How long do solar panels last and solar panels reviews

This article will highlight the best solar panels in the markets by looking at the major metrics; efficiency, warranties, performance, and price of each.
Efficiency can be described as how well a solar panel converts sunshine into electricity. Performance on the other hand is how well the solar panel can handle conditions that are not so ideal. The price is how much the panel costs and the warranty is the assurance the manufacturer gives to the buyer promising to repair the panel in case it malfunctions within a specified time.

1. SunPower Solar Panels

SunPower is one of the most sustainable and innovative energy companies in the world that has provided solar services and solutions to their diverse clients including schools, residential clients, governments, and businesses. It began in the 80s and in 1988 it was named SunPower and is one of the world’s leading solar companies. SunPower studies show only one out of 37,000 their solar panels fail which indicates that their panels have a very low failure rate and thus reliable.
Efficiency: SunPower solar panels are one of the most efficient solar panels in the market and in fact top the list in terms of panel efficiency. They have an efficiency of 16.5% – 22.8% while most of the panels in the market fall between 14% and 18% efficiency range.
Performance: For this metric, the temperature coefficient is used to show the solar panel performance. Like any other electronic device, solar panels work best in cool conditions. For every degree beyond 25 degrees Celsius, the performance of the panel energy production reduces by -0.4% for most panels. SunPower panel electricity production reduces considerably less in comparison to other solar panels as its performance reduces by -0.29% to -0.37% for every degree above 25 degrees Celsius. Partial shade can also be a cause for performance reduction and for some models, a small thing such as bird poop can affect performance. SunPower has technologies that reduce such impacts.
Warranty: SunPower gives a 25-year warranty one of the best that comes with solar panels. Unlike most brands that provide a performance warranty of indicating their panels will have a performance of 80% and 83% of their original performance, SunPower states their products will be performing at 92% of the original capacity after 25 years.

Price: SunPower panels are the best in the market and their product prices are actually not as high as you would think. They cost between USD 2.83/Watt and USD 3.83/Watt

2. LG Solar Panels

These solar panels are among the panels on top of the food chain. LG is a company that has been popular over the years in manufacturing consumer electronics, home appliances, and mobile communication devices. With their vast experience and leveraging their brand power, they developed solar modules that deliver high efficiency and power output with long-term reliability. LG has two main panel ranges which are Neon 2 panels and Neon R panels.
Efficiency: On these panels, the efficiency varies depending on the model purchased with the lowest at 18,4% efficiency and a high of 21.7% efficiency for the premium LG solar products. Generally, this is a high-efficiency rate when we compare them to other solar panels in the market.
Performance: Performance of a panel is measured using the temperature coefficient. This is basically how the solar panel performs on hot summer days. LG solar products have a temperature coefficient ranging from -0.4% to 0.30% per degree Celsius that is above 25 degrees.
Warranty: LG offers a 25-year warranty meaning that you can get a replacement in case the product will malfunction due to manufacturing faults. This is one of the longest warranties in the market. They also advise that they have a dedicated network of dealers that arrange the replacement of panels on warranty with free labor.
Price: Typically the LG systems cost between USD2.64 and USD3.30 per Watt. Their products are popular in the market for their good praises especially the Mono X plus and Neon 2 black series.

3. REC solar review
The REC group was founded in 1996 in Norway and in the 20 years has been providing high-performance and sustainable solar products. They have recorded over 30 million solar panels manufactured, providing about 12 million people consume clean energy.
Efficiency: The product efficiency is specific for the product you purchase but on average, their efficiency rating ranges from 15.2% to 19.8%. Out of all their five series, the REC n PEAK has the highest efficiency of 19.8%.
Performance: Every solar panel has its unique temperature coefficients which have a direct effect on the power output. Typically, an increase in the temperature of the solar panel translates to a decrease in the power output. REC solar panels have a temperature coefficient of -0.31% to -0.33% per degree Celsius.
Warranty: Depending on the series, REC provides a warranty of 20 years, 12 years, and 10 years. REC also gives a 25-year linear warranty for all its products.
Price: The price of REC solar products ranges from USD 2.87 to USD 3.05 per watt.

4. Q-cells Solar Panels
Q-cells is one of the world’s famous photovoltaic manufacturers due to its high performance and high-quality solar products as well as good pricing. All their models begin with the letter Q such as the Q.PEAK, Q.POWER, and Q.MAXX, and so on.
Efficiency: The efficiency of these panels ranges from 17.1% to 19.6% which can generally be said to be average. Each product, however, comes with its own specific efficiency. Products of 18% efficiency and above are considered ones with high ability in converting sunshine to useful energy.
Performance: The electricity production of a solar panel ideally reduces for any degree increment above 25 degrees Celsius. This means that the panels perform least on very hot days of summer. The Q-cells temperature coefficient ranges from -0.40 to -0.35.
Warranty: Previously Q-cells offered a 12-year warranty to all their solar panels against any defects but are now giving a 25-year warranty on their product.
Price: The Q-cells products are generally priced from USD 2.54 to USD 3.25 per watts. They may not have the highest efficiency in the market but their friendly cost has made them popular as they give value for money.

5. Panasonic Solar Panels

Panasonic has been popular with home appliances and electronics since 1975. It began manufacturing amorphous solar modules panels until 1997 when they transferred to their staple HIT panels.
Efficiency: On average, the Panasonic solar panels have an efficiency of between 19.1% and 20.3%. The Panasonic to be used for Telsa’s solar roof and incorporated into their HIT panel range have recorded up to 20% solar panel efficiency.
Performance: Panasonic panels have the lowest temperature coefficient recorded at -0.26%. Their HIT technology is what has given these panels such great performance ability as well as their ultra-thin and monocrystalline amorphous silicon layers. Their panels a surface are also shaped as pyramids which also helps in reducing reflection and direct more sun rays into the solar cells resulting in maximum electricity output.
Warranty: Panasonic is among panels that have the best warranties offer a 25-year warranty against any malfunctions in their solar products.
Price: Generally the Panasonic system costs between USD 2.64 and USD 3.34 per watt.

Learn more about solar panels at

Powering your mobile phone using solar phone chargers


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Solar phone chargers can be a lifesaver if you know what they are and how to use them. These devices aren’t by any means an ideal replacement for your charger that you use every day in an outlet, but they will definitely come in handy if you’re going to be off the radar for a while. On average, it will take about 10 hours to get a full charge. This may seem like a long time to charge your device- however, these gadgets are completely portable. If you ever find yourself in a situation where you don’t have access to electricity, you’ll be able to see the true value of one of these chargers. Instead of being stuck with no phone, you can plug in your cell and charge it up any time, anywhere. it’s always good to have a Plan B.

Here’s an important tip for buying a solar phone charger; make sure that you buy a charger with the right wattage to charge your phone. The smaller the device, the less wattage required, and vice versa. This means that if you plan on using your charger on electronics that require more electricity to charge as well, then you’ll want to look at solar chargers with higher wattage to meet your needs. On average, a 7 Watt charger will work perfectly fine for a smartphone. On the other hand, if you want to charge a tablet you’ll need to look for a charger of about 9 Watts, and a laptop will require at least 17 Watts.


A solar phone charger is made for when you forget to pack a charger when you leave home or you’re going to be traveling without having constant access to electricity to keep your battery life full. Solar phone work by absorbing energy from the sun, then outputting that electricity into your phone to charge your battery without the need for an outlet. These devices are a very handy contraption to keep with you on the go, at school, or at work.


The price of solar panel chargers can vary depending on where you shop and how much quality you require. If you’re working on a budget and don’t want to spend a fortune on one of these devices but you still want to invest in one for emergencies, you can pick one up at your local Walmart for as little as $15. However, the prices rise gradually and then skyrocket from there. If you’re a billionaire or someone without a real spending limit, though, then there are solar phone chargers out there that cost as much as $900 if you’re willing to spend that kind of money on them.

Solar Charging- The Time it Takes

On average it will take you approximately 25-30 hours to fully charge your power bank, and a full charge, on average, can typically charge a cell phone about 12 times before running out of juice.

However, you should also know that charging times vary depending on what type of charger you have and how many panels come with it. When it comes to panels, the more you have the merrier. Here are a few examples of about how long solar panel charger banks with different mAh (battery capacity) take to charge completely:

When to Charge

Early in the day as the sun is rising, the sun is actually brighter despite how much cooler the air itself feels. Because of this, the preferable time to charge your solar charger is actually closer to the morning rather than when it is hotter outside in the middle of the day. The heat does not speak for the amount of actual sunlight that your power bank will receive, so don’t think that just because it’s hot means that you’ll get a full battery faster. In fact, trying to charge your device in the blazing heat can actually cause damage to it.

You can also get a charge in indirect sunlight as well. This won’t give you the same amount of power at the same speed as the direct sunlight will, obviously, but you will get there eventually.

What to Look Out For Before Completing Your Purchase

We all have different lifestyles and therefore different needs. There are a few things that you’ll want to check about the charger that you’re about to buy before finalizing your purchase. First off, make sure that you’re buying a charger that will hold the right amount of life before needing a new supply of sunlight. If you’re going to be using only your solar phone charger for long periods of time, you’ll need to have a bank with enough capacity to suit your needs.

Next, read reviews about it. You should always check star ratings and reviews before buying a product online, but especially with devices like this. Make sure you’re getting something that won’t break within a week. Finally, read the entire product description to make sure that you’re not buying a full-sized generated instead of a portable phone charger.

Overall Conclusion

Overall, a solar phone charger should by far be a wonderful investment for everybody. There are some inconveniences such as long charging times and the need for sunlight, but there are also so many great things about this technology that could benefit a number of people in various ways. If you forgot to plug up your phone the night before and don’t have time to charge it, just put your portable charger in your purse or backpack. Going camping for the weekend? Bring along your power bank and stay charged in case of emergency, if something happens and you need to contact the outside world but don’t have time to drive or walk there yourself. Learn more here about a review of solar phone chargers, including there applications.