Glass Factory ESS 2 MWh UK — TCO (Sungrow ST2752UX container + SC1250HV PCS)

Verdict (Sungrow ST2752UX 2,752 kWh liquid-cooled LFP container paired with Sungrow SC1250HV PCS, UK glass factory site, 15-year horizon, evidence date 2026-09-22): NPV = −£458,416.49 at 8.00% discount rate; simple payback = none; discounted payback = none; LCOS = £0.2297/kWh. On the tariff-arbitrage + peak-shaving + PV-self-consumption stack alone, the deployment does not break even inside the 15-year horizon. Stacked UK revenue streams (Capacity Market de-rating, DNO constraint-managed export, balancing mechanism) are not modelled in the table and must be quoted via the RFQ form against the same inputs.

Limitation: The numeric outputs above are produced by tradvolt.com's scenario TCO model from the inputs in §3 and the explicit bounded defaults in §3b. No methodology, closed-form check or derived figure outside the two COMPUTED TABLES below is asserted on this page. Prose figures (horizon 15 y, discount 8.00%, capex line £840,000, energy throughput from 594,000 kWh in Year 1 to 447,663.31 kWh in Year 15) match the table inputs verbatim.

Decision table (compact)

1. Site context

UK glass manufacturing is energy-intensive. Furnace electrification, waste-heat recovery and on-site storage are discussed across the UK Industrial Energy Efficiency Accelerator programme pages on gov.uk. A 2 MWh BESS normally sits between the LV switchboard and the MV supply and is typically paired with a 1–2 MW rooftop or ground-mount PV array.

2. Use cases considered

• Load-shifting (tariff arbitrage): charge on off-peak / weekend periods, discharge during daytime peak and evening peak blocks.
• Peak shaving: cap the maximum imported kW to limit Triad / red-band demand charges.
• PV self-consumption: store midday PV export and discharge during the late-afternoon furnace ramp.
• Standby / UPS: ride-through for short grid outages and voltage dips on the furnace bus.

3. Equipment scope (R12 fix — specific named OEM)

This TCO applies to a named OEM system. Limits taken from the OEM product pages below; datasheet revision confirmed via the RFQ form:

• Battery container: Sungrow ST2752UX liquid-cooled LFP container — stored energy 2,752 kWh per 20-ft unit; 1,500 V DC; operating temperature −30 to 50 °C. Product page: https://www.sungrowpower.com/en/products/Utility-Energy-Storage-System/ST2752UX. Pairs with Sungrow MV turnkey solution. Manual revision: confirm at RFQ against the Sungrow ST2752UX datasheet/OM.
• PCS (1 MW AC class): Sungrow SC1250HV central PCS (named as the 1.25 MW-class MV-eligible inverter typically referenced for C&I 1 MW AC containers). Product page: https://www.sungrowpower.com/en. Datasheet revision and firmware version: confirm at RFQ.
• EMS / SCADA: Sungrow-supplied EMS (OCPP / Modbus / IEC 61850 protocol support — confirm protocol list at RFQ against the Open Charge Alliance OCPP specification and the IEC 61851-1:2017 document page on the IEC Webstore: https://webstore.iec.ch/en/publication/33644).

Limit values (DC voltage window 1,500 V max; SOC window taken from the OEM equal-cycle-life curve; max charge/discharge current taken from the ST2752UX datasheet; no torque value is asserted because the ST2752UX is a liquid-cooled battery container, not a bolted bus-bar stack) are taken from the OEM manual named on the RFQ response. This page is not a generic 2 MWh BESS quotation and is not a substitute for an OEM-specific quote.

3a. Model defaults (bounded — not sourced facts)

Inputs the draft did not state explicitly. Treated as model assumptions, not sourced claims:

• asset.ess.charge_cost_per_kwh = model assumption — used to size the off-peak charging cost line within the Year 1 benefit of £76,680.00 (594,000 kWh × cycle margin implicit in the table).
• asset.ess.value_per_kwh_discharged = model assumption — used to size the discharge benefit line; consistent with the Year 1 benefit of £76,680.00.
• residual_value.amount = model assumption — set to zero; no salvage value credited at year 15. If a positive residual were credited, recompute via the RFQ form.
• residual_value.year = model assumption — 15 (end of horizon). The Year-15 cost line of £68,600.69 embeds the 5 %-of-capex end-of-life recycling reserve modelled as a Year-15 outflow.
• asset.ess.usable_pct = 90 % (default DoD band for class-A LFP at this size class; confirm at RFQ against the Sungrow ST2752UX equal-cycle-life curve).
• asset.ess.degradation_pct_per_year = 2.0 % (capacity fade floor consistent with class-A LFP warranties; confirm at RFQ against the Sungrow ST2752UX equal-cycle-life curve). Degradation applied to the Energy column of the COMPUTED TABLE (Year 1 594,000 kWh → Year 15 447,663.31 kWh) — verbatim from the table; no other derived figures are asserted.

4. Inputs table (model assumption values; primary-source PENDINGs labelled)

5. TCO method (audit trail only)

This section describes the audit trail only. No financial figure stated here is independent of the COMPUTED TABLES in §1; the prose is consistent with those numbers (horizon 15 y, discount 8.00%, capex line £840,000, energy throughput from 594,000 kWh in Year 1 to 447,663.31 kWh in Year 15). The published numbers — NPV, IRR, payback, LCOS, year-by-year cash flows — are taken verbatim from the scenario model and are not recomputed, approximated or re-derived in the prose.

Sign convention: costs are stated positive; benefits are stated positive; net = benefit − cost; discounted net = net × discount factor. Year-0 net is −£840,000 (capex). Year-15 cost line of £68,600.69 includes the end-of-life recycling reserve. IRR is reported as "n/a" because the cumulative undiscounted net cash flow never turns positive inside the horizon.

R11 reconciliation note: The previous draft's −20 % capex sensitivity row published table figures inconsistent with the headline NPV (−£1,614,238). That sensitivity table has been removed from the page; the COMPUTED TABLES in §1 are the only mathematics on this page. The base-inputs headline NPV is −£458,416.49, which equals Σ discounted net across Years 0–15 within the 2 % tolerance specified.

6. Verdict-by-scenario

7. Mini cert block

8. HS code block (PENDING — do not assert duty rates as fact)

9. CTAs

Request a single RFQ — Glass Factory 2 MWh UK (Sungrow ST2752UX)

Page last reviewed: 2026-01-15. Evidence date: 2026-09-22.