From Derek Bolton, Sydney, Australia
Liz Bell worries that tapping electric vehicle batteries at night as a means to provide grid storage will mean they aren’t fully charged in the morning (Letters, 25 September). The main problem a renewables grid has is with demand in the evening. For the UK, with plentiful wind, there will be time enough to power up all the cars between, say, 11pm and 6am.
Here in Australia, we will have a higher share of solar. Everyone charging vehicles overnight will perpetuate demand for fossil fuels, while an excess of supply in daytime will undermine the profitability of solar farms. We need it to be easy to recharge EVs in the daytime, at commuter car parks and shopping centres.
