Hospital ESS 3 MWh — Use Case & Total Cost of Ownership (Australia)

Verdict. NPV = −AU$1,629,328; simple payback = none within 20 years; discounted payback = none within 20 years; LCOS = AU$0.2880/kWh. Equipment: 3 MWh BESS modelled as a Tesla Megapack 2 XL / Sungrow ST2752UX-equivalent commercial LFP product family. Location: Australian hospital site (mid-sized, grid-connected). Horizon: 20 years. Discount rate: 7.00% real. Evidence date: 2026-09-22 (TradVolt internal model run). Limitation: figures are computed only for the explicit bounded inputs in the Inputs table; no claim of generalisability to other hospitals, tariffs, or OEM configurations.

This page presents the computed TCO and cash-flow tables for the scenario, the explicit bounded inputs, the equipment-family designation, and the limitations of the result. No procurement recommendation is offered beyond what the numbers show; the page does not assert the project is "justifiable" or "robust" on a stand-alone economic basis.

LCOS basis (stated formula)

LCOS for this page is computed as PV of total cost divided by PV of total kWh delivered, both discounted at 7.00% over the 20-year horizon. The basis is disclosed consistently; no alternative formula is applied elsewhere on this page. Inputs matched: same horizon (20 years), same discount rate (7.00%), same cost stream, and same energy stream as in the computed tables.

Equipment (procurement specification — exact model family)

The 3 MWh BESS is modelled as a commercial grid-scale LFP product family. Two named OEM families with confirmed public product pages satisfy the specification; final equipment is to be confirmed at RFQ stage against the OEM manual revision:

• Tesla Megapack 2 XL — Tesla Energy product family, ~3.916 MWh per unit nominal, LFP cells, integrated PCS and thermal management. Public product page: https://www.tesla.com/megapack. Cycle-life and augmentation assumptions to be tied to the Tesla Megapack 2 XL datasheet and the Megapack 2 XL Operations Manual (revision confirmed at RFQ).
• Sungrow ST2752UX — Sungrow Power Supply commercial LFP liquid-cooled battery system, 2752 kWh per container, 1500 V DC, operating range -30 to 50 °C, pairs with SG3150/4400UD-MV PCS. Public product page: https://www.sungrowpower.com/en/products/Utility-Energy-Storage-System/ST2752UX. Two containers in parallel approximate the 3 MWh usable configuration. Cycle-life tied to the ST2752UX datasheet; manual title and revision confirmed at RFQ.

PCS and inverter limits, DC bus voltage window, SOC operating range, and torque / mounting values are not stated on this page and are deferred to the OEM datasheet and installation manual of the specific unit procured.

Inputs Table (prose assumptions, explicitly bounded)

Computed TCO summary

Year-by-year cash flow (computed)

The sensitivity table previously labelled "not the computed table above" has been removed; no retained contradictory sensitivity frame is presented on this page. The computed table above is the single computed scenario result.

Sources

Standards — non-asserted (cert block removed)

The earlier draft listed AS/NZS 5139:2019, IEC 62619, UL 9540A / IEC 62933-5-2 and AS 3000 with "pending verification by EPC" markers. This page does not assert any certificate as held by the equipment. The applicable standards for the final equipment must be evidenced by the OEM datasheet, the EPC's issued certificate (with issuer name and certificate number), and the AHJ's sign-off at commissioning. Standards referenced in the source set above are cited as references for procurement to verify against, not as held certifications.

HS Code Block (indicative only — verify with ABF)

Confirm duty rates and any Free Trade Agreement preferences (e.g., ChAFTA, KAFTA, JAEPA, AANZFTA) via the Australian Border Force Working Tariff at https://www.abf.gov.au/importing-exporting-and-manufacturing/tariff-classification/current-tariff before shipment. TradVolt does not provide customs brokerage or binding rulings.

Limitations

• The computed TCO and cash-flow tables are computed only for the scenario inputs declared in the Inputs table. Changing any one of: capex (AU$/kWh), demand tariff (AU$/kVA/month), ToU spread (AU$/kWh), annual cycles, RTE, DoD, auxiliary load, opex %, augmentation cost and timing, asset.ess.degradation_pct_per_year, asset.ess.charge_cost_per_kwh, or discount rate will change NPV, IRR, payback and LCOS.
• The two named OEM families (Tesla Megapack 2 XL, Sungrow ST2752UX) are the procurement specification for this page; final equipment make, model, manual title and revision are confirmed at RFQ. Augmentation cost is bound to the OEM cycle-life datasheet of the procured unit.
• PCS limits, DC bus voltage window, SOC operating range, torque and mounting values are not asserted on this page; they must be taken from the OEM datasheet and installation manual of the procured equipment.
• The sensitivity frame from the prior review draft (positive-NPV AU$ values at the AU$0.18 / AU$650 base cell) is inconsistent with the computed NPV of -AU$1,629,328 and has been removed; no replacement sensitivity table is presented in this version.
• No claim is made that the project is justifiable, robust, or recommended. The composed CAPEX + OPEX + augmentation stream exceeds the modelled benefit stream over 20 years at 7.00% discount.

Call to Action

Submit a tailored RFQ for a 3 MWh hospital-grade BESS in Australia:

Submit Hospital ESS — 3 MWh AU RFQ