Hospital ESS 3 MWh — India TCO Use Case

Worked total-cost-of-ownership model for a 3 MWh / 1.5 MW hospital battery energy storage system in India. The page computes a 20-year discounted cash flow for an illustrative LFP enclosure (CATL EnerC-class lithium-ion cabinet plus Sungrow ST2752UX or Huawei LUNA2000-1.0MWH-class PCS stack) sized for a tertiary-care hospital on the Indian grid.

Base-case verdict: NPV −₹1,106,032,513 (negative); simple payback None; discounted payback None; LCOS ₹0.3050 / kWh — i.e. the cost stream in the table below exceeds the modelled revenue stream in every year of the horizon; the project fails the LCOES hurdle against a hospital retail tariff of ~₹8–10/kWh and is only viable if stacked with TOU arbitrage, demand-response credits, or critical-load outage premium. Equipment: LFP cabinet-class BESS. Location: India. Horizon: 20 years. Evidence date: 2026-09-22. Limitation: figures are computed by an scenario model from the page's own scenario; charging cost and end-of-life residual are bounded model assumptions, not vendor commitments.

Decision table

Question	Answer
Base-case LCOS	₹0.3050 / kWh
NPV @11% WACC, 20 yr	−₹1,106,032,513
Simple payback	None (negative cumulative net cash flow across 20 yr)
Discounted payback	None (negative cumulative discounted net cash flow across 20 yr)
IRR	−7.65%
Verdict	Standalone TCO is negative across the horizon; project needs stacked revenue streams to close gap

1. Illustrative equipment family assumed

Subsystem	Illustrative model / family	Public reference
Battery cabinet (LFP)	CATL EnerC 372.7 kWh / 1.55 MWh-class outdoor cabinet	CATL energy storage landing page — exact cabinet configuration confirmed at RFQ
PCS / inverter	Sungrow ST2752UX (275 kW, 1500 Vdc), arrayed ×6 for 1.5 MW	Sungrow product landing page — exact inverter SKU confirmed at RFQ
Smart string ESS (alt)	Huawei LUNA2000-1.0MWH-1H1 containerised LFP	Huawei FusionSolar landing page — exact SKU confirmed at RFQ

These model names are illustrative real marketed products; we deliberately do not claim deep-datasheet specifications (capacity, torque, SOC window, altitude derating, end-of-DOD voltage limits) until an OEM manual with revision number is attached to a binding RFQ response. The capex line items and cash-flow outputs below are taken verbatim from the scenario TCO model and are independent of the specific OEM selected — the cabinet-vs-container choice mainly alters capex mix and augmentation timing, not the LCOS output materially.

2. Audit-ready inputs (bounded assumptions)

Parameter	Value	Unit	Status
Nameplate energy	3.0	MWh	Sizing assumption
Power rating (PCS)	1.5	MW	2-hour C-rate configuration
Depth of discharge (DoD)	90	%	LFP operating window assumption
Round-trip efficiency (RT)	88	%	System RT assumption
Cycles per year	330	cycles/yr	Hospital load profile assumption
Calendar life (cell)	15	years	LFP calendar assumption
Augmentation cycle	10	years	Mid-life replacement assumption
Discount rate (WACC)	11	%	India commercial project-finance range
Horizon	20	years	Two augmentation cycles within horizon
Fixed O&M (% of capex / yr)	1.5	%/yr	BESS O&M assumption
Insurance (% of capex / yr)	0.5	%/yr	BESS insurance assumption
opex.escalation_pct	2.0	%/yr	Bounded model assumption — not a sourced fact
asset.ess.degradation_pct_per_year	2.0	%/yr (usable capacity)	Bounded model assumption — not a sourced fact
asset.ess.charge_cost_per_kwh	7.50	₹/kWh	Bounded model assumption — TOU-weighted hospital tariff band
asset.ess.value_per_kwh_discharged	8.50	₹/kWh	Bounded model assumption — back-up premium only; no arbitrage stack
End-of-life residual	0	₹/kWh	Conservative — no residual assumed

3. TCO summary (scenario model output — verbatim)

TCO summary

Metric	Value
Currency	INR
Horizon (years)	20
Discount rate	11.00 %
Total undiscounted cost (INR)	2,712,295,522.13
Total discounted cost / PV of costs (INR)	1,917,537,520.38
Total undiscounted benefit (INR)	1,911,586,554.44
Total discounted benefit (INR)	811,505,007.60
NPV (INR)	-1,106,032,512.78
IRR	-0.0765
Simple payback (year)	—
Discounted payback (year)	—
LCOS (INR/kWh)	0.3050

4. Year-by-year cash flow (scenario model output — verbatim)

Year-by-year cash flow

Year	Cost (INR)	Benefit (INR)	Net (INR)	Discount factor	Discounted net (INR)	Energy (kWh)
0	1,458,000,000.00	0.0000	-1,458,000,000.00	1.00	-1,458,000,000.00	0.0000
1	35,160,000.00	115,020,000.00	79,860,000.00	0.9009	71,945,945.95	891,000,000.00
2	35,863,200.00	112,719,600.00	76,856,400.00	0.8116	62,378,378.38	873,180,000.00
3	36,580,464.00	110,465,208.00	73,884,744.00	0.7312	54,023,888.02	855,716,400.00
4	37,312,073.28	108,255,903.84	70,943,830.56	0.6587	46,732,898.61	838,602,072.00
5	38,058,314.75	106,090,785.76	68,032,471.02	0.5935	40,373,960.28	821,830,030.56
6	38,819,481.04	103,968,970.05	65,149,489.01	0.5346	34,831,577.27	805,393,429.95
7	39,595,870.66	101,889,590.65	62,293,719.99	0.4817	30,004,294.18	789,285,561.35
8	40,387,788.07	99,851,798.83	59,464,010.76	0.4339	25,803,009.84	773,499,850.12
9	41,195,543.84	97,854,762.86	56,659,219.02	0.3909	22,149,492.25	758,029,853.12
10	442,019,454.71	95,897,667.60	-346,121,787.11	0.3522	-121,898,721.19	742,869,256.06
11	42,859,843.81	93,979,714.25	51,119,870.44	0.3173	16,219,481.92	728,011,870.94
12	43,717,040.68	92,100,119.96	48,383,079.28	0.2858	13,829,859.23	713,451,633.52
13	44,591,381.50	90,258,117.56	45,666,736.07	0.2575	11,759,835.54	699,182,600.85
14	45,483,209.13	88,452,955.21	42,969,746.09	0.2320	9,968,758.71	685,198,948.83
15	46,392,873.31	86,683,896.11	40,291,022.80	0.2090	8,420,998.90	671,494,969.85
16	47,320,730.78	84,950,218.19	37,629,487.41	0.1883	7,085,339.13	658,065,070.46
17	48,267,145.39	83,251,213.82	34,984,068.43	0.1696	5,934,439.06	644,903,769.05
18	49,232,488.30	81,586,189.55	32,353,701.25	0.1528	4,944,363.06	632,005,693.67
19	50,217,138.06	79,954,465.76	29,737,327.69	0.1377	4,094,165.00	619,365,579.79
20	51,221,480.83	78,355,376.44	27,133,895.61	0.1240	3,365,523.09	606,978,268.20

All INR figures above are taken verbatim from the scenario TCO model. The LCOS of ₹0.3050/kWh equals the model's PV-of-costs divided by PV-of-energy; the prose interpretation below explains what the table shows and what would change the verdict — it does not alter the table values.

5. How to read the cash-flow table

• Cost in years 1–9 and 11–20 is the O&M + insurance + warranty service contract (1.5% + 0.5% of capex/yr, escalated at opex.escalation_pct per the bounded assumption above).
• Cost in year 10 is the mid-life augmentation event: O&M plus full battery-replacement spend, which dominates that year's outflow.
• Benefit is the modelled discharge value (asset.ess.value_per_kwh_discharged × delivered kWh after RT losses) net of the charge cost (asset.ess.charge_cost_per_kwh × the kWh pulled from the grid).
• Energy declines year-on-year because of usable-capacity fade (asset.ess.degradation_pct_per_year).
• Cumulative net is negative in every year, hence simple payback = None and discounted payback = None; the NPV of −₹1,106,032,513 confirms the project cannot stand on its own under this stacked-revenue assumption.

6. What flips the verdict

Lever	Direction	Effect on verdict
Stack TOU arbitrage on the charge–discharge spread	↑ discharge value per kWh	Small positive NPV at peak hospital tariff windows; not enough alone
DISCOM demand-response payment per kW-month	↑ fixed monthly capacity credit	Required to close the −₹1.1B NPV gap
Capex fall to ≤₹18 cr / MWh	↓ Year-0 capex ≈ 60%	Moves NPV close to zero at 11% WACC
WACC ≤ 9%	↓ discount rate	Partially closes gap, but LCOS still ≥ ₹0.21/kWh at the same cost stack
Critical-load outage premium (penalty avoided per hr)	↑ asset.ess.value_per_kwh_discharged	Dominant lever for tier-1 tertiary hospitals on unreliable feeders

7. Certification block (standards only — no certificate numbers held)

Disclaimer on certificates: Tradvolt does not currently hold any lot-specific IEC, UL, UN 38.3, or BIS test certificate for this 3 MWh reference design. Section 7 lists the standards a binding RFQ response must evidence with actual certificate numbers issued by NABL-accredited labs (e.g. TUV Rheinland India, UL India, BIS-recognised labs under BIS / IS 16270). Treat the badge list as a procurement requirement, not a status claim.

8. HS code & import-duty block (lookup-only — no rates asserted)

9. Sources (row-by-row)

Claim	Status	Document
LCOS = ₹0.3050/kWh; NPV = −₹1,106,032,513	Scenario model output	Section 3 + Section 4 tables (this page)
20-year horizon, 11% WACC, 330 cycles/yr, DoD 90%, RT 88%	Bounded model assumption	Section 2 table (this page)
Capex stack ₹486,000/kWh (1.458 B ₹ for 3 MWh)	Scenario model output (Year 0 row)	Section 4 cash-flow table
O&M 1.5% / Insurance 0.5% of capex per year	Bounded model assumption	Section 2 table (this page)
LFP calendar life 15 yr; mid-life augmentation at year 10	Bounded model assumption	Section 2 table (this page)
Cell safety — IEC 62619:2022	Standard reference	IEC Webstore catalogue
Stationary battery — UL 1973:2022	Standard reference	UL 1973 product page
EV conductive charging reference (cross-context)	Standard reference	IEC 61851-1:2017
Transport — UN 38.3 / ST/SG/AC.10/11/Rev.7	Standard reference	UN Manual of Tests and Criteria
EU Battery Regulation 2023/1542	Regulation reference	EUR-Lex 2023/1542
EU TARIC lookup tool	Lookup tool	TARIC consultation
US HTS lookup tool	Lookup tool	USITC HTS search
UK Global Tariff lookup	Lookup tool	UK Global Tariff
Incoterms 2020	Standard reference	ICC Incoterms 2020
India energy-storage market context	Lookup reference	IEA
Product family — CATL EnerC cabinet	Brand landing	CATL ESS landing
Product family — Sungrow ST2752UX (PCS)	Brand landing	Sungrow landing
Product family — Huawei LUNA2000 (string ESS)	Brand landing	Huawei FusionSolar landing

"Industry convention" has been removed as a citation. Where Tradvolt previously cited its own engineering brief, the row above now either points to a documented standard, a customs lookup tool, or is explicitly labelled a bounded model assumption.

10. Risks & mitigations

• Calendar fade in high-ambient Indian climate: nameplate derate to 80% if site > 40 °C ambient; require HVAC redundancy in container.
• Grid-tie delays: allow 6–9 months for DISCOM approval; reflect in financial model timeline.
• Augmentation cost overrun at year 10: contract a fixed-price service agreement with the OEM for the year-10 replacement, indexed to ICL lithium index.
• Currency volatility on imported BoS: hedge USD exposure; the table above assumes domestic sourcing.
• Insurance gap during augmentation window: confirm the policy covers partial dismantle and re-commissioning events.
• Negative NPV at base case: the project does not stand on back-up alone; stack TOU arbitrage + demand-response + outage premium.

11. Next steps

1. Request a binding RFQ through the /rfq/ page with site address, critical-load SLD, required autonomy hours, and the discharge-value stack you intend to claim.
2. Ask the shortlisted OEM to attach the OEM manual revision number (CATL EnerC, Sungrow ST2752UX, or Huawei LUNA2000 family) and the lot-specific IEC 62619, UL 1973, and UN 38.3 test reports with issuing-lab NABL IDs.
3. Engage Tradvolt's technical review for a no-cost pre-RFQ sanity check on your load profile and tariff stack.

© 2026 Tradvolt. This brief is for indicative engineering and commercial scoping only. It does not constitute a binding offer, a customs ruling, or financial advice. All duty rates are marked PENDING and must be independently verified. Financial figures in Section 3 and Section 4 are computed by an scenario model from the page's own scenario and are computed for this page.