Comment on Solar + Battery (covering 97% of demand) is now cheaper than coal and nuclear
psud@aussie.zone 1 week agoThe diagram shows that they fall short on winter mornings
My own modelling to decide what size battery I want for my house says it’s easy almost every day, but when you have three rainy and overcast days in a row you need a battery far larger or an alternative. For me the alternative is the grid; at grid scale it’s gas generators
wewbull@feddit.uk 1 week ago
If somebody has to keep that gas generator serviced only to run it on winter mornings, that electricity is going to be very pricey.
psud@aussie.zone 1 week ago
Indeed, but cheaper than enough batteries to cover those times
In the off grid home scale one I’d size and set the generator to run for several hours in a row to fully charge the battery on days when the battery was at a sufficiently low charge entering the night, at least that’s what my current modelling suggests. Diesel gensets work best when running fully loaded for at least long enough to warm up