Energy Stack / Battery storage
Layer 02 · Storage
A battery is the most expensive single decision in the stack and the one with the slipperiest payback. Capacity matters less than the shape of your day.
Sizing
The wrong answer is "as much as you can afford". The right answer is your evening load shape.
Chemistry
If the box is on a wall in your house, the answer is almost always LFP.
Hybrid
Tidy is not the same as reliable. What happens when one box has to do every job.
Payback
Including the bits the brochures leave out: degradation, round-trip efficiency, opportunity cost.
VPP
Octopus Tesla Energy Plan, ev.energy and others. Which move the needle and which are press releases.