@pauleastwood this is a thing people often forget indeed.
We don't just need to replace our current electricity production with carbon-free sources, but scale it up by a factor of at least three to accommodate those two other huge sectors!!
For solar and wind that would mean hilarious amounts of battery storage to get us through downtimes too, and I am kind of afraid that this is a perfect problem to ignore until it's way too late and we realize that we need to backtrack - much like Germany currently is dealing with high prices and major CO2eq/kWh
@xaseiresh batteries are one tool amongst many that can be used for power system balancing, such as pumped hydro, hydrogen, and sand even! Demand side responses also important.