Germany gets 85% of it's electricity from renewables, HI and CA are not even close. Germany doesn't have as favorable location for photovoltaics as either HI or CA so they have focused their renewables on other forms. Makes complete sense. The explanation that German photovoltaic was "over-subsidized" doesn't have any merit.
Um, no.
Only 30% of German electricity comes from renewables (including 6% solar energy), 70% from fossils or nukes. About 40% in 2016 came from hard and soft (lignite) coal.
https://en.wikipedia.org/wiki/Energy_in_Germany#/media/File:Power-generation-germany_2016.png
Their carbon intensity for electricity was about 560 g CO2/ kWh, in 2016, not too bad.
Many US states, like California and NY, have greener electricity:
https://www.quora.com/How-much-CO2-is-produced-per-KWH-of-electricity
CA is at 300 g CO2/kWh
NY is at 410 g CO2/kWh
TX is at 540 g CO2/kWh (as green as Germany)
CA source breakdown is here:
http://www.energy.ca.gov/almanac/electricity_data/total_system_power.html
CA in 2016 is at 40% renewable (with hydro), with solar at 10% annual energy production (not capacity fraction) and growing fast.
Note that the combined size of the CA and NY economies is about the same as Germany. And they got there with a lot of help with cheap natural gas (that Germany does not have access to) and better renewable resources and a lot LESS expensive incentives.
Lastly, Solar WAS a large part of the German energy revolution plan, simply b/c there is not enough room for enough wind to get to 100% renewable electricity (let alone 100% renewable primary energy), which was the stated goal. They were well aware that b/c of the poor solar resource, they would need to install and pay 2-3X as much for a kWh than folks in the US or Spain. They proceeded anyway, with production credits that were $0.50-0.75 per kWh, well above retail rates (and 20X the wind production credit in the US). Waves of PV were installed 2010-2013, when PV was far more expensive than today.
But the rich production credit broke the budget, the incentives were scaled back (sometimes breaking contracts with folks that had installed PV earlier), and the rate of new installations has fallen to a low level, despite PV hardware prices collapsing.
A nice graph can be found at:
https://www.energy-charts.de/power_inst.htm?year=all&period=annual&type=inc_dec