We're On Call 24/7
Mon – Fri 7:00am to 4:00pm
Get a Quote On Our Services
Solar panels or solar modules (which are normally installed on the roof) are made up of photovoltaic (PV) cells, and those cells convert sunlight into direct current power. The power then goes through an inverter to be flipped to Alternating Current (AC) power. From there, it goes into your main electrical panel and powers everything in your home.
If your solar power system is producing more than necessary, the meter will spin backward, which will allow you to accumulate credit with your utility company towards your next bill. Learn more about HOW SOLAR WORKS.
A solar panel is two sheets of silicon solar cells connected by bus bars encased in glass often surrounded by an aluminium frame, but that doesn’t mean all solar panels are created equal. The grade of the silicon and the wattage of the panels as well as how those cells are assembled all matter when it comes to lifetime power output and reliability.
Mono or polycrystalline
All solar panels are made from silicon crystals. In a polycrystalline panel, each of the wafers used to make the solar cells is composed of multiple silicon crystals. The process used to make the silicon ingots is a bit like the one used to make particle board in construction. A single crystal seed is placed in a vat with lots of chunks of silicon and it’s all melted together. Many crystals grow as it cools. It’s cheaper to make and creates less waste, but the borders where the crystals meet make for a slightly rougher surface which causes electricity to move around less efficiently. This type of panel has a 13-16% efficiency rating. It also has that typical blueish hue due to the composite nature.
For a monocrystalline panel, the silicon wafers are sliced from a single crystal, giving them a much more uniform surface which converts sunlight into power at a higher efficiency (15% to 22%+). Due to the purer nature of the silicon, monocrystalline panels have a dark black appearance. They are also perform better at higher temperatures – a big plus in our desert heat. Robco recommends high efficiency LG NeON 2 Mono Crystalline solar panels.
These days, most solar panels are at least 280 watts. That is the rated output of the panel under perfect test conditions. On your roof top though, the output will depend on which way the panels face, how much sun is hitting them, what angle they are tilted at, how much shade is present and how hot it is outside. When your solar installer is providing an annual power estimate, they are taking all these variables into account. Obviously higher wattage panels will produce more power over their lifetime then lower wattage panels even with these variables.
Silicon crystals break down over time. This is called degradation and it is a natural quality of the material so every single panel will lose a little bit of performance as it ages. It can be increased by environmental factors and stress to the module structure – like someone walking on your solar panels. Your power output in year 20 will be lower than it was in year 1. How much will it drop off and will you notice it? That really depends. Manufacturers guarantee that the typical solar panel will produce at least 80% of the day 1 power at Year 20, but manufacturers can reduce degradation in a number of ways from using more and thinner bus bars to the surface of the cells. Those technology advances mean that long term power production from panels is getting better and better and that you should not be concerned over degradation.
Go solar with the most experience local contractor in Las Vegas. Check out our reviews. You won’t go wrong hiring the best solar company in Las Vegas, Robco Electric.
We Specialize In
Commercial & Residential
The core of our business is our well-established Commercial Electrical Division. Robco specializes in Clark County School District projects, government projects, small and large tenant improvements along with medical and airport facilities.
Our solar team brings decades of hands on experience to the design and installation of your solar array. As solar experts, we are on a mission to educate Nevada communities on solar. We design, install, troubleshoot and maintain your system.
The focus of Robco’s low voltage division is to provide customers a wide range of services. Robco’s services include fire alarm systems, camera systems, access control, intrusion alarms, intercom/clock systems, voice/data systems along with interactive projector installations.
In NV, state law mandates that all solar installers offer a 10 year workmanship and roof penetration warranty. When you go solar, your roof warranty is voided, so this backstops and guarantees that you are protected. That leads to a question. If another company is...
Robco's operations in all divisions (Solar, Low Voltage, Commercial Electrical and Service Electrical) are still operating with appropriate precautions in light of the COVID-19 outbreak. We fall under construction as an essential business. If you are interested in a...
Downloading your power bill from NV Energy is easy! Just log in and follow these easy steps. Step 1: Log into your account at NV Energy. You'll need your user ID and password. If you do not have an account, you'll need to create one by choosing "Register a New...
Getting an Electric Vehicle? How many more solar panels will you need? How exciting! You've decided to buy an electric vehicle. You are going to love the silent, clean ride! So, how much more solar will you need to charge it? Well, that depends on how big your new...
Have you noticed that your Enlighten is no longer showing data? Your Envoy may need to be reset or reconnected to your wi-fi network. Click the link below for step-by-step instructions to get it talking again. https://enphase.com/en-us/support/envoy-offline If you...
There is a great neighborhood specific app called Nextdoor. It let's you chat with verified neighbors within about 2 miles of your home. Only the people who live in the area can see your neighborhood posts. Nextdoor just added the ability to recommend a business and...
At Robco, we believe in reducing demand as much as you can so that you can buy less equipment and get more offset from your system. This week we had a few conversations with customers about energy efficiency. They had older homes and pretty big power bills. Instead of...
When we look at a rooftop for solar, the goal is to replace as much of the customer's current power use with solar as we can. However, all installers must obey certain rules when designing solar PV systems. One of the most important considerations in design is to...
We had an incredible opportunity to help keep our first responders safe today. Captain Williamson with the Clark County Fire Department is having solar installed by Robco. He invited every Fire Captain and Battalion Chief in CCFD to come out to the install to...