Battery storage in Brazil: is it viable?

The answer is "it depends"!

What is the desired objective?

If the challenge involves a "short duration," then batteries can be highly attractive and convenient.

If, however, it involves a "long duration," an alternative—such as diesel or gas generators—is the better choice.

These conclusions are based on capital amortisation calculations factoring in the energy delivered and variable costs.

In other words, one must first determine the objective and then compare the available alternatives.