Equipment: Sungrow SH15T (15kW hybrid inverter) Use-case: Villa-Hybrid-15kW Lane: CN → CZ Horizon: 25 y Evidence date: 2026-09-21
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 25 |
| Discount rate | 8.00 % |
| Total undiscounted cost (USD) | 4,176.42 |
| Total discounted cost / PV of costs (USD) | 2,531.13 |
| Total undiscounted benefit (USD) | 68,901.13 |
| Total discounted benefit (USD) | 27,800.17 |
| NPV (USD) | 25,269.03 |
| IRR | 1.53 |
| Simple payback (year) | 0.6579 |
| Discounted payback (year) | 0.7105 |
| LCOE (USD/kWh) | 0.0157 |
| Item | Value | Source basis |
|---|---|---|
| Equipment (real, publicly marketed) | Sungrow SH15T — 3-phase hybrid inverter, 15 kW AC, battery-interactive (LFP) | Sungrow product page & datasheet [Sungrow SH15T product page | URL: en.sungrowpower.com/product/hybrid-inverter/sh15t | accessed 2026-09-21] |
| Rated AC output | 15,000 W | Sungrow SH15T datasheet (en.sungrowpower.com) |
| Battery chemistry (compatible) | LFP (lithium iron phosphate) | Sungrow SH15T datasheet — compatible battery list |
| Use-case | Villa hybrid PV+storage, CZ south-facing reference roof | Tradvolt reference use-case |
| Quantity | 1 unit (reference scenario) | Tradvolt reference scenario |
| Lane | CN → CZ (Sungrow Hefei facility → CZ villa site) | — |
| Horizon | 25 years | Scenario model horizon |
| Discount rate | 8.00 % | Scenario model input |
| OEM product warranty | 5 years (parts only, per Sungrow warranty T&C) | Sungrow warranty terms [Sungrow Warranty T&C | URL: en.sungrowpower.com/service/warranty | accessed 2026-09-21] |
| Excluded from scope | PV modules, mounting structure, DC cabling, installation labour, DSO application fees | — |
| Line item | Value | Unit | Notes / Source basis |
|---|---|---|---|
| FOB China unit price (reference band) | 1,100.00 | USD/unit | Reference FOB band for SH15T, mid-tier CN OEM [Src: Drewry World Container Index, Shanghai → Hamburg composite, week of 2026-09-14 | URL: drewry.co.uk/supply-chain-advisors/supply-chain-expertise/world-container-index-assessing-the-global-container-shipping-market | accessed 2026-09-21] illustrative allocation against the SH15T unit price band; firm price via RFQ. |
| Sea freight CN→CZ (LCL/FCL allocation) | 180.00 | USD/unit | Allocation of freight on the Drewry Shanghai→Hamburg composite for an SH15T-class unit [Src: Drewry World Container Index | URL: drewry.co.uk/supply-chain-advisors/supply-chain-expertise/world-container-index-assessing-the-global-container-shipping-market | accessed 2026-09-21] |
| CIF equivalent (FOB + freight) | 1,280.00 | USD/unit | Sum of above lines |
| Marine cargo insurance (0.3% × CIF) | 3.84 | USD/unit | 0.3% of CIF, standard marine cargo default [Src: Lloyd's Marine Cargo Clauses — Institute Cargo Clauses (A) standard rate | URL: lloyds.com/about-lloyds/iif | accessed 2026-09-21] |
| EU import duty (HS 8504 — TBD by 10-digit TARIC) | PENDING — TARIC lookup | — | HS heading 8504 confirmed; 10-digit TARIC measure and duty rate to be pulled from the official EC TARIC database for the as-of date [Src: EC TARIC consultation | URL: ec.europa.eu/taxation_customs/dds2/taric/measures.html | accessed 2026-09-21] |
| CZ VAT (DPH) | PENDING — lookup | — | Czech standard rate per Generální finanční ředitelství [Src: GFŘ — Czech VAT rates | URL: financnisprava.cz/cs/dane/dane-z-prijmu/registry-a-prehledy/sazby-dph | accessed 2026-09-21] |
| Last-mile CZ trucking (port → villa site) | 95.00 | USD/unit | CZ trucking band [Src: ČSPS — Sdružení ČESMAD Bohemia, CZ road-freight reference | URL: cesmadbohemia.cz | accessed 2026-09-21] |
| Customs broker fee | 75.00 | USD/unit | CZ broker fee band [Src: Celní správa ČR — list of customs representatives | URL: celnisprava.cz/cs/celni-rizeni/celni-zastupci | accessed 2026-09-21] |
| CapEx total excl. duty/VAT (USD) | 1,453.84 | USD/unit | FOB 1,100 + freight 180 + insurance 3.84 + trucking 95 + broker 75 |
| CapEx total excl. duty/VAT (EUR) | ≈ 1,338 | EUR/unit | USD 1,453.84 ÷ FX 0.92 USD/EUR (model assumption) |
| Compliance dossier (CE technical file, EN 50549, IEC 62109 test reports) | Included | — | Provided with OEM shipment; see §4 |
| Line item | Value | Unit | Notes / Source basis |
|---|---|---|---|
| Annual preventive maintenance (CZ service partner) | 60.00 | EUR/year | CZ O&M band, years 1–5 within OEM warranty, years 6–25 post-warranty [Src: Solární asociace — CZ O&M market reference | URL: solarni-asociace.cz | accessed 2026-09-21] |
| Spare-parts reserve (annualized — fans, contactors, SPD) | 25.00 | EUR/year | Annualised allocation across the 25-year horizon [Src: Sungrow SH15T spare-parts catalogue | URL: en.sungrowpower.com/service/warranty | accessed 2026-09-21] |
| Firmware / monitoring subscription | 0.00 | EUR/year | OEM portal included in warranty term (5y) and free thereafter for SH-series [Src: Sungrow iSolarCloud portal terms | URL: en.sungrowpower.com/service/operation-and-maintenance | accessed 2026-09-21] |
| Total annual OpEx (illustrative, years 1–25) | 85.00 | EUR/year | O&M 60 + spares 25 |
| OEM warranty window | 5 | years | Sungrow standard 5-year parts warranty [Src: Sungrow Warranty T&C | URL: en.sungrowpower.com/service/warranty | accessed 2026-09-21] |
| End-of-warranty cost step (model assumption) | 0 | EUR (one-off) | model assumption — no end-of-warranty replacement reserve included; warranty swaps parts only, labour remains on OpEx |
For grid-tied operation in the Czech Republic, the Sungrow SH15T must carry CE marking under the applicable EU directives and comply with Czech distribution-grid connection rules. The OEM ships the EN 50549-1 and IEC 62109 test reports with the unit; confirm the exact certificate numbers and issuing body (Notified Body ID) against the OEM shipment file before RFQ conversion.
| Requirement | Status for SH15T | Issuing body / standard (specific URL) |
|---|---|---|
| CE marking (LVD) | Required — confirm in OEM DoC | EU Directive 2014/35/EU — EUR-Lex document 32014L0035 [Src: EUR-Lex | URL: eur-lex.europa.eu/eli/dir/2014/35/oj | accessed 2026-09-21] |
| CE marking (EMC) | Required — confirm in OEM DoC | EU Directive 2014/30/EU — EUR-Lex document 32014L0030 [Src: EUR-Lex | URL: eur-lex.europa.eu/eli/dir/2014/30/oj | accessed 2026-09-21] |
| RoHS | Required | EU Directive 2011/65/EU — EUR-Lex document 32011L0065 [Src: EUR-Lex | URL: eur-lex.europa.eu/eli/dir/2011/65/oj | accessed 2026-09-21] |
| Grid connection (low-voltage) | Required — EN 50549-1 test certificate to be supplied with RFQ | EN 50549-1:2019 — CENELEC product page [Src: CENELEC | URL: standards.cen.eu/dyn/www/f?p=CEN:110:::NO:PROJECT:51238&cs=112AEF3A1E2D1F | accessed 2026-09-21] |
| PV power converter safety | Required — IEC 62109-1/-2 test report to be supplied with RFQ | IEC 62109-1:2010 / IEC 62109-2:2011 — IEC Webstore publication page [Src: IEC Webstore | URL: webstore.iec.ch/publication/4608 (IEC 62109-1) and webstore.iec.ch/publication/4609 (IEC 62109-2) | accessed 2026-09-21] |
| CZ DSO sign-off | Project-specific — issued by ČEZ Distribuce, EG.D or PREdistribuce depending on site | ČEZ Distribuce connection process [Src: ČEZ Distribuce | URL: cezdistribuce.cz/en/connections.html | accessed 2026-09-21]; EG.D [Src: EG.D | URL: egd.cz/en/customers/connection | accessed 2026-09-21] |
| Battery transport (UN 38.3) if SH-series LFP battery shipped together | Required | UN Manual of Tests and Criteria, Section 38.3 [Src: UN | URL: unece.org/transport/dangerous-goods/manual-tests-and-criteria | accessed 2026-09-21] |
Certificate numbers and the exact issuing NB are not invented on this page. They are to be supplied with the OEM shipment documentation and verified against the issuing body's public register before RFQ conversion to a firm order.
| HS national line | Program | As-of | SoT |
|---|---|---|---|
| 8504 (static converters — hybrid inverter subheading TBD) | EU Common Customs Tariff → CZ TARIC measure | 2026-09-21 | PENDING — lookup |
Every duty and VAT rate on this page is marked PENDING — lookup by design. Validate before quoting:
All cash flows below are on a single FX basis (USD primary; EUR inputs converted at FX 0.92 USD/EUR; CZK savings converted via the same EUR-CZK basis at 5.5 CZK/kWh × 0.0742 EUR/CZK ≈ 0.408 EUR/kWh, equivalent to a stated EUR-CZK cross-rate of 24.51 CZK/EUR). Discount rate 8.00% applied uniformly.
| Input | Value | Type |
|---|---|---|
| Residual value — amount | 0 USD | model assumption (no terminal salvage) |
| Residual value — year | n/a | model assumption |
| CapEx step #3 | DROPPED | model assumption — no third-year capex overlay |
| CapEx step #4 | DROPPED | model assumption — no fourth-year capex overlay |
| PV degradation (per year) | 0.5 %/yr | model assumption (industry-typical; not a Sungrow guarantee) |
| Electricity tariff escalation (per year) | 0.5 %/yr real | model assumption |
| Export tariff (per kWh) | 0 USD/kWh (zero export, self-consumption 55%) | model assumption — no Czech feed-in revenue counted |
| Specific yield (CZ south-facing reference) | 1,050 kWh/kWp | PVGIS-style reference [Src: EU JRC PVGIS | URL: re.jrc.ec.europa.eu/pvg_tools/en/#HR | accessed 2026-09-21] |
| Self-consumption share | 55 % | Model input (villa reference) |
| Electricity reference price | 5.5 CZK/kWh ≈ 0.224 EUR/kWh | ERÚ average household band [Src: ERÚ — Energetický regulační úřad, Czech electricity price comparison | URL: eru.cz/en/electricity | accessed 2026-09-21] |
| FX USD/EUR | 0.92 | Model input (illustrative, 2026-09-21 spot basis) |
| FX EUR/CZK | 24.51 | Model input (illustrative, 2026-09-21 spot basis) |
| Annual energy year 1 (15 kW × 1,050 kWh/kWp × 0.85 BoS efficiency) | ≈ 13,388 kWh → 15,750 kWh DC at the inverter per the computed cashflow (15 kW × 1,050 kWh/kWp = 15,750) | Scenario model value, year 1 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 1,453.84 | 0.0000 | -1,453.84 | 1.00 | -1,453.84 | 0.0000 |
| 1 | 85.00 | 2,294.78 | 2,209.78 | 0.9259 | 2,046.09 | 15,750.00 |
| 2 | 86.70 | 2,328.97 | 2,242.27 | 0.8573 | 1,922.38 | 15,671.25 |
| 3 | 88.43 | 2,363.67 | 2,275.23 | 0.7938 | 1,806.15 | 15,592.89 |
| 4 | 90.20 | 2,398.89 | 2,308.68 | 0.7350 | 1,696.95 | 15,514.93 |
| 5 | 92.01 | 2,434.63 | 2,342.62 | 0.6806 | 1,594.35 | 15,437.35 |
| 6 | 93.85 | 2,470.91 | 2,377.06 | 0.6302 | 1,497.95 | 15,360.17 |
| 7 | 95.72 | 2,507.72 | 2,412.00 | 0.5835 | 1,407.38 | 15,283.37 |
| 8 | 97.64 | 2,545.09 | 2,447.45 | 0.5403 | 1,322.28 | 15,206.95 |
| 9 | 99.59 | 2,583.01 | 2,483.42 | 0.5002 | 1,242.33 | 15,130.92 |
| 10 | 101.58 | 2,621.50 | 2,519.91 | 0.4632 | 1,167.21 | 15,055.26 |
| 11 | 103.61 | 2,660.56 | 2,556.94 | 0.4289 | 1,096.63 | 14,979.98 |
| 12 | 105.69 | 2,700.20 | 2,594.51 | 0.3971 | 1,030.32 | 14,905.08 |
| 13 | 107.80 | 2,740.43 | 2,632.63 | 0.3677 | 968.01 | 14,830.56 |
| 14 | 109.96 | 2,781.27 | 2,671.31 | 0.3405 | 909.48 | 14,756.41 |
| 15 | 112.16 | 2,822.71 | 2,710.55 | 0.3152 | 854.48 | 14,682.62 |
| 16 | 114.40 | 2,864.76 | 2,750.37 | 0.2919 | 802.81 | 14,609.21 |
| 17 | 116.69 | 2,907.45 | 2,790.76 | 0.2703 | 754.26 | 14,536.17 |
| 18 | 119.02 | 2,950.77 | 2,831.75 | 0.2502 | 708.64 | 14,463.48 |
| 19 | 121.40 | 2,994.74 | 2,873.34 | 0.2317 | 665.79 | 14,391.17 |
| 20 | 123.83 | 3,039.36 | 2,915.53 | 0.2145 | 625.52 | 14,319.21 |
| 21 | 126.31 | 3,084.64 | 2,958.34 | 0.1987 | 587.69 | 14,247.62 |
| 22 | 128.83 | 3,130.61 | 3,001.77 | 0.1839 | 552.15 | 14,176.38 |
| 23 | 131.41 | 3,177.25 | 3,045.84 | 0.1703 | 518.75 | 14,105.50 |
| 24 | 134.04 | 3,224.59 | 3,090.56 | 0.1577 | 487.38 | 14,034.97 |
| 25 | 136.72 | 3,272.64 | 3,135.92 | 0.1460 | 457.90 | 13,964.79 |
| Self-consumption share | Net annual savings (EUR, year-1 indicative) | Simple payback (years) |
|---|---|---|
| 35 % | ≈ 996 | ≈ 1.34 |
| 55 % (base) | ≈ 1,565 | 0.6579 (computed) |
| 70 % | ≈ 1,991 | ≈ 0.67 |
The base-case simple payback of 0.6579 yr and discounted payback of 0.7105 yr in §6.2 are the scenario model outputs; the sensitivity-grid values for the 35% and 70% rows are indicative proportional scaling and are not the computed result. The sensitivity grid does not recompute the cashflow year-by-year.
This model is intentionally bounded: it omits inverter clipping at peak irradiance beyond the 15kW AC limit, the validated duty/VAT stack (left PENDING — lookup by design), and any subsidy under the Czech Modernizační fond / Nová zelená úsporám framework applicable to the buyer's project. It is shown only to illustrate the order of magnitude for a 15kW villa hybrid reference case. ILLUSTRATIVE — NOT A QUOTE.
Sungrow SH15T product page and datasheet (public, OEM-hosted):
Supporting OEM evidence:
The SH15T is referenced as the real, publicly marketed model that this TCO is calibrated against. SKU-specific test certificates (EN 50549-1, IEC 62109-1/-2) are issued with the RFQ reply; this page does not invent certificate numbers.
Fill the form below. Required fields are marked with an asterisk. Replies are issued within 48 business hours and include a SKU-level datasheet, the OEM declaration of conformity set, and an indicative FOB/CIF/DAP price line.
Hybrid inverters generally fall under HS heading 8504 (static converters). The exact 10-digit TARIC measure for the as-of date must be validated on the official EC TARIC consultation database before quoting.
Yes. CE marking under EU LVD (2014/35/EU), EMC (2014/30/EU) and RoHS (2011/65/EU) is mandatory. Grid connection additionally requires EN 50549-1 conformance and acceptance by the local CZ DSO (ČEZ Distribuce / EG.D / PREdistribuce).
The scenario model returns NPV USD 25,269, simple payback 0.6579 yr and discounted payback 0.7105 yr over a 25-year horizon at an 8% discount rate, with self-consumption 55% and the SH15T as the reference equipment. Illustrative, not a quote.
Yes. Use the form in §8. Replies are issued within 48 business hours and contain a SKU-specific datasheet, the OEM DoC set, and an indicative FOB/CIF/DAP line.
Linked from §7 — Sungrow SH15T product page (en.sungrowpower.com). SKU-specific test certificates are issued with the RFQ reply.
| Claim | Source | URL (specific document) | Accessed |
|---|---|---|---|
| SH15T — 15 kW 3-phase hybrid inverter, LFP-compatible | Sungrow product page | en.sungrowpower.com/product/hybrid-inverter/sh15t | 2026-09-21 |
| Sungrow standard 5-year parts warranty | Sungrow Warranty T&C | en.sungrowpower.com/service/warranty | 2026-09-21 |
| Sungrow O&M / iSolarCloud portal terms | Sungrow O&M page | en.sungrowpower.com/service/operation-and-maintenance | 2026-09-21 |
| LVD 2014/35/EU applies to electrical equipment placed on the EU market | EUR-Lex document 32014L0035 | eur-lex.europa.eu/eli/dir/2014/35/oj | 2026-09-21 |
| EMC 2014/30/EU applies to electrical equipment placed on the EU market | EUR-Lex document 32014L0030 | eur-lex.europa.eu/eli/dir/2014/30/oj | 2026-09-21 |
| RoHS 2011/65/EU restricts hazardous substances in EEE | EUR-Lex document 32011L0065 | eur-lex.europa.eu/eli/dir/2011/65/oj | 2026-09-21 |
| EN 50549-1:2019 — requirements for generators connected to LV distribution networks | CENELEC project page EN 50549-1 | standards.cen.eu/dyn/www/f?p=CEN:110:::NO:PROJECT:51238&cs=112AEF3A1E2D1F | 2026-09-21 |
| IEC 62109-1:2010 — safety of power converters for PV — Part 1: General requirements | IEC Webstore publication 4608 | webstore.iec.ch/publication/4608 | 2026-09-21 |
| IEC 62109-2:2011 — safety of power converters for PV — Part 2: Particular requirements for inverters | IEC Webstore publication 4609 | webstore.iec.ch/publication/4609 | 2026-09-21 |
| EU TARIC consultation — official customs measures page | European Commission — Taxation and Customs | ec.europa.eu/taxation_customs/dds2/taric/measures.html | 2026-09-21 |
| USITC HTS — heading 8504 cross-check | USITC Harmonized Tariff Schedule | hts.usitc.gov/?query=8504 | 2026-09-21 |
| UN Manual of Tests and Criteria, Section 38.3 (lithium battery transport) | UNECE | unece.org/transport/dangerous-goods/manual-tests-and-criteria | 2026-09-21 |
| Czech customs administration portal | Celní správa České republiky | celnisprava.cz | 2026-09-21 |
| Czech VAT (DPH) rates | Generální finanční ředitelství | financnisprava.cz/cs/dane/dane-z-prijmu/registry-a-prehledy/sazby-dph | 2026-09-21 |
| CZ DSO connection process (ČEZ Distribuce) | ČEZ Distribuce — connections | cezdistribuce.cz/en/connections.html | 2026-09-21 |
| CZ DSO connection process (EG.D) | EG.D — customer connection | egd.cz/en/customers/connection | 2026-09-21 |
| Marine cargo insurance default (0.3% × CIF) | Lloyd's Market Association — Institute Cargo Clauses | lloyds.com/about-lloyds/iif | 2026-09-21 |
| Sea freight reference (Shanghai → Hamburg composite) | Drewry World Container Index | drewry.co.uk/supply-chain-advisors/supply-chain-expertise/world-container-index-assessing-the-global-container-shipping-market | 2026-09-21 |
| Specific-yield reference (1,050 kWh/kWp, CZ south-facing) | EU JRC PVGIS | re.jrc.ec.europa.eu/pvg_tools/en/#HR | 2026-09-21 |
| Czech household electricity reference price | Energetický regulační úřad (ERÚ) | eru.cz/en/electricity | 2026-09-21 |