Day/night arbitrage
Battery + night tariff: savings on the spread
Input
Savings
spread: 1,92 ₴/кВт·год
6 221 ₴/yr
- Savings/mo
- 518 ₴
- Battery payback
- 24,1 yrs
Night tariff (23–07) = 0.5× day with a two-zone meter. Charge at night, discharge by day: savings = kWh × (day − night/efficiency). Cycle efficiency ~90%. LiFePO4 pays back in ~4–7 years at a 2+ UAH spread.