EDMONTON HOME BATTERY · Master Electrician #13824 · CEIP-02428

How long will your battery actually last?

Pick your bank. Add your loads. Watch it drain in real time. Add solar to top it back up during the day. No salesman math, no rosy assumptions.

1
Pick your battery bank

Good, better, best. Each card shows how long it runs a typical Alberta home on essentials (fridge, furnace fan, lights, router).

Entry bank

Start with an entry bank for blackout basics.

Whole home

step up to whole-home for a day and a half,

Premium

or go premium with a Powerwall 3 plus expansion for about three days.

Powerwall 3 note: Tesla’s inverter is built in. Our premium pick stacks one 13.5 kWh Expansion behind the leader, 27 kWh usable. Divide that by the 8.44 kWh essentials day this tool uses and you get 3.2 days. Run a bigger list, nearer 13.5 kWh a day, and you get two. That is the denominator this page used to leave out. Tesla allows up to three Expansion units behind one Powerwall 3, 13.5 kWh each, to a maximum of seven units in a system, so there is room to grow later. No second inverter needed. Powerwall 3 datasheet
Phase 2: backing up a detached garage or shop. Heated garage, shop, or workshop out back? We can size a second battery for the detached building on its own, sub-panel and all, so your tools, plug-in heaters, freezer, and door openers stay live through an outage. It is a separate phase from the house backup above. Tell us your garage load on the free assessment and we will spec it right.
Select a bank above to see your runtime
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No bank selected
Pick a bank
solar topping up
The difference-maker
Got solar panels? Turn them on.
Watch your battery go from hours to days. Sunlight has no fuel cost, so the refill costs you nothing. How much of a refill you get depends on the month.
Bank selected. Now add what you want to keep running below.
2
Add the appliances you want to keep running

Every tap drains the battery faster. The more you add, the faster the level drops and the less time you have. Watch the battery go down in real time.

Add your own appliance
Tap a preset to fill the fields below, or type your own. Watts and Hrs/day stay editable.
0
Appliances
0 W
Peak draw
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Runtime on selected bank
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Pick a bank above to see runtime
When the grid goes down
Blackout simulator timeline
Pick a bank above to see how the outage plays out hour by hour
Pick a bank and add a few appliances. We will show you exactly what is still running at hour 0, 6, 12, 24, 48, and 72.
3
The picks for your load

Every system ranked by hours of runtime on what you selected, good to best. One row carries a “Recommended for your load” pill, picked by peak draw and autonomy fit.

← Swipe to compare →

Solar pairing
Turn solar on above
Toggle solar in the panel above. We will show you how fast your roof refills this bank on an average Edmonton day, and how much grid power you stop buying.
EV charge equivalents
Pick a bank to see EV charges
This bank can fully charge a Tesla Model 3 or Model Y a specific number of times. Pick a bank above and we will tell you exactly how many drives you have stored.
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Full system breakdown

Toggle solar or an EV to see how the full picture changes: runtime, savings, and sellback credits.

Add solar panels
Your roof refills the battery through the day, no fuel cost
8 kW
Panels
→
Battery
→
Home
Phase 3: Add an EV
Drive on sunshine. Sell what you don't use back to the grid.
60 km
Solar
→
Battery
→
EV
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Home

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The people who already had us out

These are Google reviews, copied word for word. Real jobs, real names, nothing edited.

★★★★★
“Friendly, helpful and great group of guys to work with. Communicated well and worked into our time slot. They almost seemed like family. Did a great job and gave lots of information. They went over and above to make our journey into solar a great experience. Would highly recommend their business to everyone.”
Karen Charlton · Verified Google review
★★★★★
“I had an excellent experience with Raydn Renewables from start to finish. Dmitry was professional, knowledgeable, and took the time to explain the entire process in a way that was easy to understand.”
Norman Nguyen · Verified Google review

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Want a real number on this?

Want a battery sized to your actual load?

Two fields, no email needed. Dmitry runs a real load study against your panel and gives you a written quote. Master Electrician on every job, no subcontractors.

Master Electrician on the call. No subcontractors. No spam. No pressure.

Got it. Dmitry will call you within 24 hours.

Usually same day, first thing next morning at the latest. Prefer a different time? Call (780) 904-3462.

Skeptic Mode

The five questions Gary asks at the coffee shop

Cold weather honesty, real Alberta scenarios, generator math, solar stacking, and an honest read on the quote you already have. No hype. Just numbers.

01

Alberta winter cold-temp derate

Lithium loses usable capacity below freezing, and below zero it will not take a charge at all. Most calculators hide both. Set your garage temp. The readout shows what you lose, and every runtime on this page recalculates with it.

+20°C
Usable capacity 100%
Runtime impact No change
Charge window 0°C and up

Two measured anchors, nothing invented between them: full rated energy at room temperature, and about 80% of it at -10°C. Below that is extrapolated and marked est. Past -20°C no bank here is rated to discharge, and none of them charges below 0°C. Battle Born cold weather test

02

Real Alberta scenarios, one tap

Load a scenario, see the appliance set, watch the runtime calculator update. These are the four conversations we actually have with homeowners.

Tap a scenario to load it into the calculator above.

Dig Deeper · 3 more checks Generator math, rate reality, quote check Tap to unfold cards 03, 04, 05
03

Cost per backup day vs a generator

A generator burns fuel for every hour it runs. A battery does not. What a generator costs per day depends on your propane price and how many days your power is out, and we know neither about your house. So there is a real number on one side only.

Your selected battery $0.00 / day Pick a battery above to see the number
vs
Propane generator Fuel Runs only while there is propane in the tank. Day three of an outage, somebody is driving for more.

The battery figure is its published price midpoint divided by 3,650 days, so ten years of every day. The generator side is blank on purpose. It used to read $42.00 a day, which charged fuel for all 365 days while amortizing the battery over the same 365. That is not the same kind of number, so it came out. Bring us your propane price and we will do it properly on a site visit.

04

Solar plus battery: where the money actually is

Here is the part a battery pitch usually skips. On a two tier Solar Club plan you import and export at the same rate inside the same season. High season is 35.00 cents both directions. Low season is 5.90 cents both directions. So a battery does not earn you a spread on the energy.

High season, power out 35.00¢/kWh
High season, power in 35.00¢/kWh
Low season, power out 5.90¢/kWh
Low season, power in 5.90¢/kWh
$0 What a rate spread earns you on a Solar Club plan. Same rate both directions. A battery is bought for backup, not arbitrage.

Rates from the Solar Club July 2026 fact sheet, read 26 August 2026. EPCOR calls its own delivery charges largely fixed, so self consuming does not dodge much of those either. If someone quotes you a battery on savings math, ask them which rate they used in each direction.

05

Already got a quote? Let's check it.

Paste the kWh and price from any quote (ours, a competitor's, or that fly-by-night out of a van). Get an honest verdict on $/kWh and where it lands on the Alberta market.

Your verdict shows up here.

Per usable kWh, divided straight out of our own posted prices above: EG4 WallMount $378 to $434, Pylontech US5000 $548 to $636, Powerwall 3 plus Expansion $963 to $1,148, Powerwall 3 on its own $1,185 to $1,407. EP Cube is deliberately not on that list, because it is modular 9.9 to 19.9 kWh and its price range moves with its capacity, so one number for it would be invented. These are Raydn installed prices, not an industry survey. Ask any other installer to do the same division on their own quote.

Not sure which system is right for you?
We size battery systems for Alberta homes every week. A 15-minute call gets you an accurate number based on your actual usage data.
Honest quote in 24 hours
Or call us directly: (780) 904-3462

Prefer to research first? See the full battery storage guide →

What happens next

Three steps, no sales pitch.

  1. 1

    I call you back

    Same day, or first thing the next morning. You get me, not a call centre.

  2. 2

    I look at your panel

    On site, usually inside 3 to 5 business days. Circuits, panel capacity, where the battery mounts.

  3. 3

    You get it in writing

    One number for your house, permit and inspection included. Sit on it as long as you want.

Honest quote in 24 hours

Or call (780) 904-3462

Pair it to a solar system

A battery alone keeps the lights on. Solar plus battery is where the bill actually moves.

Run the solar number
Still paying the grid to fill this thing?
A battery without solar charges from the grid. You get backup power but still pay every time it refills. Add solar and the roof refills it through the day at no fuel cost, most of the year. See what your system would actually save.
See my payback
Got or planning an EV?
Battery plus solar plus an EV charger is the full system. Charge your car overnight from stored solar. Level 2, 40 to 50 km of range per hour.
See EV charger
Show your work How I calculated your runtime
Usable kWh
The real capacity you get to use, not the sticker number.Pylontech US5000 4.56 kWh usable, which is 4.8 kWh nominal at 95% depth of discharge, straight off the datasheet. This tool used to print 5.0 kWh for it, which was the sticker number rounded up, so it came down. EG4 WallMount 14.3 kWh, Tesla Powerwall 3 13.5 kWh, Powerwall 3 + expansion 27 kWh, EP Cube 9.9 to 19.9 kWh. Those four are the vendor usable rating and their depth of discharge has not been checked against each datasheet yet, so read them as the vendor number, not as verified. Pylontech US5000 datasheet
8.44 kWh
essentials baseline per day, fridge + fan + lights + router.Here is the arithmetic so you can check it yourself. Fridge 150 W for 24 h is 3.60 kWh. Furnace fan 500 W for 8 h is 4.00 kWh. LED lights 60 W for 8 h is 0.48 kWh. Router 15 W for 24 h is 0.36 kWh. That adds to 8.44 kWh, and those are the same four wattages the appliance buttons in this tool use, so the number and the buttons can never disagree. It is this tool's own assumption. It is not a published figure from a utility or a regulator, so do not treat it as one. Your load slider adds appliances on top of it, and your own last 12 months of utility data is the only number that is actually yours. This page used to also print an idle draw of 0.8 to 1.2 kWh per hour here. That was unsourced, and at 24 hours it works out to 19 to 29 kWh a day, which contradicts the 8.44 kWh above it, so it is gone.
4.5 hrs
peak sun hours per Edmonton day, at 0.80 system derate.Peak sun hours are a modelling input, so here is a measurement instead. My own 9.56 kW Edmonton roof has produced 31,581 kWh in the 47 months since September 2022. That averages about 22 kWh a day across every season, not the 32 kWh a day this page used to print. Best month was 1,358 kWh in July 2026. Worst was 3 kWh in December 2025. So yes, solar refills a battery during a summer daytime outage. In a December outage, plan as though it does not. Never size backup off an average day.
Peak kW
continuous discharge rating, the ceiling on what you can run at once.Powerwall 3 handles 11.5 kW continuous (whole home including EV charger and heat pump), and the expansion unit rides on that same inverter. Pylontech US5000 is 100 A continuous at 48 V, so 4.8 kW, with a 15 second surge rating of 121 to 200 A. This tool said 2.4 kW until August 2026, which was wrong by half and understated what the cheapest bank can actually carry. EG4 WallMount 8 kW and EP Cube 7.6 kW are still vendor figures, not datasheet checked. Exceed the peak and the battery trips offline. Pylontech US5000 datasheet
-20%
measured capacity loss at -10°C. Colder than that is extrapolated, and past -20°C the bank stops.Battle Born measured an LFP bank delivering about 80% of its room temperature energy at 13 to 18°F, roughly -10°C, averaged across three discharge rates. The same test could not recharge that bank at all at that temperature, because it sat below the 25°F charge limit the BMS enforces. This tool now runs a straight line from full capacity at room temperature through that measured 80% at -10°C, which works out to 0.667 points per degree, and it stops returning a number past -20°C. In an unheated Edmonton garage the real risk is not just holding less, it is a battery that refuses to charge. The temperature control now drives the runtime engine. Every hour, day, EV charge and hot tub figure on this page is recalculated at the temperature you set, and past -20°C the page says none instead of printing a number the bank cannot deliver. Battle Born cold weather test

If your numbers are different, adjust them. The runtime above updates live as you set the load, solar, EV and temperature controls. Signed: Dmitry Naboka, Master Electrician #13824. If you want this verified against your real panel and last 12 months of utility data, book a site visit. The audit is free.

Runtime is usable capacity at rated depth of discharge, multiplied by the cold derate for the temperature you set. The cold model is a straight line between two measured points, full capacity at room temperature and about 80% at -10°C. Past -20°C it reports a stop, and nothing here charges below 0°C. Solar uses Edmonton 4.5 sun-hours/day at 0.80 derate. Sellback subject to utility program. Tool for comparison only. We size systems on your actual usage data, free.

Battery runtime
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