Import 20 kW Hybrid Inverter from China to Namibia — Resort-Hybrid-20 kW Use Case: TCO & Landed Cost

Verdict (illustrative, 25-year horizon, 8% discount rate, evidence date 2026-09-21): Sungrow SH20T 20 kW hybrid inverter, resort site (CN → Walvis Bay / Windhoek). NPV ≈ USD 5,201; simple payback ≈ 10.12 years; discounted payback ≈ 19.74 years; LCOE ≈ USD 0.0912 / kWh. All duty/VAT rows PENDING — confirm against Namibia Customs at time of import. Financial figures are scenario model output and computed.

Decision table (key figures)

Metric	Value
Equipment model (named)	Sungrow SH20T (three-phase 20 kW hybrid inverter)
Location	Namibia — Walvis Bay / Windhoek delivery
Horizon	25 years
Evidence date	2026-09-21
Limitation	All duties/VAT PENDING — Namibia Customs lookup at import
Currency	USD
Discount rate	8.00 %
Total undiscounted cost	USD 60,724.54
Total discounted cost (PV of costs)	USD 51,433.54
Total undiscounted benefit	USD 140,365.36
Total discounted benefit	USD 56,634.49
NPV	USD 5,200.96
IRR	0.0923
Simple payback	10.12 years
Discounted payback	19.74 years
LCOE	USD 0.0912 / kWh

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1. Equipment model — named & cited

Field	Value
OEM	Sungrow Power Supply Co., Ltd.
Model family / SKU	SH20T (three-phase hybrid inverter, 20 kW)
Manual / datasheet title	Sungrow SH5T / SH8T / SH10T / SH12T / SH15T / SH20T Datasheet	https://en.sungrowpower.com/Uploads/202407/SH5T_8T_10T_12T_15T_20T_Datasheet.pdf
Product page	https://en.sungrowpower.com/product/8/residential-pv-inverter
Battery chemistry (paired BoS)	LFP — e.g., Sungrow SBR series battery module
Operating limits (per OEM datasheet)	Battery port voltage range, MPPT voltage window, max DC voltage, torque values for DC/AC/battery terminals — see OEM datasheet, revision as published at the URL above
Why this model (not "configurable OEM")	SH20T is a publicly marketed Sungrow SKU with a published datasheet covering exactly the 20 kW three-phase hybrid class referenced in this analysis

2. TCO summary (computed — scenario model)

TCO summary
Metric	Value
Currency	USD
Horizon (years)	25
Discount rate	8.00 %
Total undiscounted cost (USD)	60,724.54
Total discounted cost / PV of costs (USD)	51,433.54
Total undiscounted benefit (USD)	140,365.36
Total discounted benefit (USD)	56,634.49
NPV (USD)	5,200.96
IRR	0.0923
Simple payback (year)	10.12
Discounted payback (year)	19.74
LCOE (USD/kWh)	0.0912

3. Year-by-year cash flow (computed — scenario model)

Year-by-year cash flow
Year	Cost (USD)	Benefit (USD)	Net (USD)	Discount factor	Discounted net (USD)	Energy (kWh)
0	45,350.00	0.0000	-45,350.00	1.00	-45,350.00	0.0000
1	480.00	4,674.91	4,194.91	0.9259	3,884.18	54,999.00
2	489.60	4,744.57	4,254.97	0.8573	3,647.95	54,724.00
3	499.39	4,815.27	4,315.87	0.7938	3,426.08	54,450.38
4	509.38	4,887.01	4,377.63	0.7350	3,217.69	54,178.13
5	519.57	4,959.83	4,440.26	0.6806	3,021.97	53,907.24
6	529.96	5,033.73	4,503.77	0.6302	2,838.14	53,637.71
7	540.56	5,108.73	4,568.18	0.5835	2,665.49	53,369.52
8	551.37	5,184.85	4,633.48	0.5403	2,503.33	53,102.67
9	562.40	5,262.11	4,699.71	0.5002	2,351.03	52,837.16
10	573.64	5,340.51	4,766.87	0.4632	2,207.98	52,572.97
11	585.12	5,420.09	4,834.97	0.4289	2,073.64	52,310.11
12	596.82	5,500.85	4,904.03	0.3971	1,947.46	52,048.56
13	608.76	5,582.81	4,974.05	0.3677	1,828.95	51,788.31
14	620.93	5,665.99	5,045.06	0.3405	1,717.65	51,529.37
15	633.35	5,750.42	5,117.07	0.3152	1,613.11	51,271.72
16	646.02	5,836.10	5,190.08	0.2919	1,514.93	51,015.37
17	658.94	5,923.05	5,264.12	0.2703	1,422.73	50,760.29
18	672.12	6,011.31	5,339.19	0.2502	1,336.13	50,506.49
19	685.56	6,100.88	5,415.32	0.2317	1,254.79	50,253.96
20	699.27	6,191.78	5,492.51	0.2145	1,178.41	50,002.69
21	713.25	6,284.04	5,570.78	0.1987	1,106.67	49,752.67
22	727.52	6,377.67	5,650.15	0.1839	1,039.29	49,503.91
23	742.07	6,472.70	5,730.63	0.1703	976.01	49,256.39
24	756.91	6,569.14	5,812.23	0.1577	916.58	49,010.11
25	772.05	6,667.02	5,894.97	0.1460	860.77	48,765.06

Discount factor = 1 / (1 + 0.08)^year. Net = Benefit − Cost. Discounted net = Net × Discount factor. Energy column = annual PV generation (kWh) used in the benefit calculation.

4. Use case profile

Parameter	Value
Site	Namibian resort (e.g., Erongo / Zambezi region)
Load	Lodges, kitchen cold-chain, lighting, water pumping
PV array (typical pairing)	~25–30 kWp monocrystalline
Battery (LFP)	~40–60 kWh LFP rack
Inverter role	PV + battery + diesel-genset AC-coupling, three-phase 400 V
Operating hours target	≥ 12 h/day autonomous, with genset back-up

5. CapEx (landed into Namibia)

Line	Description	USD (illustrative)
EXW unit (1 pc)	Sungrow SH20T 20 kW three-phase hybrid inverter	PENDING — RFQ
Quantity	1 pc (typical resort install)	1
Sea freight CN → Walvis Bay	1 pc in wooden crate, LCL or 20′ GP (verify dims)	PENDING — RFQ
Insurance	0.3 % of CIF (typical)	PENDING — RFQ
CIF value	EXW + freight + insurance	PENDING — RFQ
Import duty	Namibia Customs — PENDING — lookup	PENDING
VAT	Namibia VAT — PENDING — lookup	PENDING
Customs broker + WH handling	Walvis Bay or Windhoek ICD	~ USD 250–450
Road transport to site	Walvis Bay → resort (variable)	PENDING — RFQ
Install + commissioning	By Namibian EPC partner, not Tradvolt scope	By buyer
Indicative landed cost (DDP-like, ex-installation)	CIF + duty + VAT + broker + inland	PENDING — RFQ

6. OpEx (annual) — bounded defaults

Item	Frequency	USD / year (illustrative)
Firmware updates / remote monitoring	Included by Sungrow (iSolarCloud) — verify SKU	0
Preventive service (filter, fans, torque)	Annual by local EPC	~ 120–250
Spare parts (fans, contactors)	Annual allowance	~ 80–150
Insurance (asset)	Annual	~ 0.5 % of landed CapEx
Diesel genset fuel (residual, post-hybrid)	Reduced vs. diesel-only	Site-specific
Total OpEx ex-fuel	Year 1–25	~ 200–400 + insurance

7. Model inputs — every numeric input with source row

Input	Value	Type	Source / lookup path
Discount rate (WACC)	8.00 %	Model assumption	Scenario model default — bounded assumption
Horizon	25 years	Model assumption	Scenario model default — bounded assumption
Year 0 CapEx (USD)	45,350.00	Model assumption	Scenario model default — bounded assumption
Year 1 OpEx (USD)	480.00	Model assumption	Scenario model default — bounded assumption
OpEx escalation	2.00 % / yr	Model assumption	Scenario model default — bounded assumption
Diesel price (NAD/L)	25.00 (base); 22.00 (low); 28.00 (high)	PENDING — lookup	Lookup path: Namibia Petroleum Corporation / Ministry of Mines and Energy publications at import time — https://www.mme.gov.na/divisions/energy
Namibia PV yield	2,200 kWh/kWp/yr	Model assumption (bounded)	Placeholder default — confirm against a country-specific irradiance dataset such as the Global Solar Atlas (https://globalsolaratlas.info/download/namibia) or Solargis country file
Year-1 benefit (USD)	4,674.91	Model assumption	Scenario model default — bounded assumption
Benefit escalation	1.49 % / yr	Model assumption	Scenario model default — bounded assumption
Year-1 energy (kWh)	54,999.00	Model assumption	Scenario model default — bounded assumption
PV degradation	0.50 % / yr	Model assumption (bounded default)	Typical industry default for monocrystalline modules — confirm against module manufacturer datasheet (e.g., LONGi, Jinko, Trina) at RFQ
Residual value (amount)	PENDING — RFQ	Model assumption (bounded default)	Scenario model default = 0 — bounded assumption
Residual value (year)	PENDING — RFQ	Model assumption (bounded default)	Scenario model default = end of horizon — bounded assumption
asset.pv.degradation_pct_per_year	0.50 %	Model assumption (bounded default)	Industry-typical default — bounded assumption
asset.pv.tariff_per_kwh (self-consumption)	PENDING — buyer input	Model assumption (bounded default)	Not stated in draft — bounded assumption set to displaced-diesel-equivalent in the model
asset.pv.tariff_escalation_pct	1.49 %	Model assumption (bounded default)	Scenario model default — bounded assumption
asset.pv.self_consumption_pct	PENDING — buyer input	Model assumption (bounded default)	Not stated in draft — bounded assumption set by model; buyer to confirm against site load profile
asset.pv.export_tariff_per_kwh	PENDING — buyer input	Model assumption (bounded default)	Not stated in draft — Namibia export tariff to be confirmed with ECB / Nampower; bounded assumption set to 0 in the model (no export revenue assumed)

All blue cells are model assumptions (bounded defaults), not sourced facts. All yellow cells are PENDING and require buyer / regulator lookup before relying on the TCO.

8. Compliance & certifications

Standard	Scope	Document / issuer
IEC 62109-1 / -2	Safety of power converters for use in photovoltaic power systems	IEC Webstore — IEC 62109-1:2010 / IEC 62109-2:2011 (https://webstore.iec.ch/publication/6391); certificate IDs must appear on the OEM datasheet
IEC 61727 / IEC 62116	Grid interconnection & anti-islanding	IEC Webstore — IEC 61727:2004 (https://webstore.iec.ch/publication/3280) and IEC 62116:2014 (https://webstore.iec.ch/publication/22737); certificate IDs on OEM datasheet
CE marking	EU conformity (EMC + LVD)	EU Regulation 765/2008 (https://eur-lex.europa.eu/eli/reg/2008/765/oj) and Decision 768/2008/EC (https://eur-lex.europa.eu/eli/dec/2008/768/oj); verify on datasheet
Namibia ECB / Nampower grid code	Local utility approval	Electricity Act, 2007 (Namibia), administered by the Electricity Control Board — https://www.ecb.org.na/ — buyer to confirm connection requirements at RFQ
Battery transport (UN 38.3)	Lithium battery transport safety	UN Manual of Tests and Criteria, Part III, 38.3 — https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria — required for sea-freight (Walvis Bay)

Tradvolt does not assert any certificate number, test lab, or ranking on this page. Confirm the exact certificate IDs from the OEM datasheet supplied with the RFQ reply.

9. Duty / HS / VAT block (Namibia)

Item	Reference	SoT
HS national line (typical chapter 85.04 — static converters / inverters)	PENDING — lookup	Lookup path: USITC HTS (https://hts.usitc.gov/?query=inverter) for the US/WCO 6-digit baseline; confirm against the official Namibia Customs & Excise tariff at import (https://www.customs.gov.na/)
Import duty	PENDING — lookup	Namibia Customs & Excise (https://www.customs.gov.na/)
VAT	PENDING — lookup	Namibia Revenue Agency — VAT Act reference (https://www.namra.org/)
EPZ / renewable-energy rebate eligibility	PENDING — lookup	Ministry of Industrialisation & Trade / Namibia Investment Promotion & Development Board (https://www.nipdb.com/)

All duty and VAT rates on this page are marked PENDING — lookup. Confirm the exact HS national line, duty rate, VAT rate, and any rebates at the time of import.

10. FAQ

What is the typical payback for a 20 kW resort hybrid system in Namibia?

On the scenario model outputs above, illustrative simple payback is 10.12 years and discounted payback (8 % WACC) is 19.74 years over a 25-year horizon. NPV ≈ USD 5,201; LCOE ≈ USD 0.0912 / kWh. These are NOT a quote.

Which HS code applies to a 20 kW hybrid inverter imported into Namibia?

The exact HS national line must be confirmed against the official Namibia Customs tariff at the time of import. All duty/VAT rows above are PENDING — lookup.

Which certifications should I request for Namibia-bound shipments?

At minimum: IEC 62109-1/-2 (safety), IEC 61727 / IEC 62116 (grid interconnection), and CE marking. Confirm certificate numbers on the Sungrow SH20T datasheet before issuing the PO.

Does Tradvolt publish a fixed retail price?

No. Pricing depends on SKU, qty, Incoterm, cert pack, and destination — submit the RFQ form for a binding quote.

Can OpEx savings exceed diesel generator running costs?

In Namibian resort sites the displaced fuel is typically diesel. The savings shown are ILLUSTRATIVE and depend on a verified diesel price and average runtime — both must be confirmed by the buyer.

11. RFQ & datasheet

Need the datasheet first?

Download the Sungrow SH20T datasheet to evaluate dimensions, MPPT count, battery port rating, and supported communication protocols before requesting a quote.