It's going to be a big year forsolararound the world. 

The global solar market grew by 26 percent last year, with 99 gigawatts of grid-connected PV capacity installed. According to GTM Research’s new Global Solar Data Hub, 2018 will be the first-ever triple-digit year for the global solar market, with an anticipated 106 gigawatts of PV coming online.

Amid all of that growth, several notable shifts are expected to take place. The solar analysts at GTM Research have highlighted 10 trends that will shape the solar market in 2018.

Global solar tenders continue to proliferate

GTM Research counts 53 national markets where a tendering or auction scheme is currently in place, up from 32 in the second half of 2016. Furthermore, there are an additional 29 national markets where a tendering or auction scheme has been discussed or planned.



Source: GTM Research Data Hub

Senior Analyst Tom Heggarty notes that more than 3 gigawatts' worth of solar tenders will be announced in the first quarter of 2018 alone.
 

The global market is diversifying, but large countries still dominate

China, the U.S., India and Japan will continue to dominate demand in 2018, but their share of overall global market will shrink from 82 percent in 2017 to 72 percent in 2018. The number of countries installing 1 gigawatt or more annually will grow from nine to 14 over the course of these two years. 


Source: GTM Research Global Downstream Solar Service

The five countries poised to cross the 1-gigawatt annual threshold for the first time in 2018 are Brazil, Egypt, Mexico, the Netherlands and Spain.
 

The U.S. is diversifying, too

New data from GTM Research shows that 18 U.S. states will install 1 gigawatt or more of PV between 2018 and 2022.



Source: GTM Research 

Combined, these states will account for 80 percent of U.S. installations during the same time period.
 

PV continues to compete with (and beat) coal and natural gas

According to GTM Research’s Global Solar Demand Monitor, recent bids are pushing average PPA tariffs past the cost-competitive range with coal and gas.



“It is important to note that nearly all global low-bid projects have long lead times and are still unbuilt and unproven,” said GTM Research Solar Analyst Ben Attia. “Three to five years is an eternity in the solar space. It remains to be seen how market and country-level risks will erode the tendered pipelines.”
 

A bumpy road for module supply

The excess capacity ratio is the ratio between available capacity and demand. GTM Research defines a healthy solar module ECR range as one that falls between 30 and 60 percent. When the ECR is within this range, module prices are more likely to decline at stable rates. When ECR exceeds this range, the market is oversupplied and prices are expected to decline at more rapid rates.

Looking toward 2018, GTM Research is forecasting supply-demand tightness in the first half of 2018 and an oversupplied environment in the second half. This means there is risk that prices will increase in the first half of the year and depreciate rapidly in the final six months.


Source: GTM Research PV Module Service

Senior Analyst Jade Jones notes that price appreciation in the first half of the year may be limited as suppliers clear excess inventory in the supply chain. But some regional module prices may be stable or even up around April as module demand in China picks up before another round of feed-in tariff cuts.
 

Balance-of-system costs will be an important cost-reduction driver

In 2018, balance-of-system costs will account for the largest share of utility-scale PV project costs. GTM Research Solar Analyst Rishab Shrestha notes that efficiency improvements, higher-wattage modules, and 1,500-volt systems will provide BOS cost savings, in addition to hardware cost reductions, helping solar to compete against other sources of generation in markets around the globe.


Source: GTM Research Global Downstream Service
 

Module-level power electronics outpace centralized and string inverters

Microinverters and DC optimizers only make up a fraction of the overall inverter market today, but growing distributed generation markets and a heightened focus on safety will result in the continued proliferation of these technologies.


Source: GTM Research PV Systems & Technologies Service
 

U.S. residential solar pricing is the highest in the world

Despite falling prices globally, residential solar system pricing is higher in the U.S. than in any other major Organisation for Economic Co-Operation and Development (OECD) solar market.


Source: GTM Research PV Systems & Technologies Service

Within the U.S., pricing varies significantly by state. According to GTM Research’s Ben Gallagher, “variations in hardware costs, wages, taxes, permitting and market fundamentals produce as much as a 68 cents per watt difference in pricing between states.”


Source: GTM Research PV Systems & Technologies Service

Companies will continue to look for ways to reduce customer-acquisition costs, and even more so now due to the recent Section 201 decision on tariffs.
 

Storage continues to be integrated into solar projects

Public Service Company of Colorado (an Xcel Energy subsidiary) launched an all-source solicitation in 2017 as a component of its 2016 Electric Resource Plan. While the bids haven’t yet been evaluated, the released details provide a window into the future of utility resource planning.

"Over 350 of the bids (83 percent) were for renewables or renewables paired with storage," states GTM Research's Ravi Manghani in a report on the topic. "In terms of megawatts, [renewables represent] an even more astonishing 91 percent of all proposed projects."


Source: GTM Research Energy Storage Service, Xcel

"These bids highlight utilities' interest in solar-plus-storage, and they provide a real-world benchmark for how price-competitive these systems are," said GTM Research Senior Analyst Dan Finn-Foley.
 

Tariffs damper U.S. solar market

According to an analysis by GTM Research, the tariffs on imported solar cells and modules set forth by the Trump administration will result in an 11 percent decrease in U.S. solar PV installations over the next five years. This represents a reduction of 7.6 gigawatts of installed solar PV capacity between 2018 and 2022 versus previous forecasts.


Source: U.S. Solar Outlook: Initial Reactions to Section 201 Decision

Projects under construction or with modules already in inventory will temper the impact on 2018 installations, with the effect of tariffs hitting the downstream market more heavily in 2019. According to GTM Research, the utility-scale solar segment will be more heavily affected than the residential and commercial solar segments, taking 65 percent of the expected 7.6 gigawatts of reductions over the next five years.

“The overall effect is a meaningful but not destructive reduction to expected solar installations, along with with modest improvements to a still-challenging environment for domestic solar cell and module manufacturing,” said MJ Shiao, GTM Research’s head of Americas.

Despite some speed bumps, GTM Research anticipates the global solar market to eclipse the cumulative 500-gigawatt mark in the second half of 2018.
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