Settings

Cost, battery and DCF assumptions for every page.

Cost & Rebate

Fixed install ($)

Fixed component: electrician, switchboard, paperwork (~$2,500–3,500).

Variable ($/kWh)

Per-kWh component for cells/BMS ($600–900 typical).

Federal Tier 1 ($/kWh, 0–14 kWh)

Post-1 May 2026: Tier 2 (14–28 kWh) is 60% of Tier 1; Tier 3 (28–50) is 15%.

State / VPP rebate (flat $)

Battery assumptions

Battery life (years)

Synced with sidebars on Battery sizing and Quote pages.

Capacity degradation per year

Annual usable-capacity fade, entered as a percent.

Standby load (W, 24/7)

Quiescent power draw of inverter/electronics; valued at the plan's time-weighted import tariff.

Battery power limit (kW)

Shared power cap used for charging, discharge to load, and any intentional export.

DCF

Optimise for

Hurdle rate (%)

The return you'd want elsewhere to beat this battery. Synced with Battery sizing and Quote.

Import tariff growth (%/yr)

FiT is assumed flat over time in the current model.

Residual value at end (% of net cost)

Optional terminal-year credit (depends on whether you'll repurpose or sell the unit).