FAQ Backup Power Questions

RoseWater Energy is an American company that makes whole-home power management systems called HUBs. It was founded in 2012, installed its first HUB in 2015, and is based in Plantation, Florida. Its systems are sold and designed through authorized dealers and integrators.

A HUB is a power system that sits between the utility and your electrical panel and runs every protected circuit through itself all the time. It stops surges, fills in sags, regulates voltage, filters noise and stores energy in batteries. When the grid fails, the house keeps running with no interruption.

Yes. Boston Backup Power is a division of Boston Automations, an authorized RoseWater Energy dealer based in Norwood, Massachusetts. We design and specify RoseWater systems and register each project with RoseWater's engineering team.

The difference is how much power each one carries. The HUB20 is a single cabinet rated 20 kW / 100 A. The HUB40 is two cabinets rated 40 kW / 200 A. The 3-Phase systems serve 208 V three-phase homes in 30, 45 and 75 kVA sizes. The HUB20 and HUB40 both come with 28.8 kWh of battery storage, expandable to 86.4 kWh and 172 kWh.

Zero transfer time means there is no gap at all between grid power and backup power. A HUB is already carrying the load when the grid fails, so there is nothing to switch over. It runs as an always-online double-conversion system with no eco mode, which means the power your home uses is rebuilt clean every second of the day.

Power conditioning is cleaning up electricity before your equipment uses it. That includes stopping surges, filling in sags, regulating voltage and filtering electrical noise. A HUB delivers 120 V, 60 Hz power with total harmonic distortion under 3%.

A HUB is built to handle all ten common power problems. RoseWater lists them as blackouts, frequency variation, transients, harmonics, overvoltage, undervoltage and brownouts, sags, electromagnetic interference, radio frequency interference and surges. Its lightning protection is rated for up to 40 strikes of 140,000 V.

It depends on what the HUB is carrying. Run time is calculated for each home in its Power Plan, based on the loads you protect and the battery storage you choose. A generator or solar can recharge the batteries during a long outage.

Yes, with the right design. Many homes put one HUB20 or HUB40 on the circuits that matter most, and whole-home protection usually takes more than one HUB, often with a generator. A better first question is which problem you are solving: a one-second blip, a two-hour outage or a week-long storm.

A Power Plan is a list of what in your home must stay on and how well each part should be protected. RoseWater uses it to size a system around your lifestyle and how much downtime you can accept. You can start one on our Power Plan page in about three minutes.

Start with anything run by microprocessors that would be painful to lose. That usually means the network, lighting control, security, automation, AV, HVAC controls and wine or other critical refrigeration. Tell us about any home healthcare equipment so we can plan circuits and run time around it; life-sustaining equipment also needs the backup its manufacturer specifies. Heavy motor loads like well pumps and EV chargers are often fine on generator standby.

You may, if you see flickering lights, LED bulbs failing early, screens dimming or equipment that needs rebooting. Those are signs of sags, surges and noise that happen every day without an outage. Outages are only the visible part of the problem.

A storage battery waits behind a transfer switch, while a HUB conditions your power all the time and backs it up. When the grid is up, a storage battery does nothing for power quality. A HUB protects every circuit it serves every day and has no switchover when the grid drops.

They do different jobs, and many homes are best served by both. A standby generator only starts after the power goes out, so the house is dark until it comes up, and it does nothing about everyday surges or sags. A HUB covers that gap and conditions the power, and a generator can recharge the HUB's batteries in a long outage.

Yes. HUBs work with one or more generators, and the HUB conditions generator power the same way it conditions grid power. We coordinate the connection with your electrician or generator installer.

Yes. With RoseWater's SBX10 solar box, a HUB can take up to 10 kW of solar. Solar keeps the batteries full first, then helps feed the house, and we coordinate the connection with your solar installer.

No. A HUB charges its batteries from the grid or a generator and works fully without solar. Grid-tied solar without a battery shuts down when the grid goes down, so solar on its own is not backup power.

A surge protector only diverts extra voltage, while a HUB also fixes sags, regulates voltage, filters noise and provides backup. A sag is missing energy, and you cannot divert power that is not there. Fixing a sag takes stored energy, which is what the HUB's batteries supply.

Plan for an indoor area about 3.5 feet wide, 3 feet deep and 8 feet high, plus 36 inches clear in front for service. A garage or basement is the usual spot, and no air conditioning is needed. Each HUB40 cabinet is 52 inches tall and the pair can sit side by side or stacked.

Yes, the HUB40 can go outdoors in RoseWater's outdoor enclosure, released in July 2025. It is powder coated and weather resistant, holds the full battery configuration and has built-in climate control. It helps on retrofits and in towns that do not allow battery systems indoors.

Yes. More than half of RoseWater's installations are retrofits. The HUB connects at the main electrical panel, so we look at the panel and the space on a site visit before we design anything.

A licensed electrician makes the electrical connections, and RoseWater's technicians commission the system. We design and specify it, coordinate the electrician and RoseWater's team, integrate it with your home's systems and support it afterward. If you already have an electrician, we work with them.

A HUB uses advanced lead-acid (carbon) batteries. RoseWater chose them for safety, thermal stability and predictable behavior, and they are more than 90% recyclable. RoseWater cites a usable life of 7 to 10 years.

A HUB is designed for safety, starting with lead-acid batteries chosen for their thermal stability. The cabinet is seismic rated, and the system is built with redundancy and as few single points of failure as possible. Critical components are hot-swappable and serviced from the front without putting the system into bypass.

Remote monitoring is built in. You get access to data on outages, voltage and energy use, and alerts can go to you, to us and to RoseWater. That is especially useful for second homes on the Cape and the Islands, and the HUB also beeps when its batteries run low.

RoseWater warrants the HUB for 3 years from the date of commissioning against defects under normal authorized use, and repairs or replaces parts at its discretion. Commissioning by RoseWater-trained personnel is required for coverage. Claims start with your dealer, which is us.

Every system is sized to the home, so we do not publish prices. Cost depends on the service size, which loads you protect, battery storage and whether solar or a generator is involved. Start a Power Plan or book a consultation and we will give you a clear proposal for your house.

We serve eastern Massachusetts, Cape Cod and the Islands, Newport and coastal Rhode Island, and southern New Hampshire and the Seacoast. That includes Greater Boston, MetroWest, the North Shore and the South Shore, from our office in Norwood.

Yes. We help with sizing, specifications and drawings, and we coordinate the electrician and RoseWater's technicians on the job. Our trade page explains how we work with your team.

Build a Power Plan on this site or call us at (781) 333-8003. We get back to you, visit the home, and design the system with RoseWater's engineering team.