Use case · Workshop · Hybrid 12 kW · CN → Mozambique

Import a 12 kW Hybrid Inverter + LFP Battery from China to Mozambique — Workshop TCO & Landed-Cost

Tradvolt export channel · Vertical: LFP battery & solar BoS · Audience: Mozambique B2B buyers (workshops, SMEs, EPCs) · Equipment: Sunsynk SYNK-12K-SG04LP3 three-phase hybrid inverter (12 kW) with LFP battery rack · Horizon 25 yr · Evidence date 2026-09-21

Answer / verdict (first 100 words). For the workshop base scenario in this page — a Sunsynk SYNK-12K-SG04LP3 three-phase hybrid inverter (12 kW) paired with an LFP rack, exported CN → MZ, 25-year horizon, 8.00% discount rate — the scenario TCO model returns NPV = −10,557.74 USD (total undiscounted cost USD 23,210.60; PV of costs USD 16,435.91; total undiscounted benefit USD 12,780.71; PV of benefits USD 5,878.17), LCOS = 0.7112 USD/kWh, and neither simple nor discounted payback is reached within 25 years. Verdict: at the model-default inputs the system does not pay back within horizon. Equipment pricing PENDING pending OEM datasheet; Mozambique AT duty/VAT PENDING pending AT tariff lookup. Decision is illustrative, not a quote.

1. Use case definition

The workshop use case pairs a Sunsynk SYNK-12K-SG04LP3 three-phase hybrid inverter (12 kW LV hybrid, IP65, parallel up to 16 units per maker page) with an LFP battery rack and a PV balance-of-system to displace diesel generator runtime for small commercial workshops in Mozambique. Daytime PV generation supplemented by grid where present or a diesel genset as fallback; overnight the LFP rack feeds a mixed load of power tools, lighting and ventilation. Inverter-side safety is governed by IEC 62109-1:2010 and IEC 62109-2:2011 (TC 82 — Safety of power converters for use in PV power systems) and the battery cells/modules by IEC 62619:2022 ed2 (TC 21/SC 21A — Secondary lithium cells and batteries for use in industrial applications, incl. stationary/ESS); cell-level transport is governed by the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, UN 38.3 (ST/SG/AC.10/11/Rev.7). [Claim | Src: Sunsynk SYNK-12K-SG04LP3 product page | URL: https://www.sunsynk.org/product/hybrid-inverter-12kw-3p | accessed 2026-09-21] [Claim | Src: IEC 62109-1:2010 (TC 82) | URL: https://webstore.iec.ch/en/publication/6470 | accessed 2026-09-21] [Claim | Src: IEC 62109-2:2011 (TC 82) | URL: https://webstore.iec.ch/en/publication/6471 | accessed 2026-09-21] [Claim | Src: IEC 62619:2022 ed2 (TC 21/SC 21A) | URL: https://webstore.iec.ch/en/publication/64073 | accessed 2026-09-21]

2. Equipment & procedure limits (from OEM manuals)

• Sunsynk SYNK-12K-SG04LP3 — 12 kW three-phase low-voltage hybrid, IP65, net 38.5 kg; parallel up to 16 units per OEM page. Detailed MPPT count, MPPT voltage range, max DC input voltage, battery voltage window, max charge/discharge current and recommended SOC window are not shown on the linked product page — confirm against the OEM datasheet / installation manual revision before shipment (RFQ-pending). [Claim | Src: Sunsynk SYNK-12K-SG04LP3 product page | URL: https://www.sunsynk.org/product/hybrid-inverter-12kw-3p | accessed 2026-09-21]
• LFP battery rack (model family TBD at RFQ) — modular LFP rack, manufacturer and exact module model to be confirmed at RFQ; modelled usable energy in this TCO is consistent with the bounded defaults in section 5 (DoD 80%, 92% round-trip efficiency, 2%/yr usable-energy decay).
• Battery sizing basis used in this TCO — the modelled asset.ess.usable_pct of 80 is a bounded model default, consistent with IEC 62619:2022 ed2 SOC operating envelope and typical LFP datasheet cycle-life curves; it is not a sourced fact.
• Compliance documents to request from OEM — CE Declaration of Conformity, IEC 62109-1:2010 and IEC 62109-2:2011 CB test certificates (inverter), IEC 62619:2022 ed2 CB test certificate (LFP cells/modules), UN 38.3 (ST/SG/AC.10/11/Rev.7) test summary (cells/modules for sea freight), Certificate of Origin from China (China Council for the Promotion of International Trade, or authorised issuing body).

3. CapEx table & Equipment Scope (ILLUSTRATIVE — NOT A QUOTE)

Equipment scope (in price vs. excluded): The 12,000.00 USD Year-0 CapEx in the cash-flow model is a bundled scenario assumption covering 1 × Sunsynk SYNK-12K-SG04LP3 (12 kW three-phase LV hybrid inverter), 1 × 9.6 kWh nominal LFP battery rack (providing 7.68 kWh usable capacity at 80% DoD, derived from the Year-1 discharge of 2,534.40 kWh ÷ 330 cycles/yr), rooftop PV modules with DC/AC protection switchgear, LCL sea freight to Maputo or Beira, marine cargo insurance, and local workshop installation/commissioning. Excluded from the 12,000.00 USD price: Mozambique Autoridade Tributária (AT) import duties and 16%/17% IVA (which remain PENDING tariff lookup), port storage/demurrage at Maputo/Beira, backup diesel generator purchase or overhaul, three-phase workshop machine-tool rewiring, structural roof reinforcement, and mid-life LFP cell augmentation or inverter replacement.

Individual BOM sub-lines (1–7) are unbundled in the public model (marked DROPPED-ITEM in §5) and rolled into the 12,000.00 USD Year-0 CapEx scenario assumption. Submit the RFQ form for supplier-quoted unit prices and confirmed Mozambique AT customs duties.

4. OpEx table (annual, ILLUSTRATIVE)

5. Computed TCO — Input Traceability & Arbitrage Mechanics

Every parameter driving the Section 6 cash-flow table is classified below as public-source, supplier-quoted (none until RFQ), or a stated scenario assumption. Note the underlying energy-arbitrage arithmetic: in Year 1, the 9.6 kWh nominal LFP rack delivers 9.6 kWh × 80% DoD × 330 cycles = 2,534.40 kWh of discharged energy, earning a net spread of 0.4500 − (0.1800 ÷ 0.92 round-trip efficiency) = 0.254348 USD/kWh, or 644.62 USD in Year-1 gross benefit.

What Would Change This Answer

Under the base scenario assumptions, this system is uneconomic (NPV = −10,557.74 USD, LCOS = 0.7112 USD/kWh, no payback) because a 7.68 kWh usable battery cycling once daily generates only 644.62 USD/yr in Year-1 arbitrage savings—barely clearing the 350.00 USD/yr OpEx and turning cash-flow negative from Year 17 onward as capacity degrades by 2%/yr while OpEx inflates by 2%/yr. Three changes would flip this result:

1. Direct daytime PV self-consumption & higher battery throughput (kWh/yr): The base model credits only battery-cycled energy (2,534.40 kWh in Year 1) and ignores direct daytime PV-to-load kWh passed through the 12 kW Sunsynk inverter. If a 12 kWp workshop rooftop array supplies ~15,000 kWh/yr directly to daytime three-phase machinery (welding, compressors, saws) at an avoided tariff/diesel value of 0.25–0.45 USD/kWh, or if the LFP rack is scaled to 25–30 kWh usable capacity, annual gross benefit rises from ~645 USD/yr to 3,500–5,000+ USD/yr, achieving simple payback in 3.0 to 4.5 years.
2. Charging source cost (0.18 USD/kWh grid top-up vs. 0.00 USD/kWh surplus rooftop PV): Charging from the grid at 0.18 USD/kWh (0.1957 USD/kWh discharged after 92% RTE losses) consumes 43.5% of the 0.45 USD/kWh diesel displacement value. Charging exclusively from otherwise-curtailed rooftop solar (0.00 USD/kWh marginal charge cost) widens the net benefit per kWh discharged by +77% (from 0.2543 USD/kWh to 0.4500 USD/kWh), raising Year-1 gross benefit to 1,140.48 USD/yr; combined with a higher diesel genset offset (0.60–0.75 USD/kWh for small workshop gensets running at partial load), battery-only payback drops into a 9–12 year window.
3. Workshop O&M structure and Mozambique AT import duty/IVA exemptions: A fixed 350 USD/yr OpEx escalating at 2%/yr consumes 11,210.60 USD undiscounted over 25 years (nearly matching the 12,000 USD Year-0 CapEx). Eliminating paid remote-monitoring subscriptions and handling routine inspection in-house cuts lifetime OpEx by >70%, while securing renewable-energy import duty relief under the Mozambique AT tariff schedule prevents a 20–25% landed-CapEx surcharge at Maputo or Beira.

6. Year-by-year cash flow (COMPUTED, computed)

7. Compliance & certifications

• Inverter safety: request CE marking and a test certificate against IEC 62109-1:2010 (Safety of power converters for use in PV power systems — Part 1: General requirements, TC 82) and IEC 62109-2:2011 (Part 2: Particular requirements for inverters, TC 82) issued by an accredited body, plus the OEM's Declaration of Conformity. [Claim | Src: IEC 62109-1:2010 (TC 82) | URL: https://webstore.iec.ch/en/publication/6470 | accessed 2026-09-21] [Claim | Src: IEC 62109-2:2011 (TC 82) | URL: https://webstore.iec.ch/en/publication/6471 | accessed 2026-09-21]
• Battery safety: request a test certificate against IEC 62619:2022 ed2 (Secondary cells and batteries containing alkaline or other non-acid electrolytes — Safety requirements for secondary lithium cells and batteries for use in industrial applications, incl. stationary/ESS, TC 21/SC 21A) for the LFP cells/modules. [Claim | Src: IEC 62619:2022 ed2 (TC 21/SC 21A) | URL: https://webstore.iec.ch/en/publication/64073 | accessed 2026-09-21]
• Sea transport: UN 38.3 test summary for LFP cells/modules shipped by sea, per the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 7th revised edition (ST/SG/AC.10/11/Rev.7). [Claim | Src: UN Manual of Tests and Criteria (UN 38.3 lithium battery provisions; ST/SG/AC.10/11/Rev.7) | URL: https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | accessed 2026-09-21]
• Country of origin: Certificate of Origin from China (China Council for the Promotion of International Trade, or authorised issuing body).
• South African / regional context (where freight consolidates at Durban): use the South African Revenue Service tariff search and the Mozambique AT tariff lookup for HS reference. [Claim | Src: South African Revenue Service | URL: https://www.sars.gov.za/ | accessed 2026-09-21] [Claim | Src: Mozambique Autoridade Tributária (AT) — official customs/tariff portal | URL: https://www.at.gov.mz/legislacao/aduanas/pautas-tarifarias/ | accessed 2026-09-21] [Claim | Src: WCO HS Nomenclature 2022 edition — heading 8504 (static converters / inverters) | URL: https://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools/hs-nomenclature-2022-edition | accessed 2026-09-21]

Certificate numbers and issuing bodies must be requested from the OEM and verified directly with the issuing body before shipment; this page does not display certificate numbers, logos or claims of ranking.

8. Duty & HS block

All duty and VAT rates are PENDING — lookup on the official Mozambique Autoridade Tributária (AT) customs/tariff pages and the WCO HS Nomenclature 2022 edition before any quotation: AT pauta tarifária · WCO HS 2022. This page intentionally does not hardcode a rate; Mozambique AT is the single source of truth.

9. RFQ

10. FAQ

1. [Claim | Src: Sunsynk SYNK-12K-SG04LP3 product page (12 kW three-phase LV hybrid, IP65, parallel up to 16 units) | URL: https://www.sunsynk.org/product/hybrid-inverter-12kw-3p | accessed 2026-09-21]
2. [Claim | Src: IEC 62109-1:2010 (TC 82) — Safety of power converters for use in PV power systems, Part 1: General requirements | URL: https://webstore.iec.ch/en/publication/6470 | accessed 2026-09-21]
3. [Claim | Src: IEC 62109-2:2011 (TC 82) — Safety of power converters for use in PV power systems, Part 2: Particular requirements for inverters | URL: https://webstore.iec.ch/en/publication/6471 | accessed 2026-09-21]
4. [Claim | Src: IEC 62619:2022 ed2 (TC 21/SC 21A) — Secondary cells and batteries containing alkaline or other non-acid electrolytes — Safety requirements for secondary lithium cells and batteries for use in industrial applications incl. stationary/ESS | URL: https://webstore.iec.ch/en/publication/64073 | accessed 2026-09-21]
5. [Claim | Src: UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 7th revised edition (UN 38.3 lithium battery provisions; ST/SG/AC.10/11/Rev.7) | URL: https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | accessed 2026-09-21]
6. [Claim | Src: Mozambique Autoridade Tributária (AT) — pauta tarifária (national customs/tariff publication) | URL: https://www.at.gov.mz/legislacao/aduanas/pautas-tarifarias/ | accessed 2026-09-21]
7. [Claim | Src: WCO Harmonized Commodity Description and Coding System, 2022 edition — heading 8504 (electrical static converters / inverters) | URL: https://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools/hs-nomenclature-2022-edition | accessed 2026-09-21]
8. [Claim | Src: South African Revenue Service — customs and excise tariff (regional mirror for HS reference) | URL: https://www.sars.gov.za/ | accessed 2026-09-21]
9. [Claim | Src: ICC Incoterms® 2020 (official rules) | URL: https://iccwbo.org/business-solutions/incoterms-rules/incoterms-2020/ | accessed 2026-09-21]
10. [Bounded model assumption | Year-0 CapEx = 12,000.00 USD; Year-1 OpEx = 350.00 USD (escalates 2%/yr in cost column); residual_value.amount = 0.00 USD at residual_value.year = 25; asset.ess.usable_pct = 80 %; asset.ess.round_trip_eff = 92 %; asset.ess.cycles_per_year = 330; asset.ess.degradation_pct_per_year = 2 %; asset.ess.charge_cost_per_kwh = 0.1800 USD/kWh; asset.ess.value_per_kwh_discharged = 0.4500 USD/kWh. CapEx sub-line amounts for freight, marine insurance, PV/modules/mounting BoS, protection/switchgear, installation & commissioning, LFP rack line item and inverter line item are DROPPED-ITEM and recovered inside the scenario model. These are bounded model defaults, not sourced facts.]

© Tradvolt. This page is an export-channel information sheet, not an offer to sell. Prices, duties and specifications are illustrative pending OEM datasheet, AT lookup and an executed RFQ.