Sentinel EMS™

Sentinel Commercial Savings Calculator

Upload the proposal PDF to auto-populate, and the site's half-hourly data for the most accurate result. All fields can be adjusted at any time.

Auto-populate from proposal optional, all fields editable manually

📄

Drop a solar proposal PDF here or click to browse

Key figures will be extracted automatically

Customer details

Business name

Site address (line 1)

Half-hourly usage data preferred; CSV from the supplier or DNO

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Drop the half-hourly data CSV here

Read in your browser and never stored. Without it, usage follows the standard business profile.

Order type

Solar + BatteryPV, storage and Sentinel EMSBattery onlyStorage and Sentinel EMS, no solar

System specification

Solar PV size

kWp

Battery capacity

kWh

Inverter power rating

Annual generation

kWh/yr

Annual consumption

kWh/yr

Total system cost (ex-VAT)

Solar & battery figures enter directly from the proposal

Annual bill savings (yr 1)

Payback period

years

25-year cumulative return

Rate of return on investment

Site tariff

Flat rateOne unit rate all dayDay / nightCheaper overnight rate

Tariff rates (ex-VAT)

Unit rate

p/kWh

Export rate (flat)

p/kWh

Network charges (DUoS) 2026/27 DNO rates

DNO area

Grid connection

Included in the unit rateTypical for small sites without itemised DUoS on the billItemised on the billRed / amber / green charged on top of the unit rate

DUoS bands (for reference; already in the unit rate)

Red 24.204p · Mon-Fri 17:00-19:00

Amber 1.93p · Mon-Fri 07:30-17:00, 19:00-21:30; Sat-Sun 16:30-19:30

Green 0.211p · All other times

Site limits leave blank for no limit

Import capacity

kVA

Export limit (G99)

Energy price inflation assumption

Annual energy price inflation rate7%

3%15%

Scenarios:

Still needed before a report can be produced: Solar PV size, Battery capacity, Inverter power rating, Annual generation, Annual consumption (or a half-hourly file), Total system cost, Annual bill savings (yr 1), Payback period, 25-year cumulative return.