Whether for your home, shed, cabin, RV, or camper, solar panel kits are an easy, cost-effective way to go solar, especially if it’s your first time entering the world of solar power. Let’s look at some of the best solar panel kits available in 2021, starting with the smallest and working up to the massive. No matter what your needs, there’s a great solar panel kit out there for you!
Solar panel kits come in all sizes, from tiny 80 watt folding solar panels for a weekend getaway in the mountains, all the way up to 10,000 watt systems permanently bolted to the roof of your home.
With so many different sizes available, we’ve decided to break down our list of best solar panel kits into three categories, Best Solar Panel Kits for Home, Best Solar Panel Kits for RV, and the Best Solar Panel Kits for Sheds to help you find the perfect kit for your power needs.
Let’s get started with a quick list of all 6 of our top picks for the best solar panel kits for 2021.
Top 6 Best Solar Panel Kits for 2021
- Best for a Home
- Best for a RV
- Best for Sheds and Small Buildings
Learn more about each of our top picks for the best solar panel kits in our in-depth reviews below.
Solar Panel Kit Reviews
All of the solar panel kits above include, at the very least, everything you need to connect your solar panel to your charge controller. This includes solar panels, a charge controller, and all of the required wiring. Many kits also include mounting hardware to connect the panels to the roof, wiring to go from the charge controller to battery, and fuses for wiring between the charge controller and batteries. Most kits do not include inverters or batteries, but we’ve specified if they do.
Best Solar Panel Kits for Homes
Solar panel kits for homes are the biggest kits available and can range from 1,000W to 10,000W or more. Most solar panel kits for home use are for off-grid systems, but grid-tied kits exist and we’ve included one below.
Let’s take a look at two good options.
Renogy is one of the biggest names in solar equipment for off-grid installations. They produce everything from solar panels to batteries to charge controllers and inverters. They’ve also put together one of the most legitimate large solar panel kits on the market. The Renogy Off-Grid Solar Kit is one of the best.
These kits, which come in multiple sizes from 1,200W to 4,800W, include:
- 320W monocrystalline solar panels.
- Midnite Classic MPPT charge controller – a fantastic product from a respected manufacturer.
- Midnite Solar combiner box.
- MidNite Solar enclosure and breakers.
- Most of the required wiring.
The kit is designed for large off-grid systems that could be used in a cabin or small house. It’s also the only kit on our list that includes an MPPT charge controller, which allows for more efficient electricity generation and lithium-ion batteries as well! You’re also able to remotely monitor the charge controller.
Depending on the size of the kit you choose, you’ll need a 12, 24, or 48-volt battery setup to go along with your solar panels. The kit also does not include an inverter or solar panel mounting equipment, so be sure to budget for those when planning your installation.
Even with these omissions, Renogy’s large off-grid solar panel kits are still a pretty good value when looking at the cost per watt, especially as you go up in size.
MidNite Solar is a big name in the off-grid solar industry, manufacturing combiner boxes, enclosures, and their ever-popular MidNite Classic charge controllers. With equipment from MidNite and the customer service of Renogy, you’re sure to be in good hands.
Bottom Line: Renogy’s large solar kits are a cost-effective option if you want to install your own off-grid solar kit. They come with Renogy’s excellent reputation for quality and customer service and include excellent components from well-known manufacturer Midnite Solar.
You still have to buy the batteries and mounting hardware, but these kits are a great building block to start from.
If you’re looking for a large solar panel kit for your grid-tied home, Grape Solar’s 5,830-watt kit is just about perfect. While you can find Grape Solar kits on Amazon, Costco offers the lowest price by far, so start there.
Grape Solar’s kit includes:
- Twenty-two 265 watt polycrystalline solar panels
- SolarEdge inverter and 22 power optimizers
- Mounting hardware
- Does not include any wiring and fuses
Grape Solar’s 265W panels are comparable to other standard solar panels. They come with a 10-year product warranty and a guarantee to function at 80% of their original capacity after 25 years of use.
Where this kit really shines is the included inverter, a SolarEdge with power optimizers. Unlike other inverters that treat the entire solar installation as one big solar panel, SolarEdge’s system includes small power optimizers that optimize each solar panel individually for max production.
In essence, SolarEdge’s inverter system squeezes each drop of production it can from this system, ensuring that you get the most energy for your investment.
If you’re looking to purchase a grid-tied solar panel kit, this is a pretty good option, but you need to work out costs to make sure it’s worthwhile. At $10,000, the cost breaks down to $1.72 per watt.
If you’re going to install the kit yourself, you’ll certainly save money over hiring an installer. However, if you’re looking to hire a company to install your kit, you’ll need to make your selection carefully.
The National Renewable Energy Lab’s 2018 Solar Cost Benchmark calculates solar installations with power optimizers should cost about $2.58 per watt to install, with $1.26 per watt going to equipment costs.
Compare this cost to Grape Solar’s $1.72 per watt and you’ll see the premium you’re paying by purchasing a kit through a secondary vendor instead of from the manufacturer.
If your installer can keep installation costs low, you might come out ahead financially by purchasing a kit yourself, but our advice is to talk to a handful of small, local installers before you buy the system. Describe the kit, what’s included, what’s required from them, and hear their cost estimates. It might make financial sense, it might not.
Bottom Line: If you’re planning to install the system yourself, the Grape Solar Grid-Tied Kit can save you quite a bit of money over hiring an installer.
However, if you’re hoping to save money by purchasing the kit yourself and hiring an installer to put it on your roof, you’ll probably come out ahead financially by simply taking advantage of your installer’s ability to buy equipment in bulk at lower costs.Learn More & Buy Now at Amazon
Best Solar Panel Kits for RV
Let’s now move on to solar panel kits for RVs. For camper vans, we limited ourselves to 100W or below. RVs typically have much bigger electricity needs than camper vans, so let’s take a look at solar panel kits between 200W and 400W.
Eco-Worthy’s 200W solar panel kit is the perfect option for someone looking for a simple, cost-competitive solar kit for a small to medium-sized RV. The kit includes two monocrystalline solar panels, a 20 amp charge controller, mounting hardware, wiring to connect the solar panels to the controller, and two adapters to combine the two panels into a single wire.
Two hundred watts probably isn’t enough if you’ve got a larger RV or your energy use is high, but for smaller rigs, it’ll do just fine. If you do want to go up in size, the 20 amp controller can handle a total of 300W in 12-volt mode, so you can add additional panels down the road.
Unlike the cheapest controllers, this one has an LCD screen to tell you your system’s voltage, battery charge, and energy production status, as well as two USB ports to charge your smartphone or iPad without an inverter, a thoughtful feature that could come in handy in a pinch.
You’ll need to buy a battery and inverter, as well as the additional wiring. Since the controller is a PWM controller, you’re limited to lead-acid batteries, as PWM controllers can’t handle lithium-ion. Still, at the kit’s low cost it’s not a bad deal.
Unfortunately, there aren’t enough reviews of the kit to be helpful, but what’s there is good and Eco-Worthy’s other products are well-reviewed, so we don’t think there’s anything to really worry about.
The only issue any reviewer mentioned is that the kit doesn’t include instructions, though they did say that installation was quite easy. It’s certainly an annoyance, but in our minds, not a deal-breaker at this price.
Bottom Line: Eco-Worthy’s 200 W Solar Panel Kit is a great deal for small RVs. For the same price, you could buy two solar panels individually, you’re also getting mounting hardware, wiring, adapters, and a charge controller.
It’s a simple kit that should be very easy to install in your RV, especially if you’ve already got an inverter and battery in place – just make sure that the battery is lead-acid, not lithium-ion!
As mentioned above, Renogy is the biggest name in small-scale solar for RVs, campers, boats, and cabins. The Renogy 400W Solar Starter Kit is a great option if you’re looking for a larger solar solution for your RV. With four 100W panels and the hardware to attach each one individually to your roof, you can play Tetris up there to fit all of them.
The kit also comes with Renogy’s Adventurer 30 amp charge controller, wiring (solar panel to controller and controller to battery), and MC4 branch connectors (for your solar panels).
The 30 amp Adventurer is a PWM controller, so it’s not safe to use with lithium-ion batteries. If you’ve already got a lithium battery, or plan on buying one, upgrade your Wanderer to Renogy’s 40 amp Rover MPPT controller for a couple of hundred bucks more.
Buyers continually give this Renogy kit excellent reviews, noting each component is high-quality and the kit is very easy to install. The only real downside that numerous users noted is that, unless you have all your panels installed in a row, the wires aren’t long enough to reach all of them. If you want to spread out your panels, you may have to purchase some extra wiring.
Bottom Line: There’s not too much to say on this solar panel kit. It’s affordable, comes with high-quality components, and customers love it. If you’re looking for a larger solar kit for your RV, you can’t go wrong with this one. If you want a lithium-ion battery though, you’ll have to upgrade to the much more expensive MPPT controller.
Best Solar Panel Kits for Sheds and Outbuildings
Solar panel kits for sheds aren’t necessarily larger than RV kits, but since the kits aren’t designed for use in a cramped RV, size and weight isn’t as much of an issue. As such, kits in this category can include larger inverters, larger charge controllers, and wall-mounted combiner boxes that are simply too big and awkward for RVs.
One of the kits below also doesn’t include mounting equipment. As opposed to the cheap, simple brackets we all use to attach solar panels to RVs, solar panels for sheds or cabins can be either roof or ground-mounted. This means that many larger solar panel kits don’t include mounting hardware. Make sure you know what’s included before purchasing!
Grape Solar’s 400 watt Solar Panel Kit is the perfect solution for a shed or small cabin. It comes with four 100W panels, an 1800 watt pure sine wave inverter, a 35 amp charge controller, and the wires to connect the solar panels to the charger and the controller to the battery. The only thing you need to bring is a 12V battery and the mounting hardware.
The 35 amp charger controller is large enough to safely add one more 100W panel, for a grand total of 500W. However, like the other controllers above, it’s a PWM controller, not an MPPT, so you can’t add a lithium battery, only lead-acid. However, PWM controllers are cheaper, so there’s certainly a balance of performance and cost going on.
The included inverter is also a good piece of equipment. At 1800W, the inverter that comes with the kit is large enough to charge all your gadgets at the same time. It’s also powerful enough for a blender or hairdryer, but possibly not at the same time.
The inverter includes two 3-prong outlets and a USB outlet. It’s also a pure sine wave inverter which means it can power more sensitive electronics like some CPAP machines, power tools, and some laptops.
Grape Solar makes quality solar components and this kit is no exception. Many buyers are using it for their off-grid cabins and tiny homes with reliable results. Customer service is stellar, with friendly staff that is actually knowledgeable on the finer points of their technology.
Bottom Line: If you’ve got a shed or a small cabin that only needs around 400W of solar power, Grape Solar’s kit is the perfect solution. It’s low-priced with quality components. Just don’t forget to buy the battery and mounting hardware.
The Eco-Worthy 800 watt solar panel kit comes with eight 100W solar panels and mounting hardware, a charge controller, an inverter, and a locking PV combiner box to combine all the solar panels together and only run a single positive and negative wire to the controller.
First off, let’s start with the bad. Customers complain that the directions included with the kit – if Eco-Worthy remembers to send them – are very confusing, so you’ll have to do the research yourself on how and where to install the solar panels.
Second, while the product image shows wire to connect the combiner box to the charge controller, numerous customers have reported not receiving it, while other customers do get it. It seems like it’s a coin toss.
Lastly, a few customers have noted that the 60 amp charge controller is somewhat flimsy, so best to install it and leave it.
Even with those negatives, the Eco-Worthy 800 Watt Solar Panel Kit remains a great choice for sheds or small cabins with fridges or other appliances. It comes in around $500 less than similarly-sized kits and includes a pure sine wave inverter designed for off-grid systems. As opposed to cheaper modified sine wave inverters, pure sine wave inverters can power any and all electrical gadgets – including sensitive appliances like CPAPs and power tools.
The inverter itself is designed to convert 24V DC electricity to 110V AC and can handle 3,000W of continuous power and 6,000W spikes (as appliances can use double or even triple their labeled wattage for a split second when turning on).
The 6-string combiner box is also a nice touch that other kits don’t include. Remember this system is designed for 24V, so be sure to have an adequate battery bank.
At this low price point, there are bound to be a few issues, like we’ve mentioned above. But overall, customers dig the product and appreciate the low cost and simplicity of the system.
Bottom Line: A low-cost option for a shed or small cabin, but make sure your Eco-Worthy kit includes everything you need!
What Do Solar Panel Kits Include?
All solar panel kits come with, at the very least:
- Solar panels, to create the electricity.
- Charge controller (for off-grid systems), which goes between the solar panels and battery, to protect the battery from over and undercharging.
- Wiring, to connect the solar panels to the charge controller.
Some also include:
- Mounting hardware to connect solar panels to the roof.
- Wiring to go from the charge controller to the battery and from the battery to the inverter.
- Fuses to protect all the wiring.
- Inverter, to convert the battery’s DC electricity to AC electricity for all our gadgets and appliances.
Take a look at the kits you’re interested in to see what’s included. If it doesn’t include any of the above, you’ll have to buy them separately, which isn’t a huge deal, since multiple options for each piece of equipment above can easily be found on Amazon.
If you’re looking to install an off-grid solar installation, you’ll have to buy a battery separately, as none of the kits above comes with one.
To help you with your installation, your kit usually includes a manual that describes the installation process as well as what equipment you’ll need to complete your installation and even recommendations on battery type and size.
Off-Grid vs Grid-Connected Kits
Almost all solar panel kits are designed for off-grid use. In other words, the kit will never connect to the utility infrastructure – it’s completely independent. Good examples of off-grid installations include solar in RVs and camper vans, backyard sheds (if not connected to the home’s electricity), and off-grid mountain cabins.
Choosing between an off-grid and grid-connected system is usually pretty easy, as your situation dictates your needs. If you’re wanting to add solar to your grid-connected home, you’ll need a solar panel kit designed for grid use. If you’re adding solar to your RV or far-away mountain cabin, you’ll want a solar panel kit designed for off-grid use.
Are Solar Panel Kits Easy To Install?
All of the small solar power kits that we reviewed above are simple and easy to install. Information abounds about installation practices, sizing your system and battery, and safety concerns.
With a little research and a few hand tools, anyone can safely and competently install these small solar kits. If you’re worried about whether you have the skills or ability to install the kit yourself, there are many solar professionals out there who would be happy to help you.
As you go up in size, say 1,000W or more, solar installations become more complicated. Not just in the wiring and electrical components, but also in the physical installation.
How do you safely attach a few hundred pounds of solar panels and equipment to your roof? What about sealing the lag bolts from water leaks? Is ice damming a bigger issue with solar panels? You need to be able to answer all these questions and a hundred more when installing solar on your home.
If your home is grid-tied, like most homes in the US, you’ve got even more questions to answer. Does your utility allow self-installed solar installations to connect to the grid? Spoiler: Many do not. Can you provide your local building department the necessary electrical diagrams and structural information? What size electrical conduit do you need to run the wires from your roof to the inverter?
Even after all this, most jurisdictions only allow licensed electricians to actually work in your electrical panel, so you’ll have to hire an electrician to connect your installation to your home’s panel.
For most of us ‘regular’ people, it doesn’t make sense to install a large solar installation ourselves. We lack the knowledge and skills to install an entire solar installation safely. Small kits are one thing, but if you want a large, grid-tied solar system on your roof, it’s probably better to simply hire an installer.
Can I Save Money By Installing The Kit Myself?
Installing any equipment yourself usually allows you to enjoy a lower overall cost. Most of the kits above cost about $1.50 to $2 per watt. Hiring a solar company to install a solar system costs about $3 per watt, so you could save 33% to 50% by installing it yourself.
If you’re looking to install solar on your detached shed or garage, installing your own solar panel kit has the potential to save you quite a bit of money, as running electrical lines from your house to a separate structure isn’t cheap. Instead, you can simply install solar yourself and keep much of that cash in your pocket.
The only time that installing a solar kit yourself may not be the best choice is when you’re looking to install a large grid-connected solar system. As you now know, these kits can become quite involved and usually require professional installation.
How To Get The Most Out of Your Solar Kit
Thankfully, modern solar kits are pretty self-sufficient. If you buy a quality kit, the system should be nearly maintenance-free, but there are a few things you can do to ensure that you get the most out of your kit.
The most important thing you can do is keep your solar panels clean and free of debris. Solar panels can only work if sunlight can get through the glass front panel and the more sunlight the better. Dust, dirt, leaves, and other obstructions can keep your solar panel from performing at its best.
How often you should clean your panels depends on where you live. If you live in a desert area with a lot of dust, you may have to clean the panels as much as once a week. In other areas, once a month may be enough. The important thing is to check them periodically.
Never use anything abrasive to clean the panels because it could scratch the glass, making it cloudy and hard for light to get through. Use a soft cloth and gentle cleaner to ensure that you don’t damage the panels.
Another way to ensure that you’re getting the most out of your panels is to check the power output periodically. Most charge controllers will have a digital display that allows you to view your panels’ output in real-time. If you check this often, you’ll know what to expect and whether or not your system is working correctly. The sooner you notice a discrepancy, the sooner you can address the issue.
Most solar panels come with long warranties, between 10 and 25 years, so you shouldn’t have to worry about much, but it’s always good to know that things are working as they should.
We hope you’ve found our mini-guide to solar panel kits helpful! We’ve covered a lot of information here, so let’s look back at our top picks for solar panel kits one last time:
Like we mentioned before, small solar panel kits are great for RVs and sheds, but if you want to run your entire home on the sun’s energy, hiring an installer is still the best option. Costs are falling each year, and by hiring an installer, you have the knowledge that your system is installed safely and lawfully. Check out some of the best solar panels and best solar installation companies if you want to get a full-sized solar system for your house.
Of course, not all installers offer great service, so do your research and get estimates from a few different companies to compare costs and customer experience. Estimates are always free and the best companies aren’t pushy at all. The financial savings of installing solar typically sells itself, and the best installers know that no pushy sales tactics are required.
Until you’re ready to go full-on solar, solar panel kits are an easy way to get your RV or cabin running on clean, renewable energy, so get on it!
We hope you’ve found our guide to solar panel kits helpful! Here’s one last look at our picks:
Compare the Best Solar Panel Kits for 2021
- Best for a Home
- Best for a RV
- Best for Sheds and Small Buildings
Image Credit: CC license via Flickr