Many Battery Add-On Requests Do Not Actually Need a Battery

For older California solar systems, the problem is often not storage. It is that the system simply no longer produces enough energy.

A lot of homeowners with pre-2023 solar assume their rising bills mean they now need a battery. In many cases, that is not the real problem.

If the system was built under NEM 1.0 or 2.0, the grid already acts like a very large shared storage resource during that tariff window. The issue is often that household usage has increased while solar production stayed flat.

In those situations, adding more solar can matter far more than adding a battery. The right answer depends on the system’s tariff position and current load growth.