Optimizing PV Systems January 2015 - Part 2: Energy Storage | Page 30

SPATIAL DESIGNS

Spatial Designs of Mason City, Iowa USA is a leader in architectural design adapting alternative energy technical innovation, to the point where the firm became one of the first to design and sell solar-powered FEMA (Federal Emergency Management Agency) tornado shelters. With a portfolio of over 1,500 projects across the United States and more recently in Africa, Spatial Designs turned its expertise recently to equipping its own facilities with energy storage to work with solar and wind sources, for its own economic and security benefit as well as that of its clients, which include banks, schools, restaurants, shopping centers, office buildings, fire stations and other municipal services, and much more. For a renewable energy system to provide its own 3,000 square-foot building with heating and cooling in a region where the winter temperature can drop to 30 degrees below zero, Spatial Designs speced-in a 7.2kW inverter/charger system with 16 48V/400Ah batteries with a total capacity of 38.4kWh. This alternative-energy business asset enables the company to present the technology to its clients while also using it to both save money in utility costs and maintain its operations during outages.

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Energy Storage eFeature | January 2015

SKYWIRE ELECTRICAL SYSTEMS RESIDENTIAL

A family-owned business that provides residential and commercial energy services to customers in urban and remote locations in Missouri, USA, Skywire Electrical Systems’ comprehensive portfolio includes lighting design, electrical contracting, and alternative energy solutions including grid-tied and off-grid PV/solar and solar thermal. A typical residential project will include the need for long-term off-grid autonomy while maintaining electricity for refrigerators and freezers, critical lighting, pumps and other essential loads. This 24kW residential PV/solar example includes a 130kWh bank of 60 batteries with a “red line” optimized for longer float life, since the system is grid-interactive and the batteries are primarily for back-up use.

ENERGY STORAGE PROFILES - PAGE 1