City energy storage power station cost budget plan

The expense associated with constructing an urban energy storage power station varies widely based on several factors, notably 1. technology type, 2. capacity requirements, 3. location, 4. installation costs. On average, the overall investment ranges from $200 to $800 per kWh of storage capacity. [pdf]

How about free photovoltaic panels

In short, there is largely no such thing as “free solar panels” in terms of government grants that will cover 100% of the installation costs. [pdf]