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0 points543g43g433y ago0 comments

>A new panasonic or jinko mono panel installed in india has epbt under 6 months and an eroi around 100.

I certainly haven't made any claims as specific as this without any backup!

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3 comments · 1 top-level

You claimed solar has too low EROI to be viable.

Prove new solar in a median location is lower EROI than the median for new gas using up to date info on the whole process and solar cells you would buy for a project started now such as 155 micron wafer mono PERC.

543g43g43OP3y ago

>You claimed solar has too low EROI to be viable.

Nope, I said that it's lower than other sources of power, and thus an energy economy based on solar will look very different than what we currently have.

Given that electricity represents a relatively small percentage of our power usage, in the majority of cases (materials manufacture, industry, heating, etc), the EROI of renewables will be worse than fossil fuels.

Schroedingersat3y ago

Prove that thermal energy from shale oil or tar sands is higher EROI than that same solar panel using a resistor or arc furnace then.

Then add heat pumps and PV+Heliostat or PV+CSP derived hydrogen compounds to your equation and realise that adding heat and chemical stocks shipped from distant places to the equation makes it favour renewables even more as you can turn 120MJ of electricity and 40MJ of direct sunlight at Chile's 35% capacity factor into 120MJ of hydrogen or 100MJ of Ammonia you don't have to refine. With the heat pump you'd get more low grade heat even if you burnt the fossil fuel for electricity.

Wind + PV is a pure upgrade from an EROI perspective, and electrolysers and CSP are following very close behind.

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