With fuel prices climbing and foreign exchange tight, more than 1.05 million tricycles already on Sri Lankan roads can move to an in-frame, drill-free conversion with a 3-year automotive-grade LiFePO4 system — adding LKR 45,000 net income per vehicle per month. No workshop re-tooling: technicians reuse the factory harness and the dedicated mounting cradle to replace the original two-stroke or four-stroke tank and exhaust directly.
verifiedNew A-grade automotive cells · drill-free original mounting points · 5 years / 3,500 cycles warranty · factory cell batch certificate with every shipment
Specification notice:Reference values only — batch and duty-cycle variation applies. Contact us for detailed specifications.
Every figure below comes from the working practices and fleet records of Colombo conversion workshops and taxi fleets, and can be verified against original bills and test reports on request.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
Built around how Colombo conversion workshops actually work, the TIANQIU cradle and sealing system is specified for Sri Lankan heat, humidity and rough roads — a 45-minute, fully in-frame swap.
This is not a generic lithium pack: it is a powertrain assembly specified for a grid that swings hard, mountain gradients that stay steep, and a coastal climate of heavy salt-laden humidity.
In suburban and rural Sri Lanka the grid is unstable — as low as 150V at the trough and occasionally 270V at the peak. The BMS and the matching on-board charger run a wide-range active PFC regulator stage, so undervoltage never overheats and surges never burn the board. Vehicles leave every morning on a full pack.
Built-in 4kV lightning / surge protectionThe central highlands around Kandy and Nuwara Eliya are steep and tight. High-rate automotive cells deliver 3C burst current for 30 seconds on a climb, while the BMS releases torque smoothly — eliminating the stall-and-roll-back risk of a loaded tricycle on a gradient.
150A continuous / 250A peakThe enclosure is cold-rolled high-strength galvanised steel with automotive electrophoretic coating, verified over 480 hours of neutral salt-spray testing. A double-lip silicone gasket and a Gore breather valve keep Colombo coastal flooding safe at 300mm wading depth with no leakage path.
IP67 · 1m immersion, no ingress| Configuration | Bajaj RE 2S dedicated | Bajaj RE 4S enhanced | TVS King Deluxe 72V | Piaggio Ape flagship |
|---|---|---|---|---|
| Market position | Largest installed base · two-stroke retirement | Volume recommendation · high-frequency taxi duty | High-power heavy duty · TVS King 200cc | Wide-body high-load platform · Piaggio Ape Auto DX |
| Nominal capacity / energy | 60V 100Ah (6.0 kWh) | 60V 120Ah (7.2 kWh) | 72V 100Ah (7.2 kWh) | 72V 120Ah (8.64 kWh) |
| Typical combined range | 100 – 110 km | 120 – 135 km | 130 – 145 km | 145 – 165 km |
| Cell chemistry | Automotive LiFePO4, A-grade | Automotive LiFePO4, A-grade | Automotive LiFePO4, A-grade | Automotive LiFePO4, A-grade |
| Cycle life at 25℃ | ≥ 3,500 (≥80%) | ≥ 3,500 (≥80%) | — | — |
| Charge / discharge capability | — | 3.5 h full charge at 20A | ≥ 22% gradient start | 3C burst / 1.5C continuous |
| Mounting and motor match | Original tank / engine bay, no cutting · 48 kg pack (30% lighter) | — | 4.5kW – 6.0kW PMSM | Piaggio factory chassis holes |
| Comms / thermal / ingress | — | CAN 2.0B / Bluetooth app | IP67 dual seal | Phase-change potting + heat spreader |
| Container loading | — | — | 180 kits / 20GP | 320 kits / 40HQ |
| Standard warranty | 5 years / 3,500 cycles | 5 years / 3,500 cycles | 5 years / 3,500 cycles | 5 years / 3,500 cycles |
Every platform above is calibrated on our passenger three-wheeler pack platform; the cradle geometry and weld-free installation sequence are documented in the retrofit guide. All parameters can be supplied as original third-party test reports.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
Sri Lankan operators are squeezed between volatile fuel prices and parts inflation. On typical field data, a TIANQIU 7.2kWh system cuts fuel spend by more than 82% per 100 km and retains over LKR 1,180,000 of pure operating cash for the owner across three years.
| Cost item | Petrol tricycle (2S / 4S) | TIANQIU lithium conversion |
|---|---|---|
| Daily energy consumed | ≈9.5 L of 92-octane petrol | ≈6.8 kWh of electricity |
| Daily power cost | LKR 3,610 (at 380 LKR/L) | LKR 544 (at 80 LKR/kWh) |
| Net daily power saving | —— baseline —— | LKR 3,066 / day |
| Monthly power cost (26 operating days) | LKR 93,860 / month | LKR 14,144 / month |
| Engine oil and air-filter servicing | LKR 8,500 / month | LKR 500 / month (no oil service) |
| Net monthly cash retained per vehicle | Marginal surplus | + LKR 45,000 – 79,000 |
Modelled on 2024/2025 price levels and a typical Colombo duty cycle of 90 km per day. The complete conversion kit pays back in 6.8 months (about 200 working days), and local Colombo finance partners can structure instalments.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
With foreign exchange tight and green transport prioritised, Sri Lanka grants meaningful tariff treatment to pure-electric conversion components. TIANQIU supplies the full document set so Class 9 dangerous goods clear without obstruction.
LiFePO4 motive packs are declared as a standalone line item. We guide buyers through the Ministry of Finance treatment for the “Clean Motive Power Retrofit” programme — duty and VAT exemption or reduction — assist with the Import License application, and issue a certificate of origin (CO) for preferential rates.
HS 8507.60.00 · duty and VAT relief guidanceWe supply the complete bilingual test report set for Sri Lanka Standards Institution SLS 1656, the UN38.3 test summary, the MSDS and the packing performance certificate — everything a local assembler or conversion workshop needs to complete the Department of Motor Traffic (DMT) licence change.
100% compliant with IMO DG Class 9 bookingAverage transit on the direct service is 12 to 16 days. Full containers ship as 20GP (180–220 packs) or 40HQ (320–380 packs), and dangerous-goods LCL consolidation is available through the Colombo bonded zone.
CIF Colombo / FOB terms available
For Sri Lankan conversion plants, fleet operators and importers, our powertrain engineers reply within 24 hours on working days with a complete package: vehicle-fit CAD dimensions, the SLS 1656 access checklist and a Colombo CIF cost model.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
Drawings, quantities and commercial details you submit stay strictly confidential. A mutual NDA can be signed first.
