Solar Energy Storage Equipment for Grid-Tied Residential Projects: Page 4 of 5
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In this article, we consider some of the use cases and emerging markets for residential grid-...
Technological advancements, constrained electric grids with high penetrations of PV systems and the...
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Founded in 2010, Pika Energy manufactures home energy systems that include bidirectional inverters, substring PV array optimizers, and lithium-ion and AGM energy storage systems. The company developed its Pika Energy Island system to provide residences and small businesses with an integrated solution for backup power, self-supply and demand charge reduction. The Energy Island uses three Pika products as building blocks: the Islanding Inverter and Pika PV Link dc optimizer, and either the recently launched Harbor Smart Battery (lithium ion) or the Coral Smart Battery (AGM). Panasonic lithium-ion cells configured to operate at 360 Vdc–420 Vdc power the Harbor Smart battery. Two models are available: 15 kWh/6.7 kW and 10 kWh/4.5 kW. Pika Energy backs the Harbor Smart battery with a 10-year warranty.
Developed for backup power, self-supply and rate arbitrage applications, the Pika Islanding inverter is a bidirectional, storage-ready, transformerless islanding inverter that can operate with or without batteries. With a nominal dc input voltage of 380 volts, Pika Energy’s single-phase 7.6 kWac X7600 Series Inverter connects PV, energy storage, electrical loads and the grid, and supports 120/240 Vac backup loads without requiring an autoformer. Pika also offers its 11.4 kWac X11400 Islanding Inverter for 3-phase applications.
Pika Energy’s PV Link S2501 subarray PV optimizer supports the creation of 380 Vdc nominal arrays compatible with its bidirectional inverters and 380 Vdc system bus. The PV Link can interconnect two to nine modules to create subarrays of up to 2,500 W. The product is rapid shutdown compliant and provides MPP tracking (60 Vmp–360 Vmp range), shade mitigation, ground-fault protection, arc-fault protection and substring monitoring via power line communication.
Pika Energy • Westbrook, ME • 207.887.9105 • pika-energy.com
Schneider Electric is a global manufacturer of power distribution and automation systems. Headquartered in Rueil-Malmaison, France, Schneider entered the solar industry with its 2008 acquisition of Xantrex Technology (Xantrex acquired Trace Engineering in 2000). Schneider offers two inverter-charger lines suitable for residential energy storage applications. For non-export systems, its Conext SW-NA hybrid inverter-charger offers a nominal dc input voltage of 24 Vdc or 48 Vdc and continuous output power classes of 2,400 W and 3,400 W at 24 Vdc and 3,800 W at 48 Vdc. The inverter-chargers have split-phase 120/240 Vac output and are compatible with flooded and valve-regulated lead-acid (VLRA) battery types. The Conext SW-NA supports ac- and dc-coupled configurations and enables grid backup, self-consumption with solar prioritization, peak shaving and ac engine generator assist.
The more feature-rich utility-interactive Schneider Conext XW+ NA inverter-charger line was one of the first to support integration of lithium-ion battery types. Complete energy storage hardware and software solutions from other vendors commonly integrate this equipment. Like Schneider’s Conext SW-NA inverter-chargers, the Conext XW+ NA supports ac- and dc-coupled configurations and enables grid backup, self-consumption with solar prioritization, peak shaving and ac engine generator assist. It can also export power to the utility grid. Schneider offers system integration panels for its inverter-chargers, as well as two MPPT solar charge controllers, the 150 Vdc MPPT 60 150 and the 600 Vdc MPPT 80 600.
Schneider Electric • Andover, MA • solar.schneider-electric.com
SimpliPhi Power launched in 2009, but its roots date back to 2002, when it first emerged as a company named LibertyPak, which began developing and supplying lithium-ion batteries to the film and television industry. Today, SimpliPhi Power offers deep-cycle lithium ferro phosphate (LFP) battery models as drop-in replacements for lead-acid batteries in 24 Vdc and 48 Vdc nominal power systems. Its UL- and CE-listed Smart-Tech product line does not require ventilation, cooling or thermal regulation. Each battery includes a built-in 80 A dc breaker on-off switch that increases safety during system installation, commissioning and O&M. SimpliPhi Smart-Tech batteries have no memory effect, offer a self-discharge rate of less than 1% per month and an operating efficiency of 98%, and can discharge to 100%. The batteries have a cycle life of 10,000 cycles and a warranty period of 10 years.
The PHI 2.6 model weighs 57.5 pounds and has a rated capacity at C/2 of 2.62 kWh. The higher-capacity PHI 3.4 weighs 75.5 pounds and has a rated capacity at C/2 of 3.44 kWh. Both models have an operating voltage range of 20 Vdc–28.8 Vdc at 25.6 Vdc nominal and 40 Vdc–57.6 Vdc at 51.2 Vdc nominal. SimpliPhi also offers high-output versions of its Smart-Tech batteries, as well as its AccESS energy storage system, which integrates its batteries with Schneider Electric XW+ 6848 NA inverters.
SimpliPhi Power • Ojai, CA • 805.640.6700 • simpliphipower.com