The best investments are in deposits and government bonds. I live in Poland, here, for example, there is an option to invest in deposits at the rate of inflation, it does not save you what the law in most cases, but at least it helps quite significantly without the risk of losing money.

Isn't it better to buy some photovoltaic kit from China for a little money than to risk legal consequences, especially in Russia? Although, since you live in Russia, rather with the sun will probably be a problem.