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 %.
PVDIS
Blog
Short, practical notes on solar modules and supply in Europe. Written by the PVDIS team.
From our posts
Every post gets its own short article here. Each card links to the article and to the post on LinkedIn.
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.
- Impressions
- 34,714
- Members reached
- 25,506
- Video views
- 17,073
LinkedIn post analytics, read 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.
P-Man game
A small arcade break from the PVDIS team, playable in the browser.
Translations
Mattina umida, l'inverter non parte
Translation of: Wet morning, inverter won’t start: low insulation
Mokry poranek, falownik nie startuje
Translation of: Wet morning, inverter won’t start: low insulation
Manhã húmida e o inversor não arranca
Translation of: Wet morning, inverter won’t start: low insulation
Nasser Morgen, der Wechselrichter startet nicht
Translation of: Wet morning, inverter won’t start: low insulation
Mañana húmeda y el inversor no arranca
Translation of: Wet morning, inverter won’t start: low insulation
Articles
Steady module planning after the 2026 supply swing
Five calm habits that help installers handle the next market swing.
Two solar videos passed 300,000 impressions on LinkedIn
Solar won on price, and per person Australia leads: the two stories, with LinkedIn's own numbers as of 3 Nov 2026.
First articles coming soon.