Adding a battery
“I already have solar and I am wondering whether storage is worth adding.”
7 steps, 2 written so far. Covers Batteries, Payback, Tariffs and export.
Not written yet
Retrofitting has different economics to buying together.
- What the solar ROI calculator actually models
A battery is only worth what it stops you importing.
25 July 2026 · 6 min read
Not written yet
Usable capacity, not the number on the box.
Not written yet
Size to the evening load, and see where bigger stops paying.
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The tariff can matter more than the battery.
Not written yet
What you are buying is cycles, and they run out.
- What the solar ROI calculator actually models
Budget the second battery before buying the first.
25 July 2026 · 6 min read