https://news.yahoo.com/minister-germany-plans-5-5-153236389.html
Germany plans to provide Ukraine with 5 billion euros ($5.5 billion) in annual military aid until 2027, German Finance Minister Christian Lindner said on Aug. 14, Forbes Ukraine reported.
Germany has the strongest economy in Europe. The debt compared to the GDP is half of what the US has. And I guess a lot of the money goes directly back into it's own industry, since they are a big military supplier. They can easily afford it.
Realistically, they're giving Ukraine their old stocks and modernizing, something the Bundeswehr and NATO have been calling for for years.
So, if you are wondering how out of date some of their hardware is in Germany, NPR did a story. During NATO joint exercises, German infantry had analog radios that just weren’t compatible with the other units. The bureaucracy is massive in procurement, ostensibly to prevent the rise of an imperialist army (again). It’s like 18 offices a form has to pass through——each with own requirements.