Introduction: Construction-site generator procurement becomes faster when the supplier can translate site access, tool load, voltage and phase, open-frame structure, and sea freight packaging into one written configuration.
A subcontractor mobilizing a site before the grid arrives needs a supplier that can turn load, voltage, and sea freight into one workable order. The job is familiar: a new road section, camp, or plant extension has broken ground, the utility connection is months away, and crews still need power for drills, grinders, temporary lighting, and radio or monitoring equipment. Ten to twenty open-frame units will do it, but three suppliers return catalogs that look almost identical and prices that are hard to compare line by line. The useful question is which supplier can take site conditions, convert them into a fixed configuration, pack the sets for a sea container, and answer engineering questions before money moves. Start with the site, then build an RFQ that makes each reply comparable.
The first factor is how the unit reaches the work face. A yard with a forklift and concrete pad is a different order from a gravel spur where the set is dragged by hand or loaded onto a pickup every morning. Ask how the frame is lifted, how wide the footprint is, and whether the unit has wheels or sits on a fixed base. Open-frame sets with tubular steel frames, frame structure, and cushioned feet suit sites where the unit stays in place and is fenced or attended; sites that move the set daily need a wheeled arrangement. A mismatch shows up as bent frames and cracked fuel fittings weeks into the job, not on the quotation. The load mix decides the electrical specification. Handheld power tools draw a heavy inrush for a fraction of a second, lighting draws a modest but constant load, and site communication or monitoring gear is sensitive to voltage swings. Where a crew runs 110V tools alongside 230V equipment, multi-voltage output can keep the site on one fleet. Where mixers, hoists, or compressors are three-phase, the order must specify three-phase output from the start because phase configuration is set at the winding and control panel stage. Copper windings and a voltage regulation device carry that inrush and keep tool performance steady through the shift, which is why experienced site engineers ask about winding material before price. Heat, dust, and shift length complete the picture. Air-cooled four-stroke engines rely on airflow, so placement matters: shade, clearance from spoil piles, and no boxing in against a wall. A 9L tank covers roughly eight hours and a 15L tank around nine, which lines up with a working shift and sets a refueling routine. These open-frame machines are built for outdoor temporary power, so site them away from occupied cabins and doorways and keep ventilation clear.
A price-only RFQ produces quotes you cannot compare because each supplier quietly assumes a different tank size, start method, phase configuration, and packaging standard. Write the order as a specification plus a shipping brief so every reply describes the same machine. Start with the destination: country, nearest container port, and local voltage and frequency. This removes many later surprises because a 60Hz site cannot be served by a set configured only for 50Hz, and a 110V tool mix needs different output from a 230V one. Add the quantity and any mix of variants, since a project order of ten to twenty units often combines two or three configurations. Then describe the machine as the site will use it. State voltage and phase for each variant; choose electric start for manual daily operation or auto start for remote communication and monitoring loads; and match tank size to shift length. Name the structure as open frame so no one replies with an enclosed canopy unit you did not request. List the tools and equipment behind the load, note hard-starting items, and add site notes on access, climate, and whether the set is fixed or moved. Finish with the commercial brief: customized packaging needs, destination port, preferred Incoterm, any documents your market requires, and the delivery window you are planning around. The confirmed minimum order for this range is 10 PCS, which fits a typical project batch. Shipping terms need their own line because FOB and CIF place freight booking, insurance, and risk transfer in different hands. Ask each supplier to state which Incoterm the price uses and what it covers. Lead time, sailing schedule, and the documentation package for your market come back with the formal quotation, so treat those as quotation items rather than pre-qualification questions.
The practical distinction is between a diesel generator manufacturer with its own plant and a reseller assembling units from other suppliers' catalogs. That difference shows in how fast a supplier answers a technical question in writing: a factory can confirm a winding, tank, or control configuration against its own build sheet, while a reseller has to ask the factory and relay the answer. Tianfa Generator runs production in Shanxi and a separate export company in Tianjin. It has shipped open-frame and portable units to Africa, Kazakhstan, and the Middle East, so configuration questions reach people who build the machine.
When you send an RFQ, expect the reply to echo your requirements as a line-by-line specification: voltage, phase, frequency, start method, tank capacity, frame type, quantity per variant, and packaging instruction, each with the supplier's confirmation beside it. A vague “yes, we can customize” leaves too much open. For a construction order, that written line-up becomes the reference document your site team and customs broker both work from, and it gives you a sound basis for comparing suppliers that quoted different assumptions at different prices.
Open-frame units travel with the engine, fuel tank fittings, and control panel exposed, so packaging is an engineering item rather than a cardboard afterthought. Ask how the frame is braced, how the panel and loose parts are protected, and how many units fit per container under that packing method. The loading plan drives freight cost per set as much as the unit price does. Customized packaging is available for this range, and the supplier should describe the bracing and loading arrangement before you commit. Terms, certification documents, and the delivery schedule for your market are confirmed at quotation.
The shortlist that matters on a construction project is built from site conditions upward: how the unit moves, what the tools draw, how long the shift runs, and how the set is packed for a sea container. Write those answers into the RFQ as a specification plus a shipping brief, then judge suppliers by whether they return a written configuration with their price. Tianfa Generator builds open-frame portable sets from 1.5kW to 20kW with 110V, 220V, and 230V output, single- or three-phase options, electric or auto start, 9L or 15L tanks, and a 10 PCS minimum order with customized packaging and OEM/ODM support. Send your site load, phase, quantity, and destination port to request a configuration and quotation you can compare.
A: Send the destination country and port, local voltage and frequency, quantity plus any mix of variants, and the voltage and phase required for each one. Add the start method, tank size, open-frame structure, and a list of tools and equipment behind the load with notes on hard-starting items. Finish with site access and climate notes, packaging requirements, preferred Incoterm, and the delivery window you are planning around.
A: Open-frame units ship with the engine, tank fittings, and control panel exposed, so the packing method affects both damage risk and how many sets fit in a container. Braced frames and protected panels reduce transit damage and rework at destination, while a tighter loading plan lowers freight cost per unit. Ask the supplier to describe the bracing and loading arrangement before you place a deposit.
A: Yes. The portable open-frame range supports 110V, 220V, and 230V output with single-phase or three-phase options, and customization is handled at the winding and control panel stage. State the voltage and phase for each variant in the RFQ so the supplier confirms the exact build, because phase changes affect the winding and control panel, not only documents. OEM/ODM support covers packaging and labeling alongside the electrical configuration.
Incoterms 2020 | International Chamber of Commerce
