How do we size the system for future growth without overspending now?

Split solar from storage in the sizing decision.

1. Oversize the solar array now — panels are relatively cheap; fill available roof and ground space
2. Install a lean battery bank — size for current occupancy plus a modest buffer; batteries are the expensive layer
3. Choose a modular platform — add battery modules later without replacing inverter infrastructure

Example: a 3-bed property might launch with 15 kW solar, 54 kWh storage, and 16 kW inverter capacity — then add battery modules when occupancy rises or EV charging lands. Solar and inverter headroom are already there.

You buy flexibility now without paying for kWh you don’t need yet.