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SolarLab

Battery22%

Measured

Panel by panel

Twelve of the 24 panels have their own optimiser, so each one is measured on its own. Here they are on a photo of the frame, right now or over any period you choose.

21 October 2026

Right nowor a period:
Panel 1, monocrystalline. 373 Wh over 21 October 2026, 1.33 kWh per kWp, measured for 5.9 hours.M1373 WhPanel 2, monocrystalline. 378 Wh over 21 October 2026, 1.35 kWh per kWp, measured for 6.0 hours.M2378 WhPanel 3, monocrystalline. 366 Wh over 21 October 2026, 1.31 kWh per kWp, measured for 5.9 hours.M3366 WhPanel 4, monocrystalline. 343 Wh over 21 October 2026, 1.22 kWh per kWp, measured for 5.9 hours.M4343 WhPanel 5, monocrystalline. 330 Wh over 21 October 2026, 1.18 kWh per kWp, measured for 5.9 hours.M5330 WhPanel 6, monocrystalline. 309 Wh over 21 October 2026, 1.10 kWh per kWp, measured for 5.9 hours.M6309 WhPanel 1, polycrystalline. 387 Wh over 21 October 2026, 1.41 kWh per kWp, measured for 6.0 hours.P1387 WhPanel 2, polycrystalline. 388 Wh over 21 October 2026, 1.41 kWh per kWp, measured for 6.0 hours.P2388 WhPanel 3, polycrystalline. 382 Wh over 21 October 2026, 1.39 kWh per kWp, measured for 6.0 hours.P3382 WhPanel 4, polycrystalline. 371 Wh over 21 October 2026, 1.35 kWh per kWp, measured for 6.0 hours.P4371 WhPanel 5, polycrystalline. 369 Wh over 21 October 2026, 1.34 kWh per kWp, measured for 6.0 hours.P5369 WhPanel 6, polycrystalline. 350 Wh over 21 October 2026, 1.27 kWh per kWp, measured for 6.0 hours.P6350 Wh
The tilted frame seen from the lawn, photographed on 17 September 2026. Each panel carries what it produced over 21 October 2026.
Tint: energy per kilowatt peak, compared with the best of the twelve over this period.under 80 %80 to 90 %90 to 95 %95 to 99 %99 % and over

How even is each row

How much less the weakest panel of a row produces than the strongest, in percent of the strongest. This is a calculation made from the twelve measurements above, not a measurement of its own.

The six panels of a row see the same sky, so they should produce about the same share of their peak power. One that falls behind points to shade, dirt, snow or a fault. Over a period, a passing cloud no longer matters.

Upper row, monocrystalline

Strongest
M2, 1 349 Wh/kWp
Weakest
M6, 1 103 Wh/kWp
Difference (calculated)
18 % less

6 of the 6 panels of this row answered. The weakest, M6, produces 18 percent less than the strongest, M2 (1 103 Wh/kWp against 1 349 Wh/kWp). Over a period, a difference above about 5 percent deserves a look at that panel.

Lower row, polycrystalline

Strongest
P2, 1 412 Wh/kWp
Weakest
P6, 1 272 Wh/kWp
Difference (calculated)
10 % less

6 of the 6 panels of this row answered. The weakest, P6, produces 10 percent less than the strongest, P2 (1 272 Wh/kWp against 1 412 Wh/kWp). Over a period, a difference above about 5 percent deserves a look at that panel.

How to read these numbers

  • Direct current, before the inverter. The inverter loses a few percent, so the sum of these panels is more than the lab delivers. The real production is on the live page.
  • The vertical array is not shown. Its twelve modules have no optimiser, so they are only measured together, as array 3.
  • Read through Tigo. The optimisers report to the Tigo cloud and this site reads the values from there.

Each panel's history can be charted and downloaded on the data page. The three arrays are compared on key figures and records.