Energy monitor measurement analyser
Load the CSV measurement history from an MEW-01 or MEW-02 energy monitor. I count usage day by day, show the hourly profile and compare costs across tariffs — on your own real data. The file never leaves your browser.
How to download the measurement file from Supla Cloud
- Sign in at cloud.supla.org — to the account your energy monitor is connected to.
- Go to My SUPLA → device MEW-01 / MEW-02 → channel „Electricity meter" and click „Download measurement history".
- In the download window set:
- Date range
- All (or „Selected" if you want a specific period)
- File format
- CSV
- Separator
- Comma
, - Value transform
- Counter (values exactly as on the meter)
- Click „Download measurement history" and load the file below. It may be zipped (
.zip) — you do not have to unpack it.
Picked a semicolon or a tab instead? That works too — I detect the separator automatically. Leave the other options as above.
Data settings (columns)
Drag across the chart with your finger or mouse to narrow the analysis range to the selected bars.
Parts of the day
How usage splits between night, morning, daytime and evening in the selected range.
Daily trend and forecast
Daily usage in the selected range with a 7-day moving average and a forecast for the current month of data.
I put two periods on one chart — the average hourly profile shows when usage changed, and the table below shows by how much. Periods are counted from the last measurement in the file.
Energy drawn from the grid next to energy fed into it (for example from solar panels) in the selected range. The meter does not see self-consumption — solar energy used straight away, which never passes through the grid.
One rate for every kilowatt-hour. The most accurate way: divide your last bill by the number of kWh used — that way distribution and fixed charges are included too.
The default 1.10 PLN/kWh is a rough average from the price lists of the largest Polish suppliers for 2026 (gross, distribution included; roughly 0.98–1.13 PLN/kWh depending on region).
Set out rates by hour and weekday and I will compare costs on your usage. In the zone rate enter the sum of the zone-dependent components (active energy + variable network charge), and put the surcharges added to every kWh and the fixed charges into „Additional charges". Copy the amounts from your latest supplier invoice.
The rates in new tariffs are only rough starting values (gross, distribution included, 2026 level). Before you compare tariffs, copy the rates and zone hours from your own supplier price list — checking the amounts you enter is up to you.
Energy cost
I compare every hour with your typical pattern for that time of day and that type of day (workday / weekend) within the analysis range set above, then show the periods that clearly stand out. Where there is too little data for a confident call, I would rather say nothing than guess. Changing the range at the top recalculates the results automatically.
App version: 1.6 beta