REbus DC Nanogrid

For the first time ever, power transmission, control, and data share the same wire. This is the patented REbus DC Nanogrid™.


Clean energy systems have never been simpler. Using the REbus DC Nanogrid, all devices are plug-and-play on a common DC bus for maximized efficiency and ease of installation and operation.

REbus is a revolutionary new way to connect clean energy products – an “energy operating system” that enables smart buildings to make our lives more secure and our energy cleaner and more affordable. REbus uses advanced power electronics to transmit power and information on the same wires, helping our buildings produce, store, and manage power more efficiently. REbus technology is at the heart of all of Pika Energy’s products.


The Challenge

Self-generation of clean power by consumers is transforming the global energy landscape, but the power grid is far from ready. Consider three surprising electricity facts:

  • Electricity customers in Hawaii could save over 70% by using solar panels – but with a grid already bottlenecked by a large amount of backfeeding solar, Hawaii needs a solution to help the utility respond to peaking demand.
  • Many commercial building owners pay double for electricity from demand charges – but they can’t avoid them without compromising their operations.
  • A conventional grid-tied rooftop solar PV system is a great way to cut energy costs, but without islanding power, solar panels are worthless when the grid goes down – even when the sun is shining.

Our century-old AC utility grid is broken, and power customers are paying the price.

In each of the above cases, the solution is the same: Smart power electronics to give customers options, security, and savings.

Benefits for Homeowners: Savings and Security

Home with solar panels REbus nanogridREbus helps homeowners enjoy secure power and cost savings. REbus is built to help homeowners generate their own clean power, which is now the most affordable energy source in many places. But conventional renewable energy systems won’t keep your home powered during a blackout or grid failure. REbus is designed to incorporate battery storage, so your lights stay on and your furnace keeps running without the noise and hassle of a backup generator. And if your lifestyle takes you beyond the grid, REbus enables wind and solar power systems that provide balanced power day or night, all year around.


Benefits for Commercial Buildings: Scalable Secure Power

REbus commercial lightingSecure power isn’t optional in today’s competitive business environment, where a few lost days can mean the difference between profit and peril. REbus enables smarter buildings that generate their own power, store and deliver energy to avoid demand charges and ride through blackouts, and prioritize power to your most critical functions. Pika Energy partners with leading solution providers to offer scalable building energy systems that deliver savings and security.


Why is REbus better?

Built for Nanogrids: Renewable generation and storage

REbus is designed to turn grid-dependent buildings into nanogrids – energy networks that combine energy sources, storage, and loads to allow operation independent of the grid. The REbus nanogrid was designed to plug-and-play, making it easy to combine different sources to build secure, efficient, cost-effective energy systems for homes and businesses. Because our buildings will increasingly produce as well as consume energy (the “Prosumer” model), REbus is built on bi-directional power electronics that can buy, sell, or store power efficiently.

Smarter Wires and the Internet of Things

Pika’s REbus nanogrid approach delivers both energy and system information over the same wires, making every product on the network a smart node in the “Internet of Things.” Abundance of power is signaled by the voltage of the REbus, making it simple to deliver powerful capabilities, like heating water when energy is plentiful, and selling power when prices are highest. REbus also uses Powerline Carrier communication (PLC) to share information – more reliably than wireless in tough, noisy environments.

Direct Current

The electrical grid we use today was designed in 1890 – one hundred years before the digital revolution – and hasn’t changed much since then. It makes and uses Alternating Current (AC), but almost every modern appliance and computer needs Direct Current (DC) to run, and today’s new clean power systems (like solar, wind, fuel cells, and electric vehicles) produce DC as well. AC adapters and converters waste valuable power, clutter our desks, and make it hard to build smarter electric grids. Pika Energy asked, “what would electricity distribution look like if it were designed for today’s energy sources and loads?”

Less Energy Loss

REbus sets a new standard for safe, efficient power distribution with a 380 volt DC bus. This means energy losses are 2.5 to 10X lower compared to old-fashioned AC wiring, and wiring costs can be lower. Converting power from clean energy sources to a REbus nanogrid is significantly more efficient than converting to the AC grid, and less loss means more value to the building owner.

Less Expensive

REbus saves capital cost by eliminating multiple AC/DC conversions, and by reducing the amount of expensive copper wire needed to transmit power. Integrated powerline carrier (PLC) communication eliminates the need to run control wiring or add expensive and unreliable wireless communications.