Verdict (computed TradVolt model, evidence date 2026-09-22): Project is value-accretive. NPV = £986,004 at 8.00% discount over 10 years; simple payback = 0.804 yr; discounted payback = 0.868 yr; TCO per km EV = £0.401 vs ICE = £1.170 (savings £0.769/km, £3,076,200 over horizon). Equipment: Sungrow 22 kW AC EV charger (three-phase, OCPP 1.6J, IEC 61851-1 Mode 3); Location: UK mine site; Horizon: 10 years; Discount rate: 8.00%. Limitation: B2B planning template only — not engineering advice; final CapEx line, DNO charge schedule, OEM torque values and HSE mining-days calendar to be confirmed at RFQ stage.
| Metric | Value |
|---|---|
| NPV (GBP) | 986,004.08 |
| IRR | 1.24 |
| Simple payback (year) | 0.8037 |
| Discounted payback (year) | 0.8680 |
| TCO per km — EV (GBP/km) | 0.4009 |
| TCO per km — ICE (GBP/km) | 1.17 |
| Savings per km (GBP/km) | 0.7691 |
| Savings over horizon (GBP) | 3,076,200.00 |
Disclaimer: This page is a B2B planning template, not engineering advice. All published rates are inputs the buyer must reconfirm with HMRC, the local DNO, and a customs broker before commitment.
This use-case models a 16-port mine-site EVSE hub built around Sungrow's 22 kW three-phase AC EV charger family, IEC 61851-1 Mode 3, Case C, OCPP 1.6J back-office. Each port delivers 22 kW AC. Hub-level protection, RCD, MID metering and back-office integration follow the charger OEM Installation & Operation Manual supplied with the unit; the buyer must verify exact model designation, manual edition and revision at RFQ stage. The Sungrow AC EV charger family is presented via the Sungrow string-inverter and EV-charger product pages; the specific datasheet PDF for the unit shipped is confirmed at RFQ.
| Input | Value | Unit | Source |
|---|---|---|---|
| Number of ports | 16 | ports | Site specification (TradVolt RFQ) |
| Power per port | 22 | kW AC | Sungrow 22 kW AC EV charger datasheet (PDF confirmed at RFQ; family page: Sungrow string inverter / product range) |
| Charger standard | IEC 61851-1 Mode 3, Case C | — | IEC 61851-1:2017, clause 6.2 [IEC 61851-1:2017] |
| Back-office protocol | OCPP 1.6J | — | Open Charge Alliance, OCPP 1.6 JSON edition [Open Charge Alliance] |
| Site peak demand | 352 | kW | Calc: 16 × 22 = 352 kW |
| Working days per year | 258 | days | Bounded model assumption (UK surface mineral operations calendar) |
| Daily hours | 12 | h/day | Bounded model assumption (two-shift duty) |
| UK grid price (commercial) | 0.32 | £/kWh | UK Ofgem energy price cap hub, current baseline [Ofgem energy price cap] — figure to re-check at RFQ |
| CapEx per port (turnkey) | 3,800 | £ | Bounded model assumption (vendor quote line, TradVolt RFQ 2026-01) — replace with PO once issued |
| Civil works (non-recurring) | 48,000 | £ | Bounded model assumption (UK surface mine enabling works) |
| DNO upgrade (if required) | 25,000 | £ | Bounded model assumption (UK DNO EHV demand connection schedule; final figure per DNO quote) |
| Annual OpEx per port | 220 | £/yr | Bounded model assumption (maintenance + connectivity) |
| OpEx escalation | 2.00 | %/yr | Bounded model assumption (consumer-services CPI proxy) |
| Grant offset (OZEV) | — | £ | Excluded — OZEV EV chargepoint grants do not cover mine sites [OZEV installer guidance] |
| Discount rate | 8.00 | % | Bounded model assumption (TradVolt WACC proxy) |
| Analysis horizon | 10 | years | Bounded model assumption |
| Residual value (year 10) | 10,000 | £ | Bounded model assumption |
| EV fleet size | 10 | vehicles | Bounded model assumption |
| EV km/year | 40,000 | km/yr per vehicle | Bounded model assumption (heavy-duty open-pit hauler cycle) |
| EV kWh/km | 1.00 | kWh/km | Bounded model assumption (BEV rigid dump truck) |
| Diesel L/km | 0.45 | L/km | Bounded model assumption (comparable diesel rigid) |
| Diesel price (£/L) | 1.50 | £/L | Bounded model assumption (UK pump + red-diesel class) |
| Maint EV (£/km) | 0.05 | £/km | Bounded model assumption |
| Maint ICE (£/km) | 0.12 | £/km | Bounded model assumption |
| ICE CapEx per vehicle | 150,000 | £ | Bounded model assumption |
| Metric | Value |
|---|---|
| Currency | GBP |
| Horizon (years) | 10 |
| Discount rate | 8.00 % |
| Total undiscounted cost (GBP) | 162,343.02 |
| Total discounted cost / PV of costs (GBP) | 154,709.76 |
| Total undiscounted benefit (GBP) | 1,700,000.00 |
| Total discounted benefit (GBP) | 1,140,713.84 |
| NPV (GBP) | 986,004.08 |
| IRR | 1.24 |
| Simple payback (year) | 0.8037 |
| Discounted payback (year) | 0.8680 |
| TCO per km — EV (GBP/km) | 0.4009 |
| TCO per km — ICE (GBP/km) | 1.17 |
| Savings per km (GBP/km) | 0.7691 |
| Savings over horizon (GBP) | 3,076,200.00 |
| Year | Cost (GBP) | Benefit (GBP) | Net (GBP) | Discount factor | Discounted net (GBP) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 133,800.00 | 0.0000 | -133,800.00 | 1.00 | -133,800.00 | 0.0000 |
| 1 | 3,520.00 | 170,000.00 | 166,480.00 | 0.9259 | 154,148.15 | 0.0000 |
| 2 | 3,590.40 | 170,000.00 | 166,409.60 | 0.8573 | 142,669.41 | 0.0000 |
| 3 | 3,662.21 | 170,000.00 | 166,337.79 | 0.7938 | 132,044.30 | 0.0000 |
| 4 | 3,735.45 | 170,000.00 | 166,264.55 | 0.7350 | 122,209.41 | 0.0000 |
| 5 | 3,810.16 | 170,000.00 | 166,189.84 | 0.6806 | 113,106.01 | 0.0000 |
| 6 | 3,886.36 | 170,000.00 | 166,113.64 | 0.6302 | 104,679.77 | 0.0000 |
| 7 | 3,964.09 | 170,000.00 | 166,035.91 | 0.5835 | 96,880.36 | 0.0000 |
| 8 | 4,043.37 | 170,000.00 | 165,956.63 | 0.5403 | 89,661.20 | 0.0000 |
| 9 | 4,124.24 | 170,000.00 | 165,875.76 | 0.5002 | 82,979.18 | 0.0000 |
| 10 | -5,793.27 | 170,000.00 | 175,793.27 | 0.4632 | 81,426.30 | 0.0000 |
The COMPUTED TABLES in §3 and §4 are the computed outputs of the scenario model. All financial figures in this page are taken verbatim from those tables; no methodology section, worked derivation or closed-form check is reproduced here. The benefit stream is defined consistently across the page as the annual diesel-displacement value delivered by the 16-port hub; the total-km denominator used for the per-km figures is 10 vehicles × 40,000 km/yr × 10 years = 4,000,000 km. ICE vehicle CapEx is treated as an out-of-scope comparator (not charged to the EVSE project), and the project's own costs and benefits are those listed in §3 and §4. The previous draft carried a sensitivity table showing NPV invariant to energy price and utilisation, which contradicts the underlying inputs; that table has been removed. Per RFQ stage, the buyer should request a refreshed sensitivity on the £/kWh and utilisation levers against the inputs in §2.
The Sungrow charger family datasheet (PDF confirmed at RFQ) is the controlling document for per-port current, terminal torque and enclosure rating; the buyer must read the manual revision supplied with each unit before installation. Vehicle-side control signalling per IEC 61851-1:2017, clause 6.2 (Mode 3, Case C) [IEC 61851-1:2017]. Plugs / sockets per IEC 62196-3 (catalogue query at IEC Webstore: [IEC 62196-3 catalogue query]). This page does not substitute for the OEM document.
| HS code | Description | UK duty |
|---|---|---|
| 8537 10 98 | Electric vehicle charging stations — boards/panels | PENDING — verify with [UK Global Tariff] |
| 8504 40 90 | Static converters (if DC modules included) | PENDING — verify with [UK Global Tariff] |
Lookup instructions:
For lithium-ion auxiliary batteries referenced in any mobile sub-assemblies, classify against UN Manual of Tests and Criteria, ST/SG/AC.10/11/Rev.7 (UN 38.3) [UN Manual of Tests and Criteria] and ship per [IATA DGR].
Duty rates are marked PENDING and must not be asserted as fact. Final liability rests with the importer of record.
Request a formal quote for the 16-port mine-site EVSE hub: Submit RFQ — TradVolt Mine-Site EVSE 16-Port (UK)