History repeats itself…
in 1956 the BTC negotiated with Scottish power to charge 0.75d per unit to charge 79998/9 (later Test Unit Gemini) a 2 car Battery powered Derby lightweight to run on the Aberdeen Ballater line.
I understood it could manage around 100 Miles on a charge, but was charged at each end of the line.
(railcar.co.uk website).
Gemini is still with us, and in Scotland too.
I dont know its performance today, but back in the 1980’s Ive ridden on it for upto 40 miles on a charge using its aging batteries then.
(someone keep me honest and check my maths)
Genini works Based on 440v x 1000amps = 440,000 watts, (440kw) and 0.75d per kw charging, (with inflation from 1956 to today is about £2.10 per kw) / 100 mile range… 21p per mile, Gemini is still more economical than a Class 230…
For the 230, Based on the quotes of £2.20 a mile, c60 mile range, and reported (wiki) 4*106kw batteries at 750v to operate… the operating characteristics are similar, its batteries cheaper, but its per mile cost considerably higher.
it does have some efficiences though, according to Rail Engineer the 230’s battery/genset is c3 tons, Geminis was over 30 tons. Its batteries cost £50k in 1956, thats just over £1mn in 2021.. Vivarail wins on that, Rail Engineer suggests is £100k, though only a 7 year life… when I was on Gemini its batteries were 30 years old and still half life.
Summice, in 65 years, weve reduced the upfront cost & weight of the battery, at expense of the operational range and battery life.. but still not progressed technology beyond a 2 car unit running on test in Scotland…
its a pity Gemini isnt in Glasgow this week, it’d certainly give the 230 a run for its money… if Gemini had the batteries of the 230 replacing the size/weight space it’d straight beat the 230 into the ground in operational range and cost… its not too late to try it, and Gemini does need new batteries I understand.