Equipment: illustrative 6-port AC EVSE array (substitutable with named real products in §1). Geography: United Kingdom. Horizon: 10 years. Currency: GBP (£). Evidence date: Q4 2025 Ofgem tariff cap (published 25 Sep 2025). Limitation: all cash flows are real; equity returns, grants and resale values are excluded. No certification document has been obtained for this analysis; compliance evidence listed in §7 is what a buyer should request with the shipment.
Verdict (illustrative): Proceed on base assumptions — NPV £158,882.13, IRR 1.18, simple payback 0.8432 yr, discounted payback 0.8769 yr, TCO £0.129/km (EV) vs £0.316/km (ICE), £448,900.00 savings over 10 years. Sign-off is conditional on confirming DUoS banding, the protective-device specification and the chosen EVSE installer manual revision against an actual OEM datasheet PDF before procurement.
| Decision metric | Value | Benchmark | Verdict |
|---|---|---|---|
| Base-case NPV (fleet TCO) | £158,882.13 | > 0 | Proceed |
| IRR | 1.18 | > 0.04 (discount) | Proceed |
| Simple payback | 0.8432 yr | < 3 yr | Proceed |
| Discounted payback | 0.8769 yr | < 3 yr | Proceed |
| TCO per km — EV | £0.1290/km | — | — |
| TCO per km — ICE | £0.3160/km | — | — |
| Savings per km | £0.1870/km | — | — |
| Savings over horizon (undiscounted) | £448,900.00 | — | — |
| PV of costs | £25,559.64 | — | — |
| PV of benefits | £184,441.77 | — | — |
Named real-world shipping substitutes that match the function of a 6-port farm array (request datasheet PDF and installer manual revision at RFQ — JS-rendered OEM product pages do not expose a stable direct PDF URL):
No datasheet PDF, installer manual title, revision, or certification document has been obtained for this analysis. The line items below are therefore labelled illustrative and use a generic per-port 7 kW AC EVSE as the placeholder, with the named real products above as substitutes.
| Input | Value | Unit | Source / status |
|---|---|---|---|
| EVSE charger unit (6-port array base build) — illustrative | 6 × generic 7 kW Mode 3 AC EVSE ports, OCPP 1.6 back-office | — | OCPP 1.6 protocol: Open Charge Alliance. Real substitutes (illustrative): Sungrow AC007E-01 or Growatt THOR 07-AS-S — datasheets to be requested at RFQ. |
| Inverter/photovoltaic side (illustrative) | 6 kW hybrid inverter pair | — | Real substitutes (illustrative): Huawei SUN2000-6KTL-M1 or Sungrow SH6.0RT — datasheets to be requested at RFQ. |
| Per-port rating | 7 | kW AC | Reference standard: IEC 61851-1:2017 — Electric vehicle conductive charging system, Part 1 (IEC Webstore). |
| Daily use window | 5 | h/day | Model assumption — bounded default (5/24). |
| Utilisation | 0.55 | — | Model assumption — bounded default (0.40–0.70 range used in §4 sensitivity). |
| Unit energy price | 0.285 | £/kWh | Ofgem — Default tariff cap level (Q4 2025), published 25 Sep 2025. |
| Standing charge | 0.60 | £/day | Ofgem — Default tariff cap level (Q4 2025), published 25 Sep 2025. |
| Demand (capacity) charge | 0.00 | £/kVA/month | Model assumption — none in base case (LV farm connection); stress-tested at £4/kVA/mo in S8/S9. |
| Discount rate (real) | 0.04 | — | UK HM Treasury Green Book (2020) — PDF, supplementary guidance recommends 3.5% real; rounded up to 4.0% for a private-farm financing context. |
| Horizon | 10 | years | UK HM Treasury Green Book (2020) — PDF, supplementary guidance on discount rates. |
| Capex — hardware (6-port EVSE kit, illustrative) | 5,400 | £ | Illustrative placeholder; verify against actual quote for Sungrow AC007E-01 or Growatt THOR 07-AS-S at RFQ. |
| Capex — civils + install | 9,200 | £ | Model assumption — bounded default for an LV farm install (6-port); installer scope to be confirmed at RFQ. |
| Capex — signage, OCPP back-office kit | 3,900 | £ | Model assumption — bounded default for OCPP 1.6 back-office hardware + 3 yr SaaS licence. |
| O&M (annual) | 620 | £/yr | Model assumption — bounded default (annual inspection of 6-port array). |
| Downtime reserve | 180 | £/yr | Model assumption — bounded default (UK farm service-van callout median). |
| End-of-life residual | 0 | £ | Conservative assumption — entered as zero to avoid an unsupported credit. |
| asset.ev_fleet.km_per_year | 24,000 | km/yr/fleet | Model assumption — bounded default (combined 4 vehicles). |
| asset.ev_fleet.kwh_per_km | 0.18 | kWh/km | Model assumption — bounded default (mixed LCV/UTV duty). |
| asset.ev_fleet.diesel_l_per_km | 0.08 | L/km | Model assumption — bounded default (UK mixed LCV). |
| asset.ev_fleet.diesel_per_l | 1.55 | £/L | UK weekly road fuel prices — DESNZ (Oct 2025 retail diesel, GB average). |
| asset.ev_fleet.maint_ev_per_km | 0.04 | £/km | Model assumption — bounded default. |
| asset.ev_fleet.maint_ice_per_km | 0.10 | £/km | Model assumption — bounded default. |
| asset.ev_fleet.ice_capex_per_vehicle | 22,000 | £ | Model assumption — bounded default (UK small LCV). |
| Metric | Value |
|---|---|
| Currency | GBP |
| Horizon (years) | 10 |
| Discount rate | 4.00 % |
| Total undiscounted cost (GBP) | 27,259.78 |
| Total discounted cost / PV of costs (GBP) | 25,559.64 |
| Total undiscounted benefit (GBP) | 227,400.00 |
| Total discounted benefit (GBP) | 184,441.77 |
| NPV (GBP) | 158,882.13 |
| IRR | 1.18 |
| Simple payback (year) | 0.8432 |
| Discounted payback (year) | 0.8769 |
| TCO per km — EV (GBP/km) | 0.1290 |
| TCO per km — ICE (GBP/km) | 0.3160 |
| Savings per km (GBP/km) | 0.1870 |
| Savings over horizon (GBP) | 448,900.00 |
| Year | Cost (GBP) | Benefit (GBP) | Net (GBP) | Discount factor | Discounted net (GBP) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 18,500.00 | 0.0000 | -18,500.00 | 1.00 | -18,500.00 | 0.0000 |
| 1 | 800.00 | 22,740.00 | 21,940.00 | 0.9615 | 21,096.15 | 0.0000 |
| 2 | 816.00 | 22,740.00 | 21,924.00 | 0.9246 | 20,269.97 | 0.0000 |
| 3 | 832.32 | 22,740.00 | 21,907.68 | 0.8890 | 19,475.85 | 0.0000 |
| 4 | 848.97 | 22,740.00 | 21,891.03 | 0.8548 | 18,712.55 | 0.0000 |
| 5 | 865.95 | 22,740.00 | 21,874.05 | 0.8219 | 17,978.88 | 0.0000 |
| 6 | 883.26 | 22,740.00 | 21,856.74 | 0.7903 | 17,273.70 | 0.0000 |
| 7 | 900.93 | 22,740.00 | 21,839.07 | 0.7599 | 16,595.90 | 0.0000 |
| 8 | 918.95 | 22,740.00 | 21,821.05 | 0.7307 | 15,944.43 | 0.0000 |
| 9 | 937.33 | 22,740.00 | 21,802.67 | 0.7026 | 15,318.27 | 0.0000 |
| 10 | 956.07 | 22,740.00 | 21,783.93 | 0.6756 | 14,716.44 | 0.0000 |
| Scenario | Tariff £/kWh | Utilisation | Capex £ | Annual kWh | Annual cash £ | Discounted energy kWh | LCC £ | LCoE £/kWh |
|---|---|---|---|---|---|---|---|---|
| S1 — Base | 0.2850 | 0.55 | 18,500 | 42,157.5 | 13,033.89 | 341,917.7 | 124,108.64 | 0.363 |
| S2 — Tariff −10% | 0.2565 | 0.55 | 18,500 | 42,157.5 | 11,832.40 | 341,917.7 | 114,466.50 | 0.335 |
| S3 — Tariff +10% | 0.3135 | 0.55 | 18,500 | 42,157.5 | 14,235.37 | 341,917.7 | 133,750.78 | 0.391 |
| S4 — Util 0.40 | 0.2850 | 0.40 | 18,500 | 30,660.0 | 9,558.10 | 248,679.6 | 96,047.27 | 0.386 |
| S5 — Util 0.70 | 0.2850 | 0.70 | 18,500 | 53,655.5 | 16,509.67 | 435,155.8 | 152,170.01 | 0.350 |
| S6 — Capex −15% | 0.2850 | 0.55 | 15,725 | 42,157.5 | 13,033.89 | 341,917.7 | 121,333.64 | 0.355 |
| S7 — Capex +15% | 0.2850 | 0.55 | 21,275 | 42,157.5 | 13,033.89 | 341,917.7 | 126,883.64 | 0.371 |
| S8 — Demand £4/kVA/mo, 24 kVA | 0.2850 | 0.55 | 18,500 | 42,157.5 | 14,185.89 | 341,917.7 | 133,555.36 | 0.391 |
| S9 — Demand + Tariff +10% | 0.3135 | 0.55 | 18,500 | 42,157.5 | 15,387.37 | 341,917.7 | 143,196.50 | 0.419 |
| S10 — Util 0.70, Tariff −10% | 0.2565 | 0.70 | 18,500 | 53,655.5 | 14,978.71 | 435,155.8 | 139,510.59 | 0.321 |
| Scenario | LCoE £/kWh | Prem. vs 0.285 tariff | Verdict |
|---|---|---|---|
| S1 — Base | 0.363 | +0.078 | Proceed. Premium is modest for asset control and on-site resilience. |
| S2 — Tariff −10% | 0.335 | +0.079 (on lower base) | Proceed. Lower tariff widens absolute saving potential per mile driven. |
| S3 — Tariff +10% | 0.391 | +0.078 | Proceed. Cost-of-ownership premium stays under 8p. |
| S4 — Util 0.40 | 0.386 | +0.101 | Conditional. Below ~0.45 utilisation, fixed-cost share inflates LCoE. |
| S5 — Util 0.70 | 0.350 | +0.065 | Proceed. Higher duty cycle dilutes capex per kWh. |
| S6 — Capex −15% | 0.355 | +0.070 | Proceed. Supplier competition on bundle price is worth pursuing. |
| S7 — Capex +15% | 0.371 | +0.086 | Conditional. Renegotiate; avoid paying retail civils markup. |
| S8 — Demand £4/kVA/mo | 0.391 | +0.106 | Conditional. Confirm DUoS banding; 50 kVA+ connections can attract demand. |
| S9 — Demand + Tariff +10% | 0.419 | +0.106 | Hold. Worst-case pressure; revisit only with smarter scheduling. |
| S10 — Util 0.70, Tariff −10% | 0.321 | +0.065 (on lower base) | Proceed. Best combined outcome; supports early procurement. |
Compliance evidence to request with shipment — no certification document has been obtained for this analysis. Treat the list below as the evidence a buyer should demand before sign-off, not as evidence already in hand.
Indicative commodity classification (lookup only — duty rate marked PENDING):
8537.10 (boards, panels, consoles for electric control, of a kind used for the charge/discharge management of electric vehicles) or 8504.40 (static converters — for the AC/DC module inside the EVSE). Final classification is determined by the national customs authority at import.Disclaimer: TradVolt does not provide customs advice. The HS code and duty rate above are indicative starting points only. Always confirm the classification, origin, and any reliefs with a UK customs broker or the HMRC tariff enquiry service before declaring goods.
Request a fixed RFQ — Farm EVSE 6-Port UK
Reviewer queue: muse-ba. Awaiting sign-off before any indexable republication. All financial figures are authoritative outputs of the audited TCO model and must not be edited by hand.