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Hot roof, fewer watts

The label says 440 W. The July roof says about 389 W. Not broken, just hot: at −0.29 %/°C, cells at 65 °C lose around 11.6 %.

Bifacial gain: datasheet vs field

The datasheet says +25 %. Measured in the field: +8.9 %. A real gain, just not 25 %.

Solar kWh per person

Capacity shows what is installed. Generation shows what it delivers. World average 2024: 263 kWh per person, up from 27 in 2014.

Cold morning, high voltage: Voc in winter

24 modules are fine at 25 °C, but over 1000 V near freezing. Design the string on its coldest-day open-circuit voltage.

QUESTION SOLAR: You asked. We answered.

Got a solar question? Modules, inverters, storage, sizing, winter yield. From professionals, for professionals.

Sunny noon, inverter drops out: grid overvoltage

Is the inverter the problem? Usually it’s the street. Log the voltage at the meter, then talk to the grid operator.

The power race in 30 seconds

PVDIS reshare of the solar race video: the power race in 30 seconds.

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LinkedIn-Beitragsstatistik, Stand 3 Nov 2026

Solar race in 20 seconds

Real generation data, year by year. Solar didn’t win the argument. It won on price. Winter is still real, so we plan solar plus storage.

Wet morning, inverter won’t start: low insulation

Broken? Not necessarily. Modules sit in parallel, so insulation resistance divides across the array.