When the grid goes down,
your home doesn’t.
A properly designed EcoFlow DELTA Pro Ultra system from Symmetry Electric keeps the circuits that matter powered—automatically, quietly and without dragging a generator out in the dark.
Plan my backup system →Designed around your actual loads. Installed by licensed electrical contractors.
A battery is only useful when it’s designed around your home.
Backup power is not simply about buying the largest battery. Your system needs enough stored energy for the outage and enough inverter output to operate the equipment you need at the same time.
Symmetry Electric evaluates your electrical service, essential circuits, heating and cooling equipment, pumps, appliances and desired runtime before recommending a configuration.
Start where you are.
Expand when you need to.
DELTA Pro Ultra is modular. Add batteries for longer runtime and add inverters for greater simultaneous output without replacing the equipment you already own.
One to three inverters provide 120/240V output for household loads.
Add 6 kWh battery modules as your runtime requirements grow.
Add compatible solar charging now or as a future expansion.
The brain behind
automatic backup.
The Smart Home Panel 2 monitors the home, transfers selected circuits during an outage and helps prioritize stored power where it matters most.
Backup power activates without extension cords or manual generator setup.
See household consumption and battery performance through the EcoFlow app.
Protect remaining capacity by controlling non-essential circuits.
Connect up to three DELTA Pro Ultra inverters and expand battery storage.
Choose your level
of resilience.
Every option includes the EcoFlow Smart Home Panel 2. Final design depends on available service capacity, required output, desired runtime and installation conditions.
Core Continuity
Focused backup for essential circuits and shorter outages.
- Smart Home Panel 2
- 1 DELTA Pro Ultra inverter
- 1 × 6 kWh battery
Extended Resilience
Substantially longer runtime while maintaining the same available output.
- Smart Home Panel 2
- 1 DELTA Pro Ultra inverter
- 4 × 6 kWh batteries
Whole-Home Performance
Higher output and serious capacity for broader household backup.
- Smart Home Panel 2
- 2 DELTA Pro Ultra inverters
- 6 × 6 kWh batteries
Prices are estimated installed prices in Canadian dollars before applicable taxes. Every installation is different. Final pricing may vary following a site assessment based on equipment requirements, panel location, cable routing, service capacity, labour, materials, permits, inspections, utility requirements and other site conditions. A written Symmetry Electric quote will confirm the final scope and price before work begins.
Know what your
stored power can do.
Capacity determines runtime. Inverter output determines how much equipment can operate simultaneously. These examples show managed household consumption—not unlimited whole-home use.
18 kWh nominal
Plan around approximately 14–16 kWh after conversion losses and reserve settings.
- Refrigerator + freezer≈ 2.0 kWh
- Gas furnace blower + controls≈ 4.0 kWh
- Well pump + sump pump≈ 1.5 kWh
- Lighting + selected receptacles≈ 1.5 kWh
- Internet + home office≈ 1.0 kWh
- TV, devices + brief microwave use≈ 2.0 kWh
36 kWh nominal
Plan around approximately 29–32 kWh after conversion losses and reserve settings.
- Refrigerator + freezer≈ 2.0 kWh
- Gas furnace blower + controls≈ 5.0 kWh
- Well pump + sump pump≈ 1.5 kWh
- Lighting, receptacles + office≈ 3.0 kWh
- TV, devices + communications≈ 1.0 kWh
- Selected heat-pump or A/C operation≈ 8.0 kWh
- Managed cooking + laundry≈ 4.0 kWh
Weather, thermostat settings, appliance efficiency, pump cycles and household habits can materially change runtime. Electric resistance heating, electric water heaters, ranges, dryers, hot tubs, central air conditioning and EV charging are heavy loads. Running several for long periods can consume a battery bank quickly.
Keep the essentials on. Choose what essential means.
Let’s design the right backup system for your home.
Tell us what you want powered, how long you want it to last and what equipment is already installed.
Request a site assessment and receive a system recommendation based on your home—not a generic package.
Get started →Or call 613-703-4334