Tag: pv wire

Making the Case for Prefabricated Solar PV Wire Solutions

Posted on by Gino Geruntino

Driving past a solar installation sometimes feels daunting. Arrays can have dozens of rows of panels, stretching on for what feels like miles. 

Not only are some solar energy projects massive, but they’re also complex. Companies have hundreds of variables to consider, and the process takes years from initial planning to completion. They also cost millions of dollars between installing solar panels, securing permits, doing tests, and paying employees. 

Solar EPCs always try to manage costs, reduce installation times, and produce better results. While hard costs like solar panels and PV wire have fallen over the years, soft costs like permitting, taxes, and labor haven’t shown the same decline. 

How can companies save money on soft costs? The answer may be found in the wire holding everything together. 

Small Cost, Massive Impact 

When we look at the total cost of a utility-scale solar energy system, PV wire is low on the list. 

However, choosing the right solar wire can save time and money on your solar project installation. For example, prefabricated wires have a higher upfront cost but slash installation times. 

So, how do bundled, prefabricated solutions make the most of their engineering to save time and money? It all comes down to ease of use, consistency, and automation. 

When combined, teams can shave hours and dollars off their projects without additional effort. 

Why Do Installers Choose Pre-Fab Solutions? 

Despite all the planning and effort, sometimes you get what you pay for. 

Using single PV cables for a rooftop solar system is fine, but they can slow a utility-scale project to a crawl. Bundled pre-fab cables remove constant trips up and down each row, replacing them with one pass. 

For the average project, not making multiple trips shaves hours off each row and days off a project. But beyond faster installations, why are solar companies choosing pre-fab wire products? 

Wires are Pre-Cut and Factory Assembled 

What is the difference between a pair of jeans purchased off the rack and a custom-tailored pair? 

Jeans from the store come in many sizes, but they only offer a general fit. Meanwhile, custom-tailored jeans are specifically manufactured to fit you and only you. The same concept applies to buying single wire reels versus pre-fab bundled wire. 

Manufacturers cut pre-fab bundled cable to specific lengths matching the project’s layout, preventing wasted wire. The manufacturer also properly installs connectors, performs quality control testing, adds labels, and mounts the cable to reels. 

Not only are the manufactured cables ready to install as soon as they reach the job site, but workers don’t have to cut, crimp, or install connectors themselves. 

Less Room for Mistakes 

Employees on the job site often have varying skill levels and experience. 

Small mistakes, like a loose connection, can have dangerous implications. Fires, arcs, and shorts may cause severe damage and cost hundreds of thousands of dollars to repair or replace. 

Factory testing eliminates many issues before installation occurs. The manufacturer is also much more consistent than multiple workers on the job site. 

The other thing installers like about pre-fab wire solutions is the exact measurements used to cut each wire to length. Single wire reels often create waste during installation. Despite the higher cost, pre-fab solutions limit scrap and speed up installs because workers can immediately use them. 

Building on Labor Savings 

Pre-fab solar power cables help workers make fewer mistakes, but do they make installers faster?  
 
Instead of walking cables one at a time down the row to each solar panel, installers make one trip with all the cables. Once they reach the end of the row, they walk back down and connect each wire in the bundle to its corresponding panel. Customers can have cables marked as well, further reducing accidents and miscommunication. 

Pre-fab solutions, including bundled wire, limit opportunities for mistakes. The faster speeds also reduce labor costs dramatically, sometimes by as much as 80%.

Besides allowing works to move more swiftly on the worksite, pre-fab solutions also make solar installation teams more efficient. In many states, including those across the Northeast, solar projects ramp up in the spring and slow down toward the end of fall for the winter season. The ebb and flow of project seasonality, which is a challenge for many solar companies. 
 
When teams are using pre-fab bundled wire, projects are completed more quickly with fewer people. In turn, crews can work on more jobs during the busy season, and companies benefit from better labor allocation and shorter ramp-up and ramp-down times. 

Safer Installs 

Prefabricated PV wires are easier to work with, simplifying the job. 

Think about field-made connectors for a second. Depending on the workers’ experience, they could make mistakes as they strip, crimp, and attach connectors to the wires. While issues may not appear immediately, they could develop over the long term, limiting power generation. 

Bundled solutions remove the guesswork from the installation process. Workers only attach the connectors to the panels and the combiner box to power the system. 

Beyond being easy to use, prefabricated bundled wire is also cleaner, as there’s only one bundle of wires to worry about. The result is an organized installation with fewer mix-ups and nicer-looking outcomes free of tangled wire. 

Short- and Long-Term Savings 

Pre-fab wire solutions like bundled cable cost more than single cable options but save time and money on labor. 

Single wire reels work for small residential solar panel systems but bog down larger projects, like utility and community solar. Running single-wire reels is inefficient, more error-prone, and opens the door for waste. 

Combining the wires for a row together shortens installation times and gets workers on and off the site faster. Best yet, potential savings increase as the projects get bigger. 

Bundled Wire Leads to Better Installs 

The United States relies on clean energy more than ever, so investing in solar improvements is critical. 

Solar array technology has improved dramatically, from bifacial panels and tracking systems to more effective connectors and accessories. The same can be said for PV wire, too. 

Bundled PV wire solutions allow employees to do better work faster. Solar installations can then produce energy sooner, leading to lower electric bills for communities and businesses. 

That’s good news for everyone.

How Are PV Jumpers and PV Adapters Used in Solar Systems?

Posted on by Gino Geruntino

When you think about the parts of a solar array, PV jumpers and adapters probably aren’t the first things that come to mind. 

That’s because solar arrays are complex projects relying on thousands of small, often unheralded pieces coming together to produce electricity. Unlike readily seen parts like the panels and racking, jumpers and adapters seem like an afterthought until you need them. 

Despite their small size, PV jumper cables and adapters have a gigantic role in keeping the system working well. Often going unnoticed, they ensure power moves seamlessly from the panels to the combiner box and eventually the grid.

The Low-Down on Solar Jumper Cables 

Solar jumper wire works similarly to jumper cables for cars, transferring electricity from one solar panel to another. 

These short lengths of PV wire have MC4 (or site-specific) connectors on both ends and connect solar panels together along a row. Their job is to connect solar panels to one another, usually the positive and negative terminals on neighboring panels.  

When fully connected, extension cables connect panels into a parallel system to create a series of panels. They also allow more streamlined installations to move power from the panels to the larger electrical grid. 

Jumpers also have a purpose outside community- and utility-scale solar installations. Residential direct current (DC) solar systems use them as a home run to the inverter box and to connect devices through optimizers and micro inverters.  

Made to Order 

Depending on the system, manufacturers can custom-make PV jumper wire to fit specific site demands. 

Although workers in the field can make their own jumpers, it’s tough to ensure quality is the same across the board. Manufacturers remove the guesswork, ensuring every cable is consistent and quality-checked before arriving at the job site. 

The result is a faster installation with fewer mistakes because workers aren’t cutting, crimping, or fitting connectors. 

What are PV Adapters? 

MC4s are among the most common connectors used on solar installations but aren’t the only ones workers may see. 

If the site is older, you may come across older MC3 connectors. MC3 connectors were widely used in the early and mid-2000s but fell out of favor because they didn’t have locking mechanisms. Without a locking mechanism, the connectors could disconnect, resulting in lost power and potentially dangerous situations. 

Other sites may not have connector requirements specified. Companies may try to find cost-effective connectors like MC4s but with subtle differences. 

Solar adapters are critical to unifying the entire site when connectors must be uniform. PV adapters have different connectors on each end, letting workers quickly convert from one connector type to another. 

The wires allow workers to avoid tearing out thousands of feet of wire, replacing countless connectors in the field, or sacrificing power generation. Sites also maintain continuity throughout the installation, limiting the risk of faulty connections or lost power. 

Steady Flows and Time Savings 

Although they’re easy to overlook, prefabricated solar assemblies like PV jumpers and adapters keep solar arrays operating smoothly. 

Jumpers connect individual panels to maintain steady power flows from the panels to the greater system. Meanwhile, adapters ensure every connector is the same across the site to maintain continuity. 

Both save time and money on the job site and ensure the system works as well as it should. Without them, installations and retrofits would be a time-consuming nightmare, leaving the door open for potential site problems. 

When it’s often said the whole is greater than the sum of its parts, these two cables do a pretty good job of keeping solar sites running at peak power.

What Are the Soft Costs of Utility-Scale Solar? 

Posted on by Mike Zimm

If you’ve followed the solar energy trend with any interest over the past 10 years, you’ve likely seen a few massive changes in utility-scale solar operations. 

As solar panel technology improves, one question remains: is solar energy becoming cost-effective enough to displace fossil fuels? The answer to that question is a resounding yes, but we can do more to improve costs and expand the solar industry’s reach in the United States. 

While hard costs tied to utility-scale solar power have dropped considerably since 2012, soft costs haven’t seen the same changes. As the price of panels, PV wire, and the overall solar BoS decrease, the money spent on permitting, inspections, and operations become a larger piece of the pie. 

Luckily, many experts believe soft costs can fall with some additional investments, training, and standardization. 

Breaking Down How Utility-Scale Solar Costs Shake Out 

Whenever a solar project gets underway, there are two expense types that the utility needs to keep in mind; hard costs and soft costs. 

Solar Hard Costs 

Hard costs are budgeted into the account, and their prices tend to be fixed. Items that fall into this category are the parts and pieces needed to actually get the solar array up and running, including: 

  • solar modules 
  • inverters 
  • racking and other panel mounting systems 
  • Photovoltaic (PV) wiring 
  • energy storage 

Though it’s safe to say these costs can be counted on to stay in a determined range, higher quality products may come with short-term and long-term savings that could affect soft costs down the line. For example, Sun-Pull’s bundled PV wire can drastically reduce installation time and labor expenses, cutting overall project costs. Over the past decade or so, hard costs have fallen by about 60%. 

However, supply chain issues caused by the pandemic and our subsequent recovery have pushed prices slightly since 2020. 

Solar Soft Costs 

These cover everything else that isn’t a physical part of the solar installation. In the case of a solar installation, a breakdown of soft costs includes: 

  • installation labor 
  • permits and taxes (including sales tax) 
  • sales promotions and new customer acquisition 
  • administrative, marketing, and other overhead expenses 
  • operations 
  • supply chain expenses 

Unlike hard costs, which are somewhat predictable, soft costs are tied to several factors. These could include permitting and inspection fees, hiring and training new workers, money spent on community programs and educational materials, marketing programs to acquire and maintain customers, software, and more. 

Though soft costs have fallen, they have not had nearly the same drop as hard costs. Product prices tend to react more favorably in the face of more available options, better technology, and fewer restrictions. 

Cutting Down on Soft Expenses 

In 2017, the National Renewable Energy Laboratory (NREL) suggested soft costs made up more than 40% of a utility-scale system’s costs. Unfortunately, though overall prices have kept falling, soft costs are still about 36% of total utility solar expenses in 2021. 

If prices are high here, they must be high everywhere, right? Not so much. Utility-scale PV soft costs in the U.S. are still higher than those of other countries with developed solar markets, partially due to a lack of combined efforts. 

There is hope, however. The Department of Energy (DoE) says they can be mitigated with a few changes to get everyone on the same page. This includes standardizing codes and providing more educational opportunities for permit issuers, real estate professionals, and others in nearby industries. It also includes creating more effective integration strategies that make it easier to connect solar arrays to the overall electrical grid. 

Part of the current issue is that plenty of money has been spent to create technology that reduces hard costs but isn’t always applied to reducing soft costs. As with any solution, getting from where we are now to where we’d like to be will involve a few investments. 

Utility-Scale Solar PV Systems Can Benefit from Lower Costs 

The solar industry isn’t alone in its fight to make utility-scale solar more affordable. It will take a concerted effort from the government, private companies, and social organizations to complete. 

It requires the government to reduce the red tape associated with permitting and inspections. Companies need to look for organizational savings wherever possible, including software platforms that streamline operations and simplify processes where possible. Even variable expenses like marketing, attracting new customers, staffing, maintenance, and insurance offer opportunities to reduce overhead. 

The goal should be to make utility-scale solar energy and other renewables accessible to more people. To accomplish it, we must do our part to keep installation costs down and encourage investment.