Rosendin Electric and Ampt offer inverter repowering of PV power plants
Rosendin Electric and Ampt have announced the availability of a new offering to repower large-scale solar photovoltaic (PV) systems that are underperforming or that require inverter replacement. The solution uses Ampt String Optimizers to improve power plant performance and increase return on investment. To learn more about Ampt, visit their booth at Intersolar North America – July 11-13, 2017.
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As PV power plants age, many inverters experience significant faults and downtime, or fail after reaching their expected operating life. Often the original model inverter is either expensive and inefficient compared to modern inverters or is no longer available. In the past, this has caused substantial reworking of the system, or portions of the PV plant to remain offline.
Ampt String Optimizers are DC-to-DC converters that put dual maximum power point trackers (MPPTs) on each string of PV modules to improve the system’s lifetime performance. Ampt’s patented technology is claimed to recover approximately 60% of energy losses caused by the electrical imbalances which occur as systems degrade. When used to repower existing PV systems, Ampt optimizers are connected to the existing wires and combiners and include optional wireless communication for remote monitoring and enhanced OM.
Rosendin Electric‘s repowering service includes a performance assessment, engineering, installation of Ampt String Optimizers, and re-commissioning of the system. Full-service operations and maintenance (OM) support is also available to customers.
Ampt optimizers allow 1000-volt inverters to deliver full rated output power in 600-volt systems. Likewise, 1500-volt inverters achieve full rated output power in 1000-volt systems with Ampt. The result is a lower cost per watt inverter utilizing modern technology and a higher performing PV array. Ampt optimizers are also used to expand systems by adding more PV modules to the existing inverters while operating within specification. Ampt enables these “high DC ratio” systems to operate at DC/AC ratios of 2-to-1 or more to generate up to 70% more energy. Rosendin Electric provides the know-how and EPC services to customers to deploy high DC ratio systems using Ampt to maximize ROI.
July 2017, onwards in the US.
Rosendin Electric to Install 6.6 Million Solar Canopies at Castro Valley Schools
A company that helped develop the Santa Clara Valley after World War II will install solar power canopies at three schools in Castro Valley, if the school board ratifies a 6.617 million agreement on Thursday.
The canopies would be installed in existing parking lots with attached photovoltaic systems to provide electrical power at. and.
Find out what’s happening in Castro Valley with free, real-time updates from Patch.
Rosendin Electric Inc., now a national contractor, has installed solar power across the state, including at the San Jose International Airport.
The school intends to pay for the project with COPS, or Certificates of Participation, a financing alternative to a school bond measure. COPS are tax-exempt government securities used to raise funds for capital investments. An advantage is that payments can be spread over time.
Find out what’s happening in Castro Valley with free, real-time updates from Patch.
The Castro Valley Unified School District expects to save 100,000 a year in PGE costs once the project is operational, according to a staff report in the Aug. 25 school board agenda.
The work would begin in December and end in June, assistant superintendent Mike Bush said at the Aug. 25 meeting.
Also on this Thursday’s school board agenda:
- Donation from. a community group raising funds to offset for Castro Valley schools alone over the past three years.
- Report on STAR testing. To see results, previously reported in Castro Valley Patch, click here.
- Declaration of October as Disabilities Awareness Month, Character Education Month and National Principals Month, on pages 47-54 of the agenda packet.
- Report on developer fees, 80,000 received and spent in 2010-11, as detailed on pages 57 and 58 of the agenda packet. The district collects up to 5000.97 per square foot from developers of residential, commercial and industrial construction in Castro Valley.
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Once completed, the combined 450MWac Athos I and Athos II solar installations will provide the capacity to generate over 2,200 GWh per year of renewable energy, enough to power 179,000 homes and offset 1.7 million tons of carbon dioxide emissions annually.
- Athos I will have the capacity to generate up to 361-Megawatts (DC) as early as March 2022 (SB Energy has a Power Purchase Agreement to sell the energy to Direct Energy Business).
- Athos II will have a 288-Megawatt (DC) capacity when completed around November 2021. (It has a contract to sell long-term renewable energy credits and output to an unnamed company when completed around November 2021.)
“Rosendin collaborated with SB Energy on this project for over a year, and we’re thrilled to be constructing the facility as the next phase of this partnership. The extensive design planning process ensured we could exceed system performance and long-term reliability while maximizing construction efficiencies and minimizing upfront capital expenditures.“
David Lincoln, Senior Vice President, Rosendin Renewable Energy Group
“Our collaborated approach was the deciding factor for SB Energy in selecting the REG team as our turn-key design-build EPC for the Athos I II projects. Rosendin’s strong presence in California with the ability to attract union labor, as well as self performs of low, medium, and high voltage substation and transmission work, and the overall competitive advantages in the full spectrum of EPC made them the obvious choice as our key partner to build the project. We believe we can build a long-lasting partnership starting from these two projects.”
Abhijeet Sathe, co-CEO of SB Energy
Rosendin’s REG collaborates with developer and independent power producer clients early in the project development cycle to provide best-in-class solutions that meet the ever-evolving challenges of the utility-scale solar industry.
“Given the overall complexity of the project development cycle here in California, working between three vested agency authorities and the site’s unique preconstruction design and engineering challenges, the SBE/Rosendin team embraced key aspects of Integrated Project Delivery management philosophy. By involving all stakeholders across the full spectrum of the permitting process, subcontracted scopes of work, supply chain providers, and our IBEW labor team, early on in planning process, we have assured the high level of accountability and ownership of responsibilities required to make this project a huge success.”
Rick Gonzales, Division Manager overseeing the Athos projects’ work
Athos is one of the largest renewable energy projects in California, incorporating 1.48 million First Solar Series 6™ photovoltaic (PV) modules on a 3,440-acre land parcel, located approximately 75 miles east of Palm Springs in a small town called Desert Center.
Rosendin will utilize over 400 employees and union contractors with the International Brotherhood of Electrical Workers (IBEW) to construct the project, following all COVID-19 safety protocols.
“Like so many other industries, construction has suffered during the pandemic. Our partners at Rosendin have been exceptional in keeping job sites safe so our members can continue building our nation’s infrastructure. We have complete confidence in their leadership.”
Jim Rush, IBEW Local 440 Business Manager
One of the fastest-growing renewable energy groups in the country, Rosendin’s REG is building a robust workforce through the active recruitment of experienced engineers, estimators, and project managers. Rosendin offers a sustainable and productive career path for industry professionals who want to make a difference. As an innovative company dedicated to inclusivity and equity, Rosendin offers a wide range of opportunities for growth potential to qualified professionals.
Riverside County Project Covers Nearly 5 Square Miles
About SB Energy Corp:
SB Energy, a wholly owned subsidiary of SoftBank Group Corp., is a leading utility scale solar, energy storage, and technology platform. We develop, construct, and own and operate some of the largest and most technically advanced renewable projects across the United States. SB Energy’s mission is to provide flexible renewable energy at scale, accelerating the global energy transition and benefiting our planet, customers, communities, and people. For more information, visit http://www.sbenergy.com
About Rosendin Energy Group:
Rosendin’s Renewable Energy Group (REG) is a division of Rosendin and a true EPC, providing renewable energy design planning, construction and serving for solar and wind energy projects. Rosendin’s REG also provides innovative battery energy storage systems and sustainable power solutions to support the emerging microgrid market. REG has installed nearly 4GW of Solar and 22GW of Wind Energy throughout the U.S. and offers a comprehensive portfolio of construction services including design-build, substation and switchyard installation, vertical tower wiring, overhead collection systems and transmission lines, underground collection systems, and substation design and communications integration. https://www.rosendin.com/sectors/renewable-energy/