Is your export rate worth it?
Find the minimum export rate that makes selling battery energy worthwhile. Enter your rates, battery size, and current charge to instantly see your break-even — and whether your rate clears it after replacement cost and battery wear.
Pylontech US5000: 9.6 kWh · Powerwall 2: 13.5 kWh
From your energy bill · average UK home: 2,700–3,500 kWh/year
Uses your import rate as the cost basis for break-even
Current SoC
Reserve — keep for home use
Used as the charge cost when the battery was filled from the grid
Export rate (p/kWh)
Export window
Caps exportable kWh to what your inverter can physically push in the window
Fill in battery capacity, annual usage, export rate, and any required charge-cost details to continue.
Break-even is calculated from your battery's charge cost (divided by round-trip efficiency) plus cycle wear (£0.035/kWh). If charged from solar, the cost basis is 0p — only wear applies. Home draw is estimated from your annual usage. Not financial advice.