Solar Power

All about solar power systems, and solar roadways.

EEVblog 1487 – Do Solar Micro Inverters Take Power at Night?

How much power do Enphase and other solar micro inverters draw at night time when switched off? It’s actually a very interesting question involving real and apparent/reactive power, the system topology, and whether your storage battery is on-grid or off-grid, and also its efficiency curve. Let’s measure it, do some ...

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EEVblog 1426 – This Problem can DROP Solar Output by 20%

Dave tracks down why his old 3kW system that was moved was now showing a 20% drop in output power at the same time every day. Is it inverter temperature, inverter mains voltage, solar panel cracking, dodgy connection resistance, or shading? Forum: https://www.eevblog.com/forum/blog/eevblog-1426-this-problem-can-drop-solar-output-by-20/ Podcast: Download

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EEVblog 1390 – NEGATIVE Household Solar Consumption? WHY?

Dave explains a common inherent measurement problem in the solar industry with having two seperate solar power systems and monitors on the one house. Why is Dave’s household consumption going NEGATIVE on both his older Solar Analystics system and new Enphase Envoy system? And why does the consumtion follow the ...

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EEVblog 1389 – Spanish Solar Pavement STUPIDITY

A government in Barecelona Spain has paid 30,000 euro for a 9kW solar pavement from Platio. This perennial favorite topic never ceases to provide debunking entertainment! Forum: https://www.eevblog.com/forum/blog/eevblog-1389-spanish-solar-pavement-stupidity/ Podcast: Download

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EEVblog 1386 – 295W Inverter vs 370W Solar Panel – WTF?

Why do Dave’s new 370W LG solar panels use lower rated 295W Enphase microinverters? What gives? Inverter clipping, solar panel overrating, DC/AC ratio, solar irradiance, and microinverter underrating explained. And a look at data from Dave’s old 3kW system to predict how many days a year the new 5kW system ...

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