Energy Storage System uses transformerless DC inverter

Energy Storage System uses transformerless DC inverter

Technology News |
By Nick Flaherty

SimpliPhi Power has teamed up with Sol-Ark to use a DC transformerless hybrid inverter in its latest energy storage system (ESS).

The AccESS + Sol-Ark unit combines SimpliPhi’s cobalt-free LFP PHI batteries with the Sol-Ark 8K all-in-one inverter and built-in dual integrated charge controllers in a NEMA-3R indoor/outdoor-rated cabinet.

“As awareness of the different lithium ion chemistries available in the market has grown, the AccESS has gained popularity worldwide with home and business owners looking for a high performance and safe alternative to the ESS solutions that utilize lithium cobalt-based batteries,” said Catherine Von Burg, CEO of SimpliPhi. “Now with the Sol-Ark, we’re also able to deliver an integrated solution that is more efficient, more powerful, and even simpler to install.”

“When looking at all-in-one-solution partners, we were drawn to SimpliPhi as a battery manufacturer that takes performance and long term costs as seriously as we do, and because they share our mission to help families be less dependent on the grid in an affordable way,” said Tom Brennan, engineering manager at Sol-Ark. “The combination of our ability to deliver 96.5 percent efficiency in on-grid and 93 percent in off-grid and time of use scenarios with minimal conversion losses with SimpliPhi’s 98 percent efficiency is unbeatable in the market and promises to do more to create universal energy access and security.”

Available with 15.2 or 22.8 kWh of PHI storage, the AccESS can scale up with additional cabinets for more power storage and greater output with the introduction of Sol-Ark’s 12K by the end of the year. Units can be safely installed indoors or outdoors in temperatures from -20° to +50 °C, on- or off-grid. The AccESS can be charged with solar, wind, grid or generator power and comes pre-wired and pre-programmed.

The 48V DC transformerless Sol-Ark 8K hybrid inverter sets records needs 5 to 15 percent fewer solar panels and 5 to 20 percent less battery capacity that other inverters. The Sol-Ark inverter can be AC- or DC-coupled, is Rule 21 compliant for US operation and features built-in software for time of use and other utility rate cost savings applications. One Sol-Ark delivers 20kW peak surge. Installation is also simpler with a plug-and-play design, saving installers time and money.

“SimpliPhi and Sol-Ark both design to a military performance standard, which translates into more reliable and robust products,” added Von Burg. “The US Army and Marine Corps were among SimpliPhi’s first customers, and our R&D today is as rigorous as that which helped us perform flawlessly at the Aberdeen Proving Ground, as well as demonstrate a zero-failure-rate in combat zone deployments in Iraq and Afghanistan. Sol-Ark’s background in defense contracting led them to consider security more than any other inverter manufacturer to create products that can withstand EMP, solar flare or cyber-attack without damage. We share a commitment to build solutions for the worst-case scenario that function just as elegantly in best-case scenarios.”

“The Sol-Ark’s 4 millisecond no-glitch transfer time is twice as fast as Outback or Schneider and 500x faster than Tesla or SolarEdge for companies that cannot afford a single second of downtime and homeowners with unstable grid power who prefer to not frequently reset their blinking clocks or reboot their computers. We’re proud to have gone through three rounds of highly accelerated life testing to last many years beyond our warranty,” said Brennan.

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