Which specific OEM and model is modelled on this page?

Sungrow PowerTitan ST5568WH (5.568 MWh per 20 ft container, LFP). The 2 MWh energy throughput used here is a partial-fill operating envelope against the OEM's full platform; refer to the Sungrow PowerTitan ST5568WH product manual Rev. 1.2 for limits (DC voltage window, SOC, torque values).

Import 2 MWh LFP Container BESS (Sungrow ST5568WH) to New Zealand — Utility Mini-Grid TCO

Q: What is the computed 25-year NPV for a 2 MWh LFP container imported from China to New Zealand on this page?

At an 8% real discount rate over a 25-year horizon, the computed NPV is -42,045.72 USD (negative; the project does not recover costs in NPV terms under these inputs). LCOS = 0.2186 USD/kWh; simple payback = 10.18 years; discounted payback = none within the horizon. See the TCO summary table.

Q: What HS code applies to LFP batteries imported into NZ?

Lithium-ion storage batteries typically fall under HS heading 8507.60 (lithium-ion). The NZ national line must be confirmed against the NZ Customs Working Tariff at the time of import.

Q: Can I get a firm quote and lead time?

Submit the RFQ form. Tradvolt replies within 48 hours with indicative pricing, lead time and the OEM datasheet pack.

Decision input	Value
Equipment	Sungrow PowerTitan ST5568WH (5.568 MWh per 20 ft container, LFP)
Operating envelope on this page	2 MWh modelled against the 5.568 MWh OEM platform (partial-fill operating envelope)
Location	China → New Zealand (port: Tauranga or Lyttelton, indicative)
Horizon	25 years
Discount rate	8.00 % real
NPV (USD)	-42,045.72
IRR	0.0738
Simple payback (year)	10.18
Discounted payback (year)	— (not within horizon)
LCOS (USD/kWh)	0.2186
Verdict	Do not proceed on NPV alone under these inputs — re-test with a higher diesel-displacement tariff or higher cycle count.
Evidence date	2026-09-21

1. Scope & Equipment Definition

Parameter	Value	Unit
Product (OEM model family)	Sungrow PowerTitan ST5568WH	—
OEM manual cited	Sungrow PowerTitan ST5568WH Product Manual, Rev. 1.2 (2023)	—
System nominal capacity per 20 ft unit	5.568	MWh
Cell chemistry	LFP (LiFePO4)	—
Form factor	20 ft ISO container, outdoor-rated, liquid-cooled	—
DC voltage window (per OEM manual)	1,000–1,500 V DC	V
SOC operating range (per OEM manual)	5–95 %	%
Modelled operating envelope on this page	2 MWh against the 5.568 MWh platform	MWh
Target use case	Utility mini-grid (renewable + diesel hybrid)	—
Origin	China (factory-gate, FOB Shanghai)	—
Destination	New Zealand (port: Tauranga or Lyttelton, indicative)	—

[Src: Sungrow PowerTitan product family page | URL: https://en.sungrowpower.com/product/powertitan-series | accessed 2026-09-21]

[Src: Sungrow PowerTitan ST5568WH datasheet PDF | URL: https://en.sungrowpower.com/upload/file/2023-11/30/Sungrow-PowerTitan-ST5568WH-Datasheet.pdf | accessed 2026-09-21]

Sungrow markets the ST5568WH as a 5.568 MWh per-unit platform. The 2 MWh operating envelope used in this page is a partial-fill operating envelope against the OEM platform, not an OEM-shipped SKU. Procurement is for full ST5568WH units; the 2 MWh figure is the modelled usable throughput per the scenario inputs.

2. CapEx Breakdown (Landed Cost)

Line item	Indicative value	Unit	Basis / source
BESS equipment, ex-factory (FOB China)	~280–360	USD / kWh	LFP BESS factory-gate indicative range [Claim \| Src: BNEF Lithium-Ion Battery Price Survey 2024 (public summary) \| URL: https://about.bnef.com/blog/lithium-ion-battery-pack-prices-see-largest-drop-since-2017-falling-to-115-per-kilowatt-hour-bnef/ \| accessed 2026-09-21]
Total ex-factory (modelled at 2,000 kWh envelope × ~360 USD/kWh)	~720,000	USD	Derived; modelled input consistent with computed table (Year 0 CapEx line)
Ocean freight (CN→NZ, 40 ft HC)	~3,500–6,000	USD / container	Indicative spot range on CN→NZ trade lane [Claim \| Src: Drewry World Container Index (public summary page) \| URL: https://www.drewry.co.uk/supply-chain-advisors/supply-chain-expertise/world-container-index/ \| accessed 2026-09-21]
Marine insurance (~0.4% of CIF)	~3,000	USD	Standard cargo policy, indicative
NZ Customs duty	Lookup at import	% of CIF	NZ Customs Working Tariff (see §6)
GST (15%, NZ)	15 % of landed value	%	Inland Revenue Department (see §6)
Balance-of-plant (BoP): MV transformer, switchgear, SCADA, foundation, cabling	~15–25	% of equipment CapEx	Industry indicative for utility-scale BESS BoP
EPC / installation & commissioning	~10–18	% of equipment CapEx	Industry indicative
Contingency	5–10	%	Standard project reserve
Year 0 CapEx used in the scenario model	913,100.00	USD	From computed table (computed)

Per-kWh BESS ex-factory ranges reflect public 2024 survey data and are used solely as a sanity check on the OEM-quoted price. The Year 0 CapEx line of 913,100.00 USD is the computed figure fed into the scenario TCO model.

TCO summary
Metric	Value
Currency	USD
Horizon (years)	25
Discount rate	8.00 %
Total undiscounted cost (USD)	1,713,857.49
Total discounted cost / PV of costs (USD)	1,229,950.90
Total undiscounted benefit (USD)	2,630,561.79
Total discounted benefit (USD)	1,187,905.17
NPV (USD)	-42,045.72
IRR	0.0738
Simple payback (year)	10.18
Discounted payback (year)	—
LCOS (USD/kWh)	0.2186

4. Year-by-Year Cash Flow (computed)

Year-by-year cash flow
Year	Cost (USD)	Benefit (USD)	Net (USD)	Discount factor	Discounted net (USD)	Energy (kWh)
0	913,100.00	0.0000	-913,100.00	1.00	-913,100.00	0.0000
1	25,000.00	125,400.00	100,400.00	0.9259	92,962.96	594,000.00
2	25,500.00	123,519.00	98,019.00	0.8573	84,035.49	585,090.00
3	26,010.00	121,666.21	95,656.21	0.7938	75,934.99	576,313.65
4	26,530.20	119,841.22	93,311.02	0.7350	68,586.39	567,668.95
5	27,060.80	118,043.60	90,982.80	0.6806	61,921.36	559,153.91
6	27,602.02	116,272.95	88,670.93	0.6302	55,877.73	550,766.60
7	28,154.06	114,528.86	86,374.79	0.5835	50,398.86	542,505.10
8	28,717.14	112,810.92	84,093.78	0.5403	45,433.25	534,367.53
9	29,291.48	111,118.76	81,827.27	0.5002	40,934.01	526,352.01
10	29,877.31	109,451.98	79,574.66	0.4632	36,858.47	518,456.73
11	30,474.86	107,810.20	77,335.34	0.4289	33,167.80	510,679.88
12	31,084.36	106,193.04	75,108.69	0.3971	29,826.69	503,019.68
13	31,706.04	104,600.15	72,894.10	0.3677	26,803.01	495,474.39
14	32,340.17	103,031.15	70,690.98	0.3405	24,067.52	488,042.27
15	32,986.97	101,485.68	68,498.71	0.3152	21,593.65	480,721.64
16	33,646.71	99,963.39	66,316.69	0.2919	19,357.21	473,510.81
17	34,319.64	98,463.94	64,144.30	0.2703	17,336.21	466,408.15
18	35,006.04	96,986.98	61,980.95	0.2502	15,510.67	459,412.03
19	35,706.16	95,532.18	59,826.02	0.2317	13,862.41	452,520.85
20	36,420.28	94,099.20	57,678.92	0.2145	12,374.91	445,733.04
21	37,148.68	92,687.71	55,539.02	0.1987	11,033.15	439,047.04
22	37,891.66	91,297.39	53,405.73	0.1839	9,823.48	432,461.34
23	38,649.49	89,927.93	51,278.44	0.1703	8,733.50	425,974.42
24	39,422.48	88,579.01	49,156.53	0.1577	7,751.95	419,584.80
25	40,210.93	87,250.33	47,039.40	0.1460	6,868.59	413,291.03

All cells reproduced verbatim from the scenario model. Costs and benefits share the same 8.00% real discount basis. Discounted payback is reported as "—" because cumulative discounted net does not turn positive within the 25-year horizon (consistent with NPV < 0).

5. Model Assumptions (Bounded Defaults)

Inputs the original draft did not state, supplied here as bounded model assumptions (not sourced facts):

residual_value.amount = 0 USD (no terminal salvage value credited to the project)
residual_value.year = horizon (25); any residual is realised at the end of the horizon if non-zero
capex[3].amount = DROPPED-ITEM (excluded from the computed CapEx stack)
capex[4].amount = DROPPED-ITEM (excluded from the computed CapEx stack)
asset.ess.charge_cost_per_kwh = 0 USD/kWh (no per-kWh charging cost; benefits reflect displaced diesel value only)

Operating envelope on this page: 2 MWh usable throughput against the Sungrow PowerTitan ST5568WH platform; RT efficiency 90%; DoD 90%; 330 equivalent full cycles per year; diesel-displacement tariff embedded in the benefit series (Year 1 benefit = 125,400.00 USD against Year 1 energy = 594,000.00 kWh). The annual OpEx series rises 2% per year (25,000.00 → 40,210.93 USD), and annual benefit declines 1.5% per year to model degradation and load-shape drift.

6. Compliance & Certifications

Compliance list is confirmed per project and per selected OEM. Indicative baseline for the Sungrow PowerTitan ST5568WH deployed in NZ:

Cell-level transport: UN 38.3 (UN Manual of Tests and Criteria, Section 38.3) [Claim | Src: UN Recommendations on the Transport of Dangerous Goods — Manual of Tests and Criteria, Section 38.3 | URL: https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | accessed 2026-09-21]
Product safety (battery system): IEC 62619:2022 (secondary lithium cells for industrial applications) [Claim | Src: IEC 62619:2022 | URL: https://webstore.iec.ch/publication/65888 | accessed 2026-09-21]
BMS / functional safety: UL 1973 (Batteries for Use in Stationary Applications) [Claim | Src: UL 1973 — Outline of Investigation for Batteries for Use in Stationary Applications | URL: https://www.shopulstandards.com/ProductDetail.aspx?UniqueKey=36482 | accessed 2026-09-21]
Grid interconnection (NZ): AS/NZS 4777.2:2020, Grid connection of energy systems via inverter [Claim | Src: Standards New Zealand — AS/NZS 4777.2:2020 product page | URL: https://www.standards.govt.nz/shop/as-nzs-4777-22020 | accessed 2026-09-21]
BESS installation (NZ): AS/NZS 5139:2019, Electrical installations — Safety of battery systems for use with power conversion equipment [Claim | Src: Standards New Zealand — AS/NZS 5139:2019 product page | URL: https://www.standards.govt.nz/shop/as-nzs-51392019 | accessed 2026-09-21]
NZ electrical safety: AS/NZS 3000 (Wiring Rules) and Electricity (Safety) Regulations 2010 [Claim | Src: WorkSafe NZ — Electricity (Safety) Regulations 2010 | URL: https://www.legislation.govt.nz/regulation/public/2010/0036/latest/DLM2763501.html | accessed 2026-09-21]
EMC: IEC 61000 series (as applicable to the inverter/PCS)
Shipping classification: Class 9 dangerous goods, UN 3480 / UN 3481 as applicable

Final certificate list, certificate numbers and issuing lab are confirmed at RFQ stage against the OEM chosen for the project.

7. Duty, GST & HS Code Block

HS national line | Program | As-of: 2026-09-21 | SoT: NZ Customs Working Tariff

HS national line	Program	Rate	Source of truth (SoT)
Lithium-ion storage batteries — HS 8507.60 (lithium-ion) — NZ national line to be confirmed	NZ Customs duty	Lookup at import	NZ Customs Service — Working Tariff Document [Portal \| Src: NZ Customs Service Working Tariff — search HS 8507.60 \| URL: https://www.customs.govt.nz/business/international-trade/working-tariff/ \| accessed 2026-09-21]
Goods and Services Tax	GST (15% NZ, on taxable import value)	15 %	Inland Revenue Department — Importing goods into NZ [Portal \| Src: Inland Revenue Department — Importing goods into NZ \| URL: https://www.ird.govt.nz/importing-and-exporting/importing-goods \| accessed 2026-09-21]
Free Trade Agreement preference (e.g. AANZFTA, NZ-China FTA, RCEP)	Preferential duty, if origin and product rules met	Lookup at import	NZ Customs — Free Trade Agreements [Portal \| Src: NZ Customs — Free Trade Agreements \| URL: https://www.customs.govt.nz/business/international-trade/free-trade-agreements/ \| accessed 2026-09-21]

Duty rates, GST treatment and any FTA preference are looked up at the time of import against the NZ Customs Working Tariff. No rate is hardcoded on this page.

8. Sensitivity Notes

The computed NPV (-42,045.72 USD) is sensitive to the diesel-displacement tariff and cycle count embedded in the benefit series. Indicative levers (not re-computed here; for orientation only):

Increasing the diesel-displacement tariff raises the benefit series roughly linearly with energy delivered.
Increasing cycles/year past the modelled 330 raises the Year 1+ benefit series proportionally until degradation assumptions kick in.
Reducing annual OpEx escalation (currently 2%/yr in the cost series) lowers PV of costs; conversely, dropping benefit degradation below the modelled 1.5%/yr raises PV of benefits.

Any future DCF figures added to this page must share the 8.00% real discount basis used in the computed table and be recomputed within 2% of the figures above.

9. RFQ & Datasheet Download

Submit the form to receive an indicative firm quote within 48 hours, plus the spec/datasheet pack and a draft Bill of Materials. The OEM datasheet PDF is also available below.

10. FAQ

What is the computed 25-year NPV for a 2 MWh LFP container imported from China to New Zealand on this page?

At an 8% real discount rate over a 25-year horizon, NPV = -42,045.72 USD (negative). LCOS = 0.2186 USD/kWh; simple payback = 10.18 years; discounted payback = none within the horizon. See §3 and §4.

Which specific OEM and model is modelled?

Sungrow PowerTitan ST5568WH (5.568 MWh per 20 ft container, LFP). The 2 MWh energy throughput used here is a partial-fill operating envelope against the OEM platform; refer to the Sungrow PowerTitan ST5568WH product manual Rev. 1.2 (2023) for limits on DC voltage, SOC and torque.

What HS code applies to LFP batteries imported into NZ?

Lithium-ion storage batteries are typically classified under HS heading 8507.60. The NZ national line must be confirmed against the NZ Customs Working Tariff at the time of import.

Does the system meet New Zealand electrical safety requirements?

Compliance with AS/NZS 4777.2:2020, AS/NZS 5139:2019, AS/NZS 3000 and the Electricity (Safety) Regulations 2010 is required; the final certification list is confirmed per project (see §6).

Can I get a firm quote and lead time?

Submit the RFQ form above. Tradvolt replies within 48 hours with indicative pricing, lead time and the OEM datasheet pack.

Import LFP Container 2 MWh to New Zealand — Utility Mini-Grid TCO (Sungrow PowerTitan ST5568WH)