In all honesty thats like peeing in the sea to raise the water level. Solar is a million miles away from being close to do any meaningful charging whilst onboard a car. BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

we're talking home solar to charge your home battery and electric car, not charge the car itself, however, there are three solar cars coming to market soon:

the aptera:
https://www.washingtonpost.com/climate-sol...solar-car/
the lightyear one:
https://www.carmagazine.co.uk/car-news/fir...wered-car/
and a smart size one, the Sion
https://sonomotors.com/en/sion/ l=Oo\________/oO=l l:OolΞΞΞΞΞΞΞloO:l

Current
RANGE ROVER Vogue 4.4L SDV8 - 2013 - Indus Silver, on Almond.
RANGE ROVER Vogue 4.4L V8 - 2002 - ex-2003 G4 Challenge Event Vehicle, Stage 3: Australia
RANGE ROVER HSE 4.4L V8 - 2004 - one-of-one Overfinch
RANGE ROVER P38a 4.0L V8 - 1999 - ex-2000 TReK Event Vehicle: South Africa

Previous:
RANGE ROVER Vogue 4.4L TDV8 - 2012 - RANGE ROVER 3.6L TDV8 x3 - RANGE ROVER Td6 x1 - RANGE ROVER Classic 3.5L V8 x1

No I dont BB was talking about household solar panels - "The “smart” solution should include investment in developing more efficient solar panels and fitting them instead of sunroofs on all hybrid/ electric cars to help trickle charge the batteries." Hence my comment.

ok thanks.
that said, if one can use Solar panels at home or use an electricity provider that uses solar fields to charge his/her car and household electricity storage, then it's a win-win - here's a major evolution in the energy production world:

https://www.weforum.org/agenda/2021/07/ren...gy-source/

https://www.carbonbrief.org/solar-is-now-c...nfirms-iea l=Oo\________/oO=l l:OolΞΞΞΞΞΞΞloO:l

Current
RANGE ROVER Vogue 4.4L SDV8 - 2013 - Indus Silver, on Almond.
RANGE ROVER Vogue 4.4L V8 - 2002 - ex-2003 G4 Challenge Event Vehicle, Stage 3: Australia
RANGE ROVER HSE 4.4L V8 - 2004 - one-of-one Overfinch
RANGE ROVER P38a 4.0L V8 - 1999 - ex-2000 TReK Event Vehicle: South Africa

Previous:
RANGE ROVER Vogue 4.4L TDV8 - 2012 - RANGE ROVER 3.6L TDV8 x3 - RANGE ROVER Td6 x1 - RANGE ROVER Classic 3.5L V8 x1