Answers lies partly in your questions itself .
Because questions and answers are interdependent , I will try to summarise!
Tesla had the first movers advantage of producing electric vehicles with Li ion battery in large numbers even before pandemic…set up the supply chain for EV…
Toyota, Hyundai , Honda had the Hydrogen technology since decades, considering that it is the ideal zero carbon vehicle…they have been selling these cars since decades all around the world, though the cost was much higher than that of EV…now BMW , Audi have quickly developed hydrogen cars in Europe …they already had design proto’s.
Hydrogen Vehicle absolutely zero carbon emission …EV battery requires charging with electricity produced by thermal power plant…so carbon emissions are involved indirectly.
Even if we have 100% renewable electricity to charge lithium ion battery, still lithium ion battery is a scarce material…so not sustainable
…however if sodium ion battery or any other new sustainable Battery is commercialized, and if a country has 100% renewable , then may be EV could also be sustainable…
EV vehicles - technology is less complex to manufacture …was already there in india since last 15 years. Tata Motors & Leyland supplied EV to DTC and BEST in 2008-2010… Only issue is the supply chain of Li ion battery …only China is leading supplier… fulfills 80% of Global requirement …and only 1-2 countries have Li cobalt mines…so much so Li ion battery cost constitutes 30-40% of EV cost.
Hydrogen vehicles …technology though available with some of our OEM’s , but scaling it up, commercializing could take time due to cost factor for price sensitive Indian consumers.
With this back ground in mind , post pandemic two things have happened :
(1) Every country wanted to expedite its Carbon Emissions reduction program… …timelines and targets squeezed …rush for EV …as technology was readily available in all countries…and hydrogen technology was available mainly with Japan and Korea …
All depended on lithium ion battery which was readily available with China.
(2) Then people now realise supply disruptions on lithium ion battery from China could be a big issue …due to heavy rush for EV…
It is only by hindsight…post pandemic …in the mean time China also could smell that lithium ion battery not sustainable… though they have a small lithium mines, still they have to import lithium cobalt from countries like Congo…so to maintain their leadership position, they developed a more sustainable first sodium ion batteries in July 2021…now they have upgraded the sodium ion battery and filed patent this month …the latest design seems to be at par with lithium ion battery …
Now , we also have sodium ion battery technology in India which Reliance has bough a start up…but scaling it up and execution is the key…other nations also working on sodium ion battery …
So to sum up Indian scenario:
(1) EV is already here in india …hydrogen switch can not be done overnight…however in my opinion EV with Li Ion battery may carry risk of intermittent supply chain disruptions with lithium ion battery …if sodium ion battery is developed fast or some other sustainable battery technology comes up , then EV may also catch up very fast in coming years.
(2) Perhaps, anticipating EV supply chain disruption, our Govt has started pushing for ethanol flexi with BSVI…so ethanol stories is likely to play out well given the govt push and a lot of potential to produce Ethanol.
(3)Hydrogen Vehicle…OEM are taking up…gradually …will make its way sooner or later.
(4) Solar, Wind Power energy may be considered as main investments bets- they can produce green hydrogen with forward integration …Green Hydrogen in turn could be used in many ways including producing electricity…Hydrogen Automobiles is one of them… if you refer to my previous posts …
If you want to get some insights on world hydrogen companies …you may please read this two articles …
https://finance.yahoo.com/news/9-best-hydrogen-fuel-cell-160312564.html7bh
Discl : I have investments in Renewables, Green hydrogen story, Ethanol, CNG , Auto Ancillary ( Engine neutral ), IT (ER& D), EV (reduced allocation) . …It is not an investment advice …This is my personal views …I may be wrong.
Please do your own assessment before investments