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Sonali 440W Solar Panel 120 Cell SS-M-440

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(28 ratings)
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Customer reviews & Questions

Verified buyer reviews
Customer Reviews A1 SolarStore on trustpilot
  • Reviews (28)
  • Questions
I chose this module for my residential setup because of the excellent customer service and attention to detail from a1solarstore. The installation process was smooth, and the performance has been outstanding.
I've been using the TopCon N-Type SS-420 module for six months, and I'm impressed with its efficiency. Even in cloudy weather, it delivers reliable power. The 30-year performance warranty is a bonus!
Installed these panels on my home’s roof. They’re efficient and handle varying light conditions well—great for smaller-scale setups.
Durable and dependable! I appreciate the robust build and the 25-year product warranty. These panels work great on my carport, even under harsh weather conditions.
Used this panels for a small project. Setup was straightforward, and they’ve been working consistently.
We deployed a significant number of these panels for our solar farm, and they’ve delivered consistent energy output. While logistics and setup for such a large volume were challenging, the overall efficiency and reliability make them a worthwhile investment.
The 30-year warranty is reassuring, though the initial cost was higher than expected. Overall, a practical solution for large-scale energy needs.
Durable and dependable! I appreciate the robust build and the 25-year product warranty. These panels work great on my carport, even under harsh weather conditions.
Perfect for solar farming! The panels handle diffused light well and are very efficient. Knowing they comply with global standards gave me peace of mind when investing in them.
They perform well and provide consistent energy output. A reliable option for large-scale projects, though installation required careful planning due to the size.
I chose this module for my residential setup because of the excellent customer service and attention to detail from a1solarstore. The installation process was smooth, and the performance has been outstanding.
Installed these panels on my home’s roof. They’re efficient and handle varying light conditions well—great for smaller-scale setups.
Used this panels for a small project. Setup was straightforward, and they’ve been working consistently.
Great quality product! I installed these panels on my commercial rooftop, and the energy output has exceeded my expectations. Highly recommend for anyone looking for durability and top-notch efficiency.
I've been using the TopCon N-Type SS-420 module for six months, and I'm impressed with its efficiency. Even in cloudy weather, it delivers reliable power. The 30-year performance warranty is a bonus!
The A1Solar team was incredibly helpful in guiding me through the process of choosing the right solar panel system for my home. The panels have been performing exceptionally well, and my electricity bills have been drastically reduced. Highly recommend!
A1 is a fantastic company to work with. The customer support team is always responsive and helpful.
Haven’t installed all the panels yet but I did a basic test with my ecoflow system and the panels got very close to their stated 390w output. They seem very sturdy and should last a long time. I’d definitely recommend Sonali panels and definitely recommend that whatever panels you get you buy them from a1solar. I had a great experience with them and the pickup location
Really impressed with Sonali Solar panels' performance and reliability, great buy!
Really impressed with Sonali Solar panels' performance and reliability, great buy!
ordered a pallet of sonali 440, the delivery was neat
ordered a pallet of sonali 440, the delivery was neat
these panels just arrived. the frame doesn't seem durable to me, but the store's service was nice
highly recommend, fantastic value.
highly recommend, fantastic value.
This panel was purchased to operate my big water pump. For this purpose, the 144 cell design with a 34 volt output is simple to connect and produces more than enough power. I would suggest it to anyone searching for compact, high-efficiency solar panels.
These Sonali panels' slim size allowed them to fit nicely on our roof. The MC4 connectors are used to link them. Compared to our previous set of panels, which started causing us connection problems, the new panels take up far less space and charge the batteries more quickly.
Placed it on my Jeep's roof to power a battery bank for my refrigerator. has thus far had no trouble maintaining battery power even on days with a lot of cloud cover. really robust. despite taking multiple beatings from branches it keeps working!
Have a question about Sonali 440W Solar Panel 120 Cell SS-M-440? Feel free to ask!

Specification

Cell TypeMonocrystalline
ManufacturerSonali Solar
Operating Temperatures −40°F to +185°F
Use
  • Commercial
  • Grid-Tie
  • Off-Grid
  • Residential

FAQ

How much is shipping and how long is delivery?
Our standard shipping charge is $250 for up to 11 panels and it is increased by $25 for every 4 additional panels. In the event, the product is only available on East or West coast custom quote will be sent to you before the order is processed. Normally, we are able to deliver solar panels within 7 business days.
What is the difference between low price panels and top price panels?
With top tier solar panels, you pay for the brand name, proprietary new technology, higher energy output, and better warranty support.
What are the dimensions of the panel?
Please refer to the product datasheet on the product page. We have a datasheet for every product we sell.
How long is the warranty on the panel?
In general, manufacturers provide a 25 year-long performance warranty and a 10 year-long equipment guarantee. Some manufacturers offer 12-15 years of warranty. More information is available in our warranty support section.
Which panels do you recommend for RV, marine?
We recommend Panasonic and Mission Solar panels for smaller systems as their high energy output and excellent craftsmanship guarantee years of service.
Can this panel be used with a 12v system?
Any of our panels can be used for a 12v system with a properly selected inverter and charge controller.
Can I pick up this panel from your fulfillment center to save on shipping?
Yes, we can set up a pick up at a local distributor. Please call to discuss options and stock availability.
How do I connect these panels?
To achieve the best system efficiency, panels should be connected in series to create higher voltage.
How many panels do I need?
This number is determined by your average energy needs. Depending on the type of panels and energy consumption, you might need anywhere from 12 to 45 solar panels. Remember, the more panels you install the more energy you will get.Please use our solar calculator to estimate your energy consumption and plan on building a solar system that will exceed your energy needs by 25%.
How do I build a solar system?
Please use our solar calculator to estimate what equipment you need. Choose your panels, microinverters, inverters, and solar batteries if necessary.Please note that we do not offer solar system design or installation.
How do solar panels compare?
Solar panels differ by power output, voltage, connection type, size, efficiency, and weight. Some solar panels might be sold together with microinverters as a set.
Can I build a solar system by myself as a Do It Yourself project?
Yes, it is possible if you understand what solar equipment you need and how to connect it together. However, please be mindful that handling your own electrical work without having proper experience might cause life-threatening injuries. Please contact a certified electrician if you do not possess appropriate electrical skills.
Can I connect and charge my solar panel battery directly with the solar panel?
We do not recommend using the solar panel without the charge controller. Using solar panels without the charge controller might damage the batteries.
Can I drill holes into the aluminum frame for mounting?
We do not recommend drilling any new holes to the aluminum frame of the panel as it could damage the internal circuit and solar cells. (Also, any modification to the panel will void the warranty). We recommend only using the pre-drilled holes for mounting.
Do solar panels require maintenance? Can I wash my solar panel?
Solar panels generally require very little maintenance. We recommend cleaning the solar panel with water, glass cleaner (Windex) and microfiber cloth.
Will my panel produce power in an overcast condition?
While solar panels require sunlight to generate solar energy, they will still work in cloudy weather. Even on a cloudy day, solar panels will produce energy just not as much.
Will my panels produce power if covered with snow?
Solar panels cannot produce electricity if covered with snow.
What is the best direction for a solar panel to face?
The best direction for a solar panel to face is the South

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