Business parameters
Set load, capacity and required backup independently
Scenario indexation
0% - calculation at current prices without a growth forecast.
SBEW BESS for business
BESS Payback Calculator
Estimate the economics of a battery energy storage system for a business in Ukraine.
BESS for business
100
kWh
50
kW
0.5P
power class
Tariff savings and outage backup in one hourly model.
Base business tariff
11.23 UAH/kWh
Charge price
6.15 UAH/kWh
Discharge price
18.14 UAH/kWh
Model horizon
15 years
Interactive model
Estimate budget, savings and backup for your business
Use strategy
Choose the main business task for BESS in the calculationArbitrage without export is behind-the-meter savings on own consumption. If export is enabled, surplus above own load is valued at the DAM market price.
Backup priority
Reliability: BESS keeps charge in advance before planned outages.
What this gives the business
Short business summary without technical details
Profile: shop, office, cafe or small production site
BESS 125/260 for backup and savings
The system reduces peak electricity costs and partly replaces diesel during outages.
Backup
up to 1.6 h
Year 1
Calculating...
Payback
Calculating...
Data quality and calculation assumptions
The model passport updates after API data is loaded
Tariffs
Waiting for API
Manual model is used until data is loaded.
Hourly model
SOC fallback
The annual DAM series has not been loaded yet.
Exchange rate
Manual rate
The NBU rate will be applied after loading.
Diesel
Manual price
Diesel price will be loaded from an open source.
CAPEX
Price list needs review
The FOB curve is based on a reference configuration.
Assumptions
DP + 8760/SOC
DoD 85%, round-trip efficiency 93%, resource by EFC.
Purpose
Pre-project estimate
Final specification after site audit.
Warnings will appear here if API data or the hourly series are incomplete.
Current tariff data
DAM data comes from the Market Operator; transmission and distribution from NEURC.
Manual model is used until current data is loaded.
The annual SOC model is waiting for hourly DAM prices.
DAM charge / base / discharge
960 / 5 193 / 10 948 UAH/MWh
Transmission
743 UAH/MWh
Distribution
2 825 UAH/MWh
All-in charge / base / discharge
6.15 / 11.23 / 18.14 UAH/kWh
Exchange rate and system cost
The CAPEX curve includes the fixed system part and variable price per kWh.
Manual rate is used until NBU data is loaded.
Configuration
260 kWh / 130 kW / 0.5P
FOB equipment
40 391 USD @ eff. 155.35
Exchange rate
44.9093 UAH/USD
Indicative turnkey
2 267 394 UAH
Warranty cycles
6 000 EFC
Resource cost
1.45 UAH/kWh
Resource share
70%
Current diesel price
For the backup scenario, diesel price is loaded from open market sources with manual fallback.
Manual diesel price is used until current data is loaded.
Retail price
79.30 UAH/l
Diesel energy
26.43 UAH/kWh
Source
Manual value
* Battery resource is the estimated cost of used BESS warranty cycles, not a separate annual payment and not accounting depreciation.
Technical savings breakdown, year 1
The model separates tariff arbitrage and diesel generation replacement
Tariff arbitrage: charge -> discharge
Annual SOC model: discharge 25.4 MWh, charge 45.9 MWh, EFC ~540/year
Backup: diesel generator replacement
Backup calculation after data loading
Battery resource reserve
Resource: 42.7 MWh/year x 1.45 UAH/kWh of used resource, SOH at year 15 ~70%
Service OPEX
5.0% of turnkey budget for service and support
Net savings, year 1
Calculating...
Ukrainian electricity market
For business, the model uses an all-in market price
Household
Reference only, not used in the business calculation
Residential
4.32
Business, all-in
DAM + transmission + distribution + supply + VAT
Commercial
11.23
BESS charge price
Average cheap DAM hours are loaded from API + delivery
Arbitrage
6.15
DAM base
Average monthly price with delivery components
Standard
11.23
BESS discharge price
Average expensive DAM hours are loaded from API + delivery
Peak
18.14
Household Fixed household tariff per 1 kWh. Shown only for comparison and not used in the business calculation.
Business, all-in Indicative full purchase price of 1 kWh for a business: DAM + transmission + selected DSO distribution + supplier margin + VAT. This is the base electricity price before BESS operation.
BESS charge price How much 1 kWh costs for charging during cheap DAM hours, including delivery and VAT. Battery charging cost in the arbitrage model.
DAM base Average all-in price of 1 kWh for the month. It is not a separate tariff, but a neutral level for comparing cheap and expensive hours.
BESS discharge price How much 1 kWh from the grid would cost during expensive DAM hours. When BESS discharges during these hours, this amount is counted as avoided electricity purchase.
Tariff spread
Key value for the arbitrage scenario
Charge price
6.15 UAH/kWh
Charge -> discharge spread
11.99 UAH/kWh
Discharge price
18.14 UAH/kWh
Spread is the difference between the discharge price and the charge price. It shows the savings potential before battery losses, resource reserve and OPEX. For the current capacity, usable volume is 79 kWh. An indicative charge -> discharge cycle gives 921 UAH gross result after losses, before resource reserve; after reserve ~807 UAH, and the annual SOC model gives 168 972 UAH.
* Battery resource is a calculated allowance for used warranty cycles; it is not a separate cash-flow payment or accounting depreciation. Cash flow also includes service OPEX and simple year-by-year SOH decline.
Cumulative economic effect
15-year model with break-even crossingNet annual savings
Gross savings minus battery resource reserve, OPEX and SOH degradationDiesel price history
Loading the full available diesel archiveDAM history, market component
Loading the full available DAM archive: excluding delivery, distribution and VATYear-by-year details
Annual effect, discounted annual amount, cumulative NPV and regular cumulative effect| Year | Gross | Resource reserve* | OPEX | Net | Disc. annual | NPV cum. | Cumulative effect | Status |
|---|
Methodology
What is included in the calculation
The model can use current data: hourly DAM prices from the Market Operator, Ukrenergo transmission tariff, distribution tariff of the selected DSO from NEURC and retail diesel price from open market sources. CAPEX is calculated through FOB price per kWh, P-rate and USD/UAH rate from the NBU API. If external sources are unavailable, the calculator falls back to manual assumptions for electricity, diesel price and exchange rate. Before a commercial proposal, supplier terms and the real consumption schedule must be checked.
Power: capacity x P-rate. Usable capacity: nominal x DoD 0.85 x round-trip efficiency 0.93.
The backup scenario is compared with the diesel alternative after diesel price is loaded.
Cash flow is calculated for 15 years: gross savings minus battery resource reserve, OPEX and SOH degradation.