01What Blask is and how to get it
Blask combines the weather forecast for your location with your installation’s parameters and the hourly energy prices published by PSE, the Polish grid operator. From that it shows how much energy you will produce today and tomorrow, and in which hours it pays most to use that energy at home.
The app has two modes. Blask Solar is for prosumers with a photovoltaic installation. Blask Charge is for owners of electric vehicles and home energy storage. You choose the mode once, on first launch.
Blask does not connect to your inverter, meter or car. You enter all parameters by hand, and live production data comes from satellite observations of solar irradiance at your location.
- iPhone: download from the App Store. Requires iOS 15.1 or later.
- Android: the Google Play version is in preparation.
- The app is completely free and available on the Polish market.
02Account: sign-up and sign-in
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Create an account
On the welcome screen enter your e-mail address and a password. The password needs at least 8 characters, one digit and one uppercase letter. Repeat it in Confirm password and tap Create account.
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Verify your e-mail address
We send a verification link to the address you entered. Open it in your inbox, return to the app and tap I've verified my email. If the message did not arrive, use Resend verification email and check your spam folder.
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Accept the terms
Read the Terms of Service and the Privacy Policy, tick the consent box and tap Continue. The full texts are also on this site: Terms and Privacy Policy.
Already have an account? Choose Sign in on the welcome screen. Your session stays active after you close the app.
Forgot your password? Choose Forgot your password?, enter your e-mail and tap Send reset link. Set a new password from the link in the message, then sign in again.
03Choosing your energy profile
After your first sign-in the app asks which profile you have. This decides which screens you will see.
- I have a solar (PV) system starts the PV installation setup and the Blask Solar dashboard (chapters 4–7).
- I have an EV or energy storage starts the charging profile setup and the Blask Charge dashboard (chapter 8).
- An option for users who have both kinds of equipment is in preparation. Until then one account holds one profile.
04Setting up a PV installation
Five short screens. Every value can be changed later in Settings.
The review screen, step 5. Example values.
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Installation location
Tap Use current location and allow the app to access your position. You can also type the coordinates by hand: latitude (e.g. 50.0647) and longitude (e.g. 19.9450). The location is used only to fetch the weather and irradiance forecast for your roof.
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Panel orientation
Azimuth is the direction the panels face: 0° north, 90° east, 180° south, 270° west. Tilt angle is the slope relative to horizontal: 0° flat, 30–35° optimal, 90° vertical. Both are set with sliders.
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Peak power (kWp)
Enter the installation’s power from 0.1 to 100 kWp. A typical residential installation has 3–10 kWp. You will find the value on the inverter’s rating plate or in the installation certificate.
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How your surplus is settled
Choose the scheme under which the energy you export to the grid is settled. This decides how we value your production and which hours we mark as best.
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Review and create the installation
Check the summary. The Edit button next to each item takes you back to that step. Tap Create installation. The first forecast takes a few seconds to calculate.
Settlement schemes
| Option in the app | Who it is for | How it works |
|---|---|---|
| Monthly average (RCEm) | Installations connected between April 2022 and June 2024 | Surplus is settled at a fixed monthly market price published by PSE around the 11th of each month. |
| Hourly prices (RCE) | Installations from July 2024, or a voluntary switch | Surplus is settled at current market prices that change through the day. |
| Net-metering (opust) | Installations connected before April 2022 | Surplus is credited back at 80% (up to 10 kWp) or 70% (above 10 kWp), to be used within 12 months. |
05The “Energy Overview” dashboard
The dashboard is the main screen of Blask Solar. It opens on every launch and walks through today from top to bottom: what you have produced so far, what it is worth, when to use energy, and how accurate the forecasts are.
The Blask Solar dashboard. Example values.
The header shows your coordinates and installation power. The ↻ icon refreshes the data and ··· opens Settings. The See Today & Tomorrow forecast button leads to chapter 6.
Today — your production New in 1.1
Example values.
The card shows the energy produced from dawn until now, derived from satellite data. The LIVE badge states the data delay, usually around 20 minutes. Below the value you see a comparison with the morning forecast: ▲ above, ▼ below or ● in line with the forecast when the difference is within ±10%.
- Early in the morning the comparison is replaced by a note that data is still arriving. The full picture of the day appears within a few hours.
- The mini chart joins the hours that have passed (full colour, actual production) with the forecast for the rest of the day (dimmed).
- Calibrated to your installation means forecasts are corrected with a factor computed from your production history.
- The card stays hidden until live production data exists, for example right after creating the installation.
Tiles: value and peak hour
Example values.
- Estimated value is today’s forecast production expressed in złoty, calculated under your settlement scheme.
- Peak hour is the start of the best self-consumption window of the day.
- With RCEm settlement an extra tile Monthly avg (RCEm) shows the running monthly average price in PLN/kWh and the number of days it was computed from. The “×1.23” note means the rate includes VAT.
- With net-metering the Opust ratio tile shows 80% or 70% depending on the installation size.
Optimal self-consumption windows
Example values, shown with the low-confidence banner.
A list of the three hours in which it pays most to run the washing machine, dishwasher, heat pump or car charger. Each hour shows the forecast production in kWh and the grid energy price. The #1–#3 order is a ranking of benefit: high production at a low selling price means you are better off using the energy than exporting it.
Forecast confidence New in 1.1 is assessed daily from the weather. At medium confidence a note under the list says the forecast may shift today and is worth checking again later. At low confidence a banner above the list reads Cloudy day today or Less to gain today, with an estimate of what share of your best day today’s production will reach.
Hourly — energy vs price
A bar chart of the whole day: bar length is the energy in that hour, the number on the right is the grid price in PLN/kWh. When live production data is available, a Forecast / Today's production switch appears above the chart. In the production view past hours show actual values while future hours remain forecast and are dimmed.
Forecast quality New in 1.1
Example values.
The card compares forecasts with your installation’s actual production. For the first week after creating the installation you see Calibration in progress with a progress bar: we need 7 days of observations to assess accuracy. After that the card shows:
- Accuracy 30 days: the average forecast accuracy over the last month.
- Last day: the accuracy of yesterday’s forecast. When full data is missing you are asked to check back tomorrow.
- Bias: the direction of the error. A value below 1 means forecasts underestimated production, above 1 that they overestimated it. The sentence under the metrics says it in plain words.
06Today and tomorrow forecast
Open the Forecast screen from the dashboard button. It has two tabs, Today and Tomorrow. Switch by tapping or by swiping sideways.
The forecast screen, “Today” tab. Example values.
- Forecast total is the day’s energy in kWh, with the number of productive hours underneath.
- Optimal self-consumption windows work exactly as on the dashboard. On an overcast day the list may be empty, in which case you see a message that no optimal windows are available for that day.
- Hourly forecast lists every hour with energy and price. Tomorrow’s prices appear once PSE publishes them, usually around 2:30 PM.
07Notifications
Blask sends one notification a day with tomorrow’s best self-consumption window. There are no ads and no marketing notifications.
- On first sign-in the system asks for notification permission. Without it the app works normally, but the daily alert will not arrive.
- The default alert time is 17:00. In Settings → Notifications you change it with the − and + buttons between 6:00 and 21:00, and turn the alert on or off with the Daily forecast alert switch.
- If you declined permission earlier, enable it in your phone’s system settings: Settings → Blask → Notifications.
- Blask Charge additionally lets you set a one-off reminder for the start of a charging window (chapter 8).
08Blask Charge: EVs and home batteries
This mode finds the cheapest charging windows from PSE RCE hourly prices and the parameters you enter by hand. The app does not control your charger or car; it tells you when to start.
The Blask Charge dashboard. Example values.
Setting up a charging profile
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Vehicle or storage
Pick a model from the list of the most popular electric cars in Poland (e.g. Tesla Model 3 and Model Y, Volkswagen ID.3), choose Other / enter manually and type the battery capacity in kWh, or choose Energy storage and enter your home battery’s capacity.
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Charger power
Four typical values: 3.7 kW (home socket), 7.4 kW (single-phase wallbox), 11 kW (three-phase wallbox), 22 kW (fast wallbox). You can also enter your own power. You will find it in the charger’s spec sheet or installation contract.
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Charging goal
Set the target charge (default 80%), the current charge (default 45%) and the Ready by time (default 07:30), the latest moment charging must finish. Choose an optimisation mode. These are session defaults; you can change them on the dashboard.
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Review
Check the summary and tap Create charging profile. The app immediately searches for the cheapest windows.
Optimisation modes
| Mode | What it does |
|---|---|
| Smart | Finds the cheapest hours that reach your goal before the ready-by time. The default. |
| Economy | Charges only when the price is below a threshold. If there are not enough such hours, the app shows a warning. |
| Fast | Charges from now at maximum power, without waiting for cheaper hours. |
The Blask Charge dashboard
- Cheapest price and Current price in PLN/kWh, plus the Prices for the next 12h chart.
- Best window with start and end time, the number of charging hours to reach the target and the energy in kWh, together with the Estimated cost of the session in złoty. Below it a countdown Starts in … or the note You can charge now.
- Set reminder creates a one-off notification for the start of the window.
- Negative prices ahead is a separate banner: in those hours you charge for free or get paid.
- Battery charge: tap Update charge level and set the current level with the slider; the recommendation recalculates. Once the level reaches the target, the card says the battery is already charged.
- Optimisation mode can be switched directly on the dashboard. If there is not enough time to reach the target, the app shows the best available window and a clear warning.
- See prices → opens the Energy prices screen with Today and Tomorrow tabs, the lowest price of the day, the daily average and an hourly list colour-coded cheap, mid and expensive. Tomorrow’s prices appear after the PSE publication, around 2:30 PM.
09Settings and account
Open Settings with the ··· icon in the top-right corner of the dashboard.
| Section | What you will find |
|---|---|
| Account | Your e-mail address and verification status. |
| Installation | Location, azimuth, tilt, peak power and settlement. The Switch to Hourly RCE link changes settlement from RCEm to RCE after confirmation. The change is irreversible because it mirrors a permanent change of your grid contract. |
| Edit installation | Walks through the chapter 4 setup again with your current values pre-filled. After saving, the forecast is recalculated. |
| Notifications | The daily alert switch and delivery hour (chapter 7). |
| Support | Change password sends an e-mail with a password reset link. Sign out ends the session on this device. |
| Delete account | Permanently deletes the account together with the installation, production history, forecast accuracy data and charging profile (in line with GDPR). It requires confirmation and cannot be undone. |
10Troubleshooting
After opening the verification link the app still says “Not verified yet”
Open the link on the same phone or in any browser, wait for the confirmation page, and only then tap I've verified my email. If the link expired, request a new one with Resend verification email.
The app cannot get my location
Enter the coordinates by hand. You will find them in a maps app: press and hold on your roof and the app shows latitude and longitude. Accuracy of about 100 m is more than enough.
The dashboard says “Could not load forecast data”
Check your internet connection and tap Retry or the ↻ icon. If the problem lasts longer than a few minutes, write to us.
I cannot see the “Today — your production” or “Forecast quality” cards
Both cards need data from your installation. Live production appears during the first day after setup, once satellite data arrives. Forecast quality needs 7 days of observations; until then you see the calibration bar.
No prices for tomorrow
PSE publishes next-day prices around 2:30 PM. Until then tomorrow’s production forecast is available, but without prices and without charging windows.
I am not receiving notifications
Check that the alert is enabled in Settings → Notifications and that your phone allows notifications for Blask in its system settings. After signing in on another device, notifications go only to the phone you used last.
Dashboard values differ from my inverter’s readout
Blask does not read your inverter. Production is estimated from satellite irradiance and your installation parameters, so differences of a few to a dozen percent are normal. After a few days of observations the app calibrates forecasts to your installation, which narrows the gap. Also check that azimuth, tilt and power in Settings are correct.
11Glossary
- kWp
- Kilowatt-peak: the installation’s maximum power under ideal conditions, stated on the inverter’s rating plate.
- kWh
- Kilowatt-hour: an amount of energy. A 5 kWp installation produces around 25–30 kWh on a sunny summer day.
- Self-consumption
- Using your own energy at the moment it is produced instead of exporting it to the grid. Usually more profitable than selling the surplus.
- Self-consumption window
- An hour in which high production combined with a low selling price gives the largest benefit from using energy at home.
- RCE
- Market energy price: the hourly price published by PSE, used in net-billing since July 2024.
- RCEm
- Monthly market energy price: the month’s average price, used in net-billing for installations from 2022–2024.
- Net-metering (opust)
- The older settlement scheme in which surplus returns to the prosumer as an energy credit at 80% or 70%.
- PSE
- Polskie Sieci Elektroenergetyczne, the transmission system operator that publishes RCE and RCEm prices.
- Azimuth
- The direction the panels face, in degrees: 180° is south.
- Tilt
- The angle of the panels relative to horizontal. In Poland 30–35° is optimal.
- Bias
- The ratio of forecast to actual production. Below 1: forecasts underestimated; above 1: overestimated.
- SoC
- State of charge: the battery level in percent.
Something missing from the guide?
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