Solar Builder

JUL-AUG 2018

Solar Builder focuses on the installation/construction of solar PV systems. We cover the latest PV technology (modules, mounting, inverters, storage, BOS) and equip installers/contractors with tips and tools to make informed purchasing decisions.

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28 J U LY / AU G U S T 2 0 1 8 already levying punitive demand charges on customers. The evolving rate structures and impact of resident vacancy rates, vaca- tion schedules and time-of-day load pro- files frequently make deploying solar gen- eration uneconomical for large portions of property development. Virtual net-meter- ing and virtual peer-to-peer programs are fraught with excessive complexity and administrative overhead. EnSync will initially target the multi- residential property market for its solu- tion, and then broaden its market pres- ence. At the time of launch, the company had already built a sizable order backlog for the EnSync Home Energy System. The Michaels Development Co. was the f irst to sign a 20-year PPA to build a solar and energy storage system at the Keahumoa Place affordable housing development, a greenf ield project in Hawaii that is expected to complete con- struction in 2019. Savings from the PPA will f inance the construction of a 750- kW PV panel-covered canopy that will simultaneously produce energy and shade the development's parking lot, as well as a 500-kW hour energy storage system, with individual modules interconnected by the proprietary True Peer-to-Peer DC-Link behind each unit's utility meter. "True Peer-to-Peer revolutionizes the economics of solar + storage in residential properties like Keahumoa, by dramati- cally reducing the negative impacts of vacancy rates, absence during peak gen- eration times, vacation schedules and micro-loading effects within each unit from appliances such as refrigerators and air conditioners," Hansen says. EnSync Energy is working on the proj- ect with Hawaiian Electric to intercon- nect the system to its grid in accordance with tariffs set by the Hawaii Public Utilities Commission. The utility will provide power to future Keahumoa resi- dents as an on-demand backup resource. In return, its grid will benefit from an aggregated, more stable load profile than those of most multiresidential units, which often generate f luctuating, incon- sistent loads. "Hawaii 's energ y transformation enables Hawaiian Electric to implement innovations to build a leaner, greener grid that delivers renewable energy to all Hawaii residents," says Colton Ching, SVP of planning and technology at Hawaiian Electric. "We look forward to working with EnSync Energy to imple- ment its automated technology in Hawaii and make distributed energy resources affordable across income levels, facilitat- ing widespread deployment of clean ener- gy in the state." SOLAR + SHARING The EnSync Home Energy System includes high-efficiency "LFP" lithium-ion batteries, a Matrix Energy Management system with 9-kWac output capacity, modular energy storage capacity of 9-kWh increments, modular DC-DC converters and the DER Flex Internet of Energy control platform.

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