The topic of funding is nowadays, especially in connection with KfW funding, not infrequently an annoying issue.
For example, in connection with the acquisition of a battery store, the KfW subsidy program 275 is offered, which provides an amortization subsidy for the acquisition costs. You have to apply for
this program through your bank or a credit institution.
At the very latest when you only apply for a financing equal to the repayment allowance (which will be canceled immediately after approval), many credit institutions lose interest in an
implementation because nothing is to be earned for them.
A really fast and unbureaucratic help is the online application at the SWK-BANK, For example, via the battery manufacturer SENEC.