⚠ This is an example report with synthetic data. Run python3 octopus_battery_analysis.py to generate a real report from your account.

⚡ Battery Storage Analysis

Personalised recommendation based on your Agile Octopus usage data

A-EXAMPLEAccount
Agile OctopusTariff
365 daysData period
£1,240/yrEst. annual bill
Example ReportSynthetic data

📊 Your Usage Summary

3,800
Total kWh consumed
10.4
Daily avg kWh
£1,240
Total cost (data period)
19.2p
Avg rate (p/kWh)
62.0p
Peak rate (p/kWh)
118
Hours at negative rates
£1.94
Earned at negative rates
18
Hours at 0p (free)
-9.1p
Lowest rate seen

Monthly Consumption (kWh)

Monthly Cost (£)

⚡ Agile Rate Distribution — Usage by Rate Band

⚡ 82 kWh consumed at <0p 🟢 540 kWh consumed at 0–10p (cheap) 🟡 2,180 kWh consumed at 10–20p (medium) 🔴 998 kWh consumed at >20p (expensive)

🔋 Battery Recommendation

⚠ Marginal investment — savings partially offset costs; consider solar pairing to improve ROI.

Battery Comparison — Annual Savings & Cost of Ownership (15 years)

Battery Capacity Installed Cost Default strategy
charge≤10.0p / discharge≥20.0p		 Optimised strategy 🎯 Saving uplift 15yr Net Profit IRR
Year-1 savingPayback Best thresholds Year-1 saving Payback
GivEnergy 9.5 kWh ⭐ Best 9.5 kWh £5,500 £310 17.7 yrs ≤10p / ≥15p £388 14.2 yrs +£78/yr £+320 1.2%
Tesla Powerwall 3 (13.5 kWh) 13.5 kWh £9,500 £355 26.8 yrs ≤5p / ≥15p £432 22.0 yrs +£77/yr £-3,020 -8.1%
Alpha ESS Storion T10 (10 kWh) 10.0 kWh £5,200 £295 17.6 yrs ≤10p / ≥15p £372 14.0 yrs +£77/yr £+380 1.4%

☀️ Solar PV Analysis

Tip: Solar significantly improves battery ROI by shifting self-generated daytime energy to evening peak periods via the battery, reducing grid import at expensive Agile rates.

Solar + Battery — Combined Annual Savings (GivEnergy 9.5 kWh)

Solar Size Installed Cost Annual Generation Self-consumed Exported (SEG) Solar saving Battery saving Combined saving Combined payback
3 kWp £4,800 2,580 kWh 1,420 kWh 1,160 kWh £448 £388 £836 12.3 yrs
4 kWp ⭐ £6,400 3,440 kWh 1,760 kWh 1,680 kWh £557 £388 £945 11.9 yrs
6 kWp £9,600 5,160 kWh 2,100 kWh 3,060 kWh £663 £388 £1,051 17.1 yrs

⚠ Example report — synthetic data only. All figures are illustrative and based on a UK synthetic load profile (3,800 kWh/yr) with representative Agile rate patterns. Run python3 octopus_battery_analysis.py to generate a personalised report from your real Octopus account data.

Battery costs are UK market estimates (March 2026). Solar yield uses UK average irradiance data (south-facing, 30–40° pitch). SEG export rate assumed at 15p/kWh. All projections assume flat energy prices and usage — actual results will vary. This is not financial advice.