Never lose power.
The EP Cube is a whole-home battery backup system installed by Stellar Upgrades across Edmonton and Alberta. It detects power outages in milliseconds and switches your home to stored battery power automatically — no flicker, no manual startup, no generators. Available in four sizes from 9.9 kWh to 19.9 kWh, fully installed by our in-house master electricians. LiFePO4 chemistry. 10-year battery warranty. 7.6 kW continuous output. NEMA 4X rated for indoor or outdoor installation. Made by Canadian Solar.
Power outages are getting worse.
Alberta's grid faces extreme weather, aging infrastructure, and surging demand. A single extended outage can cost $2,000–$15,000+ in spoiled food, frozen pipes, sump pump failure, and hotel stays.
Extreme Weather
Ice storms, severe winters, and heat waves cause outages lasting hours or days. Frequency is increasing every year across Alberta.
Frozen Pipes: $5,000–$15,000
When your furnace fan stops, pipes freeze and burst. Insurance doesn't always cover the damage if you weren't home to prevent it.
Spoiled Food: $300–$800
Fridge and freezer contents start spoiling within 4 hours. A deep freeze full of meat can mean hundreds lost in a single outage.
Sump Pump Failure: $3,000–$10,000
When power goes out in spring, your sump pump stops. Basement flooding follows. The EP Cube keeps it running automatically.
Automatic protection in milliseconds.
The EP Cube monitors your grid connection 24/7. When power drops, it takes over instantly. When the grid returns, it switches back seamlessly. No buttons to press, no fuel to buy.
1. Outage Detected
Grid power drops. EP Cube detects it in under 20 milliseconds.
2. Instant Switchover
Built-in hybrid inverter switches your home to battery. No flicker.
3. Home Stays Powered
Fridge, furnace fan, lights, sump pump, Wi-Fi — all keep running.
📱 Monitor Everything From Your Phone
Real-time battery charge level, power consumption, and backup status. Get alerts when the grid goes down. The EP Cube app works on iOS and Android.
What size does your home need?
Answer 4 quick questions. We'll recommend the right EP Cube size for your home and show you exactly what's included in every installation.
How big is your home?
This helps us estimate your electrical load.
What must stay powered during an outage?
Select all that apply. More loads = larger battery.
How long should your backup last?
Think about the longest outage you'd want to ride through.
Do you have solar panels?
If yes, your battery can recharge from the sun during outages.
What's included in every installation:
Get your exact quote — free, no obligation.
We'll confirm the right size, assess your electrical panel, and give you the exact all-in price for your home.
No spam. A Stellar team member calls within 24 hours.
How long each size runs your home.
All four sizes deliver 7.6 kW continuous output — enough to simultaneously power your fridge, freezer, furnace fan, lights, sump pump, Wi-Fi, phone chargers, and TV. The difference is how long they keep running.
| Appliance | Draw | 9.9 kWh | 13.3 kWh | 16.6 kWh | 19.9 kWh |
|---|---|---|---|---|---|
| Fridge + Freezer | 150W | ~66 hrs | ~88 hrs | ~110 hrs | ~132 hrs |
| Furnace Fan | 500W | ~20 hrs | ~26 hrs | ~33 hrs | ~40 hrs |
| LED Lights (10) | 100W | ~99 hrs | ~133 hrs | ~166 hrs | ~199 hrs |
| Sump Pump | 800W | ~12 hrs | ~16 hrs | ~20 hrs | ~25 hrs |
| Essential Bundle* | ~1 kW | ~10 hrs | ~13 hrs | ~17 hrs | ~20 hrs |
*Essential Bundle = Fridge, freezer, furnace fan, 10 LED lights, sump pump, Wi-Fi, and phone charger running simultaneously. Actual runtime varies with usage.
EP Cube by Canadian Solar.
The EP Cube is manufactured by Eternalplanet, a subsidiary of Canadian Solar — one of the largest solar and energy storage companies in the world. It won Japan's Good Design Award for its modular, stackable design.
Safest lithium chemistry. No thermal runaway risk. UL 9540A certified.
Waterproof and dustproof. Operates from -10°C to 50°C. Indoor or outdoor.
3.3 kWh modules. Expand capacity anytime. Up to 3 units in parallel for 59.9 kWh.
Battery
Capacity: 9.9 / 13.3 / 16.6 / 19.9 kWh
Chemistry: LiFePO4 (Lithium Iron Phosphate)
Module size: 3.3 kWh per module
Cycle life: 6,000+ cycles at 80% DoD
Warranty: 10 years
Inverter
Type: Built-in hybrid inverter
Continuous output: 7.6 kW
Switchover time: <20 milliseconds
PV input: Up to 4 MPPT, 16A per string
Warranty: 10 years
Installation
Location: Garage (attached or detached)
Mounting: Wall-mounted
Permitting: Included
Inspection: City inspection included
Workmanship warranty: 5 years
Pair your battery with solar.
Your EP Cube charges from solar panels during the day and powers your home at night — reducing grid dependence even further. Already have solar? The EP Cube integrates seamlessly with existing systems through its built-in hybrid inverter with 4 MPPTs.
Four steps. Done in 4–6 weeks.
Inspect electrical panel, verify location, confirm final price. Free, no obligation.
We handle all drawings, permits, and utility paperwork.
Mount, wire, connect to panel, configure switchover. ~1 day.
City inspection, activation, app setup. You're protected.
Battery backup FAQ.
The next outage isn't a question of if.
It's when.
Free assessment. We inspect your panel, verify your location, and confirm the exact price. No obligation.