RoseWater Energy
Conditioned, always-on power for a full 200 A service, with storage that grows to 172 kWh.
What is the RoseWater HUB40?
Best for
- Homes on a 200 A service
- Estates with home theaters, network racks and smart-home systems
- Coastal and rural homes that see long outages
What you get
- 28.8 kWh of battery storage in a three-shelf cabinet, expandable to 172 kWh
- Sixteen hot-swappable inverter modules, serviceable from the front
- Surge and lightning protection rated for up to 40 strikes of 140,000 V
- Up to 10 kW of solar through the SBX10, plus one or more generators
- An outdoor enclosure option for homes without indoor space
RoseWater HUB40 specifications
| Continuous power conditioning | 40 kW / 200 A |
|---|---|
| Transfer time | Zero (always online) |
| Service voltage | 240/120 V, or two legs of 208 V 3-phase |
| Output distortion (THD) | Under 3% |
| Inverter modules | 16, hot-swappable |
| Standard battery | 28.8 kWh, three-shelf cabinet |
|---|---|
| Maximum battery | 172 kWh with extended battery packs |
| Battery chemistry | Advanced lead-acid (carbon) |
| Surge rating | Up to 40 strikes of 140,000 V |
|---|---|
| Solar input | Up to 10 kW with the SBX10 |
| Generator | Works with one or more generators |
| Remote monitoring | Built in |
| Enclosure | Two cabinets (HUB and battery), side by side or stacked |
|---|---|
| Dimensions | 52" H x 28.1" W x 26.25" D, each cabinet |
| Outdoor option | Weather-resistant, climate-controlled enclosure, 60" total height |
| Warranty | 3 years from commissioning |
Specifications as published by RoseWater Energy on rosewaterenergy.com. Run time depends on what the system carries, so we calculate it in your Power Plan rather than quote a number here.
Is the HUB40 the right size for my home?
Map the loads
Your Power Plan separates the systems that must always stay on from the ones that only need to come back after an outage.
Confirm 200 A
We check your panel schedules and service to confirm a HUB40 covers it, or whether a second HUB or a 3-phase system is needed.
Plan storage and fuel
We set battery storage between 28.8 and 172 kWh and coordinate a generator with your electrician if the plan calls for one.
The Power Plan walks through the same load categories RoseWater uses, so we start your design with real information.
Can the HUB40 be installed outside?
It is a good fit for retrofits without a spare corner in the basement or garage, and for towns that do not allow battery systems indoors. The enclosure is quoted per project, and we work out placement with your electrician.
Who installs it?
Boston Automations
Builds your Power Plan, designs and specifies the system, registers the project with RoseWater's engineering team, coordinates the electrician, programs and integrates the HUB with your home's systems, and supports it for the life of the system.
Your licensed electrician
Makes the electrical tie-in at your panel. If you have an electrician you trust, we work with them. If you do not, we bring in one we know.
RoseWater Energy
Builds the HUB, delivers it to the install location, and sends an on-site technician to commission it. Commissioning by RoseWater-trained personnel is what starts the three-year warranty.
RoseWater HUB40 questions
How big is the RoseWater HUB40?
How big is the RoseWater HUB40?
The HUB40 is two cabinets, each 52 inches high, 28.1 inches wide and 26.25 inches deep. They can stand side by side or be stacked.
How much battery storage does the HUB40 have?
How much battery storage does the HUB40 have?
The HUB40 comes with 28.8 kWh of storage in a three-shelf battery cabinet, the same standard storage as the HUB20. It can be expanded to 172 kWh with RoseWater's extended battery packs.
Can a HUB40 back up a 200 amp panel?
Can a HUB40 back up a 200 amp panel?
Yes. The HUB40 provides 40 kW of continuous power conditioning on a 200 A service, so it can carry a full 200 A panel with zero transfer time.
Should I pair a HUB40 with a generator?
Should I pair a HUB40 with a generator?
Often, yes. RoseWater calls a HUB40 with a generator an ideal combination. The HUB carries the house instantly and keeps power clean, and the generator recharges the batteries during a long outage. Your electrician installs the generator and we coordinate the two.
Can the HUB40 go outdoors?
Can the HUB40 go outdoors?
Yes. RoseWater's outdoor enclosure for the HUB40 is weather resistant, climate controlled and holds the full three-shelf battery configuration at a total height of 60 inches.
Where to go next
Build Your Power Plan
Choose what should stay on and get a first sizing for your home.
How a HUB works
Diagrams that show how the HUB handles surges, sags, noise and an outage.
Generator and Battery Together
How a battery and a standby generator share an outage, and why generator power still needs cleaning up.
How Much Battery Backup You Need
How to list the loads that matter, think in kilowatt-hours and decide what belongs on battery.
Backup Power for Cape Cod Homes
Long coastal lines, second homes you can't check on, salt air, and what a whole-home system does about each.
Backup power FAQ
Straight answers on batteries, generators, solar and installation.
Talk to us
Call (781) 333-8003 or send a note and we will set up a consultation.
Plan a HUB40 for Your Home
Tell us what has to keep running and for how long. We will size the HUB40, the battery and any generator around it.