Jordan A. Davis No Comments

Solar-Plus-Storage Cost Drivers

Solar-Plus-Storage Cost Drivers

According to GTM Research, last year less than one-tenth of one percent of solar PV installations included battery storage. These stats may suggest that the market isn’t ready for storage yet, but the reality could not be more different.

Early visionaries and advocates for the solar-plus-storage combination have generated a high level of industry attention and activity. The result is that users looking to augment their PV systems for better performance and value are signing on as technologies improve and costs fall.

One reason for this heightened interest is the rapidly declining costs of not only batteries, but of the entire solar-plus-storage system. Balance of system (BOS) components are relatively mature and suppliers are leveraging advanced materials and efficiencies in production and supply chains to keep costs down. Energy storage inverters, including solar plus storage inverters, from Dynapower, for example, are third-generation technologies that, like many high-tech products, offer increasingly superior capabilities and performance at very competitive prices.

A closer look reveals that costs for storage-plus-solar systems are also driven by the applications they’re used for. In low C-rate (high-energy, longer-duration) applications, batteries dominate the cost, increasing total project cost. On the other hand, in high C-rate applications, such as frequency regulation, peak shaving and other services, the cost for batteries is relatively small in proportion to BOS, resulting in a lower cost system.

The high and low C-rate cost breakdown is illustrated here:

A bar chart comparing the costs of a 2C and 0.5C solar plus storage projects.

Comparison of solar plus storage project costs at 2C and 0.5C for microgrid and grid tied applications.

The variable in this equation is the energy storage integration/EMS software. Pricing for this system element varies based on the complexity of the job – and is relatively independent from project size.

The solar plus storage market is growing – but what’s driving it?

GTM Research reported that solar-plus-storage deployments totaled 4 MW (DC) in 2014, but are expected to grow more than six-fold to 22 MW in 2015. By 2020, solar-plus-storage installations are projected to reach an astonishing 769 MW – nearly 200 times last year’s total. California is expected to be the biggest solar-plus-storage market, with 422 MW installed in 2020 alone.

Some of this expansion will be driven (as it often is) by declining costs, but there are other factors. Changes to net metering rate structures, for example, can tilt the market toward storage deployment for self-consumption of PV. For example, Hawaii, which has the highest percentage of PV on the grid in the country, recently overhauled its net metering policy to encourage self-consumption. This will, without a doubt, drive energy storage deployment.

Looking ahead, PV users will likely be able to offer a stack of services to the grid, such as frequency response, voltage support, and distribution upgrade deferral. A recent report from the Rocky Mountain Institute makes the case that the revenue associated with these additional services could further improve the economics of PV systems paired with smart controls and batteries.

Other factors helping to boost demand and lower costs are the growing emphasis on grid resiliency for energy security and independence, and the proven value of storage in smoothing intermittent renewable resources like PV (and wind).

Many observers have said that energy storage is where PV was six or seven years ago, and believe that the factors that brought PV to mass affordability will have a similar effect on storage. What do you think is the reason for market growth and lower costs?

Jordan A. Davis No Comments

Dynapower to Supply Energy Storage Inverters for Tesla Powerpack

Dynapower to Supply Energy Storage Inverters for Tesla Powerpack

Dynapower Company, the global leader in energy storage inverters, announced that it will be supplying the 250 kW energy storage inverters as an integral part of Tesla’s recently announced Powerpack Commercial battery systems for large commercial and utility customers.

The Dynapower MPS™-250 inverter is a UL-listed, field-proven product with outstanding performance history. Tesla selected the Dynapower system based on the company’s technology, track record, and long-term viability.

“Dynapower leads the energy storage inverter market in reliability and efficiency, which together create premium value for our customers. It’s this value that has enabled us to deploy a market-defining 200 megawatts of energy storage inverters,” said Adam Knudsen, Dynapower President. “For Tesla, we customized the MPS™-250’s performance characteristics to provide an optimized system for their demanding market requirements. The combination of proven technology, enhanced by design flexibility is what we provide to every Dynapower customer.”

Tesla’s Powerpack systems are designed for large commercial, industrial, and utility-scale applications. Multiple 100 kWh DC battery blocks are grouped to scale from 500 kWh to 10 MWh+. These systems are capable of 2-hour, 3-hour or 4-hour continuous net discharge power using grid-tied bi-directional inverters, such as the Dynapower MPS systems. Powerpack systems support various storage applications, including peak shaving, load shifting and demand response for commercial customers, while offering renewable energy firming and a variety of other services for utilities.

About Dynapower Energy Storage Inverters

Dynapower’s four-quadrant bi-directional energy storage inverter systems utilize advanced digital controllers for management of real and reactive power, system monitoring, and protection. The company’s MPS™ and CPS™ product lines are IEEE and UL1741 compliant; offer sub-cycle response with zero voltage ride-through; and can be can be operated in both grid-tied or stand-alone (grid forming) modes. Dynapower inverters are deployed globally as grid-tied energy storage inverters and as micro-grid inverters, enabling increased penetration of renewable generation resources.

About Dynapower Company LLC

Dynapower is a global leader in the design and manufacture of standard and custom power conversion equipment including high-power rectifiers, bi-directional inverters, control systems and transformers for use in energy storage, industrial, mining, military and research applications. With more than 50 years of experience providing power electronics solutions to a global customer base, Dynapower’s product range includes discrete power electronics and fully integrated systems ranging from 100 kilowatts to 50 megawatts. More than 200 MW of the company’s high reliability, bi-directional inverters have been deployed in energy storage systems worldwide. For more information, visit:

Media contacts:

For Dynapower
Richard Morin
Marketing Specialist

For Tesla
Khobi Brooklyn
Director, Global Communications

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Keller Electrical Industries, Inc. named an Authorized Service and Repair Facility for Dynapower

PHOENIX, ARIZONA, June 26, 2015 – Keller Electrical Industries, Inc. is excited to announce that we have been named to serve as an authorized repair and service facility for Dynapower Company LLC.

Dynapower Company is proud to celebrate over 50 years of providing power electronic solutions. Dynapower is a global leader in the design and manufacture of AC and DC power supplies, energy storage systems and custom transformers. Their product scope includes integrated systems from 10 kilowatts to 50 megawatts. Dynapower’s modern 150,000 sq/ft. facility in South Burlington, VT is vertically integrated with the capability to design, manufacture and test complete power systems including transformers of all types. Dynapower’s continued growth over the last 50 years is attributable to a firm commitment to research and development, continuous improvement, and innovative designs.  Their products and services include: Industrial Rectifiers, Switch-Mode Rectifiers, Energy Storage Inverters, High Power Rectifier Systems, Transformers, Controls, Spare Parts, and Technical Service & Support.

 Founded in 1982, Keller Electrical Industries, Inc. is a leading provider of industrial electrical motor repairs and service, custom motor control manufacturing and distributor of heavy duty motors and equipment.  Keller boasts a state-of-art facility which houses the Company’s corporate headquarters along with its manufacturing, repair, electrical engineering and design divisions, as well as a product distribution facility.  The 105,000 sq/ft. facility includes 270 KW of roof-top solar power generation that provides a significant portion of the Company’s energy consumption needs.  The facility includes the most modern and technologically advanced motor repair, manufacturing, production and testing equipment available in the world.  Keller’s team represent over 1,000 years of combined experience and have the training and skills needed to support today’s industry.

To put Dynapower to work for you, contact our Sales department, by phone: 602-437-3015 or by e-mail: to coordinate and schedule service or repair.

Keller Electrical Industries, Inc. is headquartered in Phoenix, Arizona and provides services throughout the state and southwest including California, Nevada, Utah and New Mexico.  More information about the company is available at