Equipment: Growatt MIN 10000TL-XH (3-phase on-grid string inverter) with PV array balance-of-system. Location: warehouse rooftop, Karachi region, Pakistan. Horizon: 25 years. Evidence date: 2026-09-22. Limitation: NPV / IRR / LCOE are COMPUTED model outputs for a single bounded scenario; duty/VAT rates are PENDING lookup on the official Pakistan FBR Pakistan Customs Tariff portal and are not part of the NPV.
Verdict (answer-first): Under the bounded inputs below, the 25-year NPV is USD 14,960.37 on a PV-of-costs base of USD 2,000.00; simple payback 1.42 years, discounted payback 1.58 years, IRR 0.7149, LCOE USD 0.0139/kWh. Not a quote.
| Metric | Value |
|---|---|
| Equipment (inverter-led) | Growatt MIN 10000TL-XH (10 kW, 3-phase, on-grid) |
| Location | Pakistan (warehouse rooftop) |
| Horizon | 25 years |
| Discount rate | 8.00 % |
| PV of costs (USD) | 2,000.00 |
| PV of benefits (USD) | 16,960.37 |
| NPV (USD) | 14,960.37 |
| IRR | 0.7149 |
| Simple payback (year) | 1.42 |
| Discounted payback (year) | 1.58 |
| LCOE (USD/kWh) | 0.0139 |
| Evidence date | 2026-09-22 |
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 25 |
| Discount rate | 8.00 % |
| Total undiscounted cost (USD) | 2,000.00 |
| Total discounted cost / PV of costs (USD) | 2,000.00 |
| Total undiscounted benefit (USD) | 42,035.31 |
| Total discounted benefit (USD) | 16,960.37 |
| NPV (USD) | 14,960.37 |
| IRR | 0.7149 |
| Simple payback (year) | 1.42 |
| Discounted payback (year) | 1.58 |
| LCOE (USD/kWh) | 0.0139 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 2,000.00 | 0.0000 | -2,000.00 | 1.00 | -2,000.00 | 0.0000 |
| 1 | 0.0000 | 1,400.00 | 1,400.00 | 0.9259 | 1,296.30 | 14,000.00 |
| 2 | 0.0000 | 1,420.86 | 1,420.86 | 0.8573 | 1,218.16 | 13,930.00 |
| 3 | 0.0000 | 1,442.03 | 1,442.03 | 0.7938 | 1,144.73 | 13,860.35 |
| 4 | 0.0000 | 1,463.52 | 1,463.52 | 0.7350 | 1,075.73 | 13,791.05 |
| 5 | 0.0000 | 1,485.32 | 1,485.32 | 0.6806 | 1,010.89 | 13,722.09 |
| 6 | 0.0000 | 1,507.45 | 1,507.45 | 0.6302 | 949.95 | 13,653.48 |
| 7 | 0.0000 | 1,529.92 | 1,529.92 | 0.5835 | 892.69 | 13,585.22 |
| 8 | 0.0000 | 1,552.71 | 1,552.71 | 0.5403 | 838.88 | 13,517.29 |
| 9 | 0.0000 | 1,575.85 | 1,575.85 | 0.5002 | 788.32 | 13,449.70 |
| 10 | 0.0000 | 1,599.33 | 1,599.33 | 0.4632 | 740.80 | 13,382.45 |
| 11 | 0.0000 | 1,623.16 | 1,623.16 | 0.4289 | 696.14 | 13,315.54 |
| 12 | 0.0000 | 1,647.34 | 1,647.34 | 0.3971 | 654.18 | 13,248.96 |
| 13 | 0.0000 | 1,671.89 | 1,671.89 | 0.3677 | 614.75 | 13,182.72 |
| 14 | 0.0000 | 1,696.80 | 1,696.80 | 0.3405 | 577.69 | 13,116.81 |
| 15 | 0.0000 | 1,722.08 | 1,722.08 | 0.3152 | 542.87 | 13,051.22 |
| 16 | 0.0000 | 1,747.74 | 1,747.74 | 0.2919 | 510.15 | 12,985.97 |
| 17 | 0.0000 | 1,773.78 | 1,773.78 | 0.2703 | 479.40 | 12,921.04 |
| 18 | 0.0000 | 1,800.21 | 1,800.21 | 0.2502 | 450.50 | 12,856.43 |
| 19 | 0.0000 | 1,827.03 | 1,827.03 | 0.2317 | 423.35 | 12,792.15 |
| 20 | 0.0000 | 1,854.26 | 1,854.26 | 0.2145 | 397.83 | 12,728.19 |
| 21 | 0.0000 | 1,881.89 | 1,881.89 | 0.1987 | 373.85 | 12,664.55 |
| 22 | 0.0000 | 1,909.93 | 1,909.93 | 0.1839 | 351.31 | 12,601.22 |
| 23 | 0.0000 | 1,938.38 | 1,938.38 | 0.1703 | 330.14 | 12,538.22 |
| 24 | 0.0000 | 1,967.26 | 1,967.26 | 0.1577 | 310.24 | 12,475.53 |
| 25 | 0.0000 | 1,996.58 | 1,996.58 | 0.1460 | 291.54 | 12,413.15 |
| Line item | Specification / scope | Unit | Qty | Source basis |
|---|---|---|---|---|
| On-grid string inverter | Growatt MIN 10000TL-XH, 10 kW, 3-phase, IP65; OEM manual title/revision to be confirmed per RFQ | pcs | 1 | Growatt product index (specific MIN 10000TL-XH datasheet/parameters PDF requested per RFQ) |
| DC isolator (inverter-side) | 1000 V DC, 32 A | pcs | 1 | OEM accessory list (per RFQ) |
| AC isolator | Per local grid-code | pcs | 1 | OEM accessory list (per RFQ) |
| Surge protection (DC + AC) | Type II SPD | pcs | 2 | OEM accessory list (per RFQ) |
| Smart monitoring module | Wi-Fi / Ethernet (Growatt Shine series family; model confirmed at RFQ) | pcs | 1 | Growatt product index |
| AC cable + DC cable set | PV-rated, with MC4 | lot | 1 | OEM accessory list (per RFQ) |
| Sea freight CN → Karachi (indicative) | 1 × inverter carton, LCL | shipment | 1 | Freight forwarder quote (per RFQ) |
| Customs clearance & inland transport | Karachi → warehouse site | lot | 1 | Clearing agent quote (per RFQ) |
| Cost driver | Assumption | Source basis |
|---|---|---|
| Preventive maintenance | 1 visit / year, visual + firmware check (OEM service-manual revision confirmed at RFQ) | Growatt product index (manual revision per RFQ) |
| Spare-parts reserve | Surge modules, fans | OEM accessory list (per RFQ) |
| Monitoring subscription | Optional cloud portal | Growatt product index |
| Insurance allocation | ~0.5 % of asset value / year (indicative) | Local broker quote (per RFQ) |
The draft did not state the following inputs. The scenario model used these bounded defaults; any change to them changes NPV / IRR / payback / LCOE. They are presented here as explicit assumptions, not as sourced facts.
| Standard / scheme | Scope | Status | Document / lookup URL |
|---|---|---|---|
| IEC 62109-1:2010 / IEC 62109-2:2011 | Safety of power converters for PV | Certificate number & issuing NB to be supplied per OEM at RFQ | IEC Webstore catalogue (cite full designation IEC 62109-1:2010 and IEC 62109-2:2011 in the OEM certificate) |
| IEC 61727 / IEEE 1547 or local grid code | Grid interconnection | Certificate number & issuer to be supplied per OEM at RFQ | IEC Webstore catalogue |
| CE / equivalent attestation | EU conformity attestation by accredited body | Certificate number & notified-body ID to be supplied per OEM at RFQ | EU TARIC consultation (for HS / duty cross-check on EU import leg, not Pakistan) |
| UN 38.3 (UN Manual of Tests and Criteria, ST/SG/AC.10/11/Rev.7) | Lithium-battery transport classification (only if battery storage is later added) | Test summary to be supplied per OEM at RFQ | UN Manual of Tests and Criteria page |
| HS national line | Program | Lookup path |
|---|---|---|
| Heading 8504 (electrical transformers, static converters and inductors) — exact national line TBC on FBR | Customs Duty (CD) | PENDING — lookup on Pakistan FBR Pakistan Customs Tariff portal (FBR home: fbr.gov.pk; deep tariff pages move frequently — confirm exact national line at RFQ) |
| Same heading as above | Additional Customs Duty (ACD) | PENDING — lookup on Pakistan FBR Pakistan Customs Tariff portal |
| Same heading as above | Regulatory Duty (RD) | PENDING — lookup on Pakistan FBR Pakistan Customs Tariff portal |
| Same heading as above | Sales Tax (FED/ST) | PENDING — lookup on Pakistan FBR Sales Tax portal |
| Same heading as above | Advance Tax / Withholding on imports | PENDING — lookup on Pakistan FBR Income Tax portal |
RFQ fields to prepare: product_sku (e.g. ONGRID-INV-10KW), qty + unit (e.g. 50 pcs), Incoterm (FOB / CIF Karachi / DAP), target_cert (IEC 62109, CE, grid-code), destination_country (Pakistan), buyer_email, buyer_company.
Inverters commonly fall under Chapter 85 of the Pakistan Customs Tariff, frequently under heading 8504 (electrical transformers, static converters and inductors). The exact national line and the applicable CD / ACD / RD / ST / advance-tax / WHT rates are PENDING — lookup on the official Pakistan FBR Pakistan Customs Tariff portal before any quotation is issued.
At minimum, require the OEM's IEC 62109-1:2010 / IEC 62109-2:2011 attestation (safety of power converters for PV; catalogue at IEC Webstore), IEC 61727 / IEEE 1547 or local grid-code compliance evidence, and a CE or equivalent attestation from an accredited body. Exact certificate numbers, issuing body, and validity dates must be supplied per OEM at RFQ.
No. The TCO summary, year-by-year cash flow, NPV (USD 14,960.37), IRR (0.7149), simple payback (1.42 years), discounted payback (1.58 years) and LCOE (USD 0.0139/kWh) are COMPUTED model outputs for the bounded assumptions listed in Section 6. They are not a quotation from Tradvolt, Growatt, or any freight forwarder / clearing agent. They exclude Pakistan duty / VAT, which is PENDING lookup.
Product SKU, quantity and unit, Incoterm (e.g., FOB Shanghai, CIF Karachi per ICC Incoterms 2020), target certifications, destination country, buyer email and buyer company.
Scope is project-dependent. Tradvolt can coordinate with local EPC partners; final scope is confirmed only on a per-RFQ basis.
Yes — Tradvolt works with multiple OEM factories (among them the landing pages for Sungrow, Huawei FusionSolar, Growatt, LONGi, JinkoSolar, Trina Solar, CATL ESS, and EVE Energy); brand selection is finalized after RFQ review against your certification, budget and lead-time requirements. This page is modelled on Growatt MIN 10000TL-XH only.
IEC standards: IEC Webstore catalogue (cite full designation + edition in the OEM certificate). UL 61730-1 (PV module safety): UL 61730-1 standard page. UL 1973 (stationary / motive auxiliary batteries, if storage is added): UL 1973 standard page. IEC 61851-1 (EV conductive charging, if an EVSE leg is added): IEC 61851-1:2017 page. UN transport tests for lithium cells: UN Manual of Tests and Criteria page (ST/SG/AC.10/11/Rev.7, UN 38.3). EU Battery Regulation: Regulation (EU) 2023/1542.
Disclaimer: All TCO figures are COMPUTED model outputs for a single bounded scenario (Growatt MIN 10000TL-XH, 25-year horizon, 8.00 % discount rate, USD 2,000.00 capex, assumptions in Section 6) and exclude Pakistan duty / VAT (PENDING — lookup on the official FBR Pakistan Customs Tariff portal). No OEM logos, "No.1" rankings, or third-party aggregator ratings are used. Tradvolt is a B2B sourcing partner and does not issue customs or tax advice; consult a licensed clearing agent and the official FBR portal for binding duty/tax computation.