy and orderly development of distributed photovoltaics and improve the management level of distributed photovoltaics, in July this year, Municipal Development and Reform Commission, Municipal Urban and Rural Development Bureau, Municipal Agriculture and Rural Affairs Bureau, Municipal Emergency Management Bureau, and Municipal Market Supervision and Administration Bureau , the Municipal Power Supply Company jointly issued the "Notice on Regulating Distributed Photovoltaic Management in City A (Trial)", clarifying construction requirements, implementing main responsibilities, strengthening local supervision, and proposing reasonable and orderly access, and increasing laws and regulations related to distributed photovoltaics and policy publicity efforts to jointly optimize the development environment for distributed photovoltaic projects and effectively safeguard the people’s right to know. People who are unfamiliar with photovoltaic construction and development contracts can check the "Household Photovoltaic Power Station Cooperative Development Contract (Template)" and "Household Photovoltaic Product Sales and Installation Contract (Template)" published on the website of the National Energy Administration. Photovoltaic power generation projects belong to the encouraged investment projects in the "Guidance Catalog for Industrial Structural Adjustment". “The photovoltaic modules themselves do not produce any electromagnetic radiation when generating electricity, but in order to convert the DC power generated by the photovoltaic modules into AC power and connect it to the power grid, a lot of power equipment and electronic devices are usually required, and these devices will affect the operation of the power grid. The surrounding electromagnetic environment." The staff said that after scientific measurement, the electromagnetic environment of the solar photovoltaic power generation system is lower than the limits of various indicators; in the industrial frequency band, the electromagnetic environment of the solar photovoltaic power station is even lower than the value generated by commonly used household appliances. It will have an impact on personal health.
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  • 2023.Sep 08
    The difference between co-location and hybrid energy storage plant models
    The difference between co-location and hybrid energy storage plant models Co-location power station Modeled as an independent power station, energy storage facilities co-located with new energy power stations have independent metering arrangements, submit outage requests independently, receive dispatch instructions independently, and can be operated by different entities. CAISO has adopted several policy changes to help regulate co-located plants in participating markets. In 2021, CAISO implemented the Aggregate Capacity Constraint (ACC) function [2] [3] to ensure that dispatch orders to co-located power plants behind the utility grid connection point do not exceed the constraints of the utility grid connection point. ACC can also limit the battery's FM wins. CAISO has adopted rules allowing co-located energy storage plants to deviate from dispatch orders in certain circumstances in order to allow renewable energy plants at the same public grid connection point to generate electricity while meeting ACC limits. These changes will introduce optional features to prevent energy storage plants from receiving charging orders that exceed the dispatched operating targets of new energy plants at the same public grid connection point. The changes will also allow co-located storage plants to deviate from market charging orders to avoid charging from the grid when the actual output of renewable resources at the same public grid connection point is lower than predicted. hybrid power station Hybrid plants are modeled as single plants because they have a single bidding curve for all their components and receive unique dispatch instructions from CAISO. Hybrid plant operators self-optimize their resource components to meet dispatch directives.
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