Where did you get the 30%-Figure from?! HVAC-transmission at “only” 380 KV is at about 1% loss, HVDC is even lower than that.

H2 needs to be produced with electrolyses, you lose 30% of your energy with that alone.

Por que no los dos? In the case of germany, 60% of agricultural Land is used for feeding live stock. 10% is used for “energy plants” - With a yield ~50 times lower than an equivalent pv-area. You’d need 5% of all of the agriculturally used Land to be fitted with solar panels to fulfill the electrical energy demand of germany. It’s frankly just stupid that we don’t try to go for that.

Don’t know the numbers for austria, but i assume they are simmilar.