Genset spare package content follows the hours the site will run, and a list built from a catalogue of every part misses the ones that fail. Read which parts fail first and how many to hold. Tesla Power builds the list from the service plan, so send the annual hours to our sales desk for a quotation.
- Ask for the list against the annual hours, because a package for a prime set differs from a standby one.
- Check the consumables separately, since filters and oil are a running cost and not a spares holding.
- Look at the long lead parts, because a sensor that takes ten weeks is the one that stops the set.
- Ask what the storage life is, because rubber and electronics age on a shelf as well as in service.
What belongs in a genset spare package?
A spare package holds three kinds of item: the consumables that every service replaces, the wear parts that fail within a known hour range and the capital parts that stop the set when they fail. The three have different logic and different budgets, and a package that mixes them into one list hides the part that matters. The consumables are predictable, the wear parts are scheduled and the capital parts are insurance.
The list also has to match the duty, because a standby set on two hundred hours a year wears differently from a prime set on four thousand. Tesla Power Equipment builds the list from the annual hours and the load profile rather than from a standard kit, because a standard kit carries two of everything and none of the item the site actually needs.
Which parts fail first on an export site?
The parts that fail first are the ones the site cannot buy locally: sensors, the regulator, the diodes in the rotating rectifier and the controller. Mechanical parts such as belts, hoses and filters can often be sourced from a distributor, and an electronic module usually cannot. A package weighted towards the mechanical parts is a package that covers what the site could already buy.
The second group is the parts that fail from the duty rather than from the hours, which on an export site means fuel system items and the water pump seal. A genset for a site with variable fuel quality uses filters faster than the manual predicts, and a genset in a hot climate uses hoses faster. the site power notes set out the duty inputs the list is built from.
| Group | What it holds | How it is sized |
|---|---|---|
| Consumables | Filters, oil, coolant | From the hours and the service interval |
| Wear parts | Belts, hoses, seals, thermostat | From the hour range in the manual |
| Electronic modules | Regulator, controller, sensors | One of each, by lead time |
| Rotating parts | Diodes, bearings, water pump | One set, by lead time |
| Capital parts | Alternator, injection pump | Not held, covered by a service agreement |
How many of each part should be held?
The count follows the number of times the part is expected to be replaced inside the cover period, and the cover period is usually the first two years, which Tesla Power sets from the service plan rather than from the calendar. A filter replaced at every service needs as many as there are services, and a regulator replaced once in ten years needs one. Holding two of a part that fails once a decade ties up money that the site could spend on the part that fails twice a year.
A 400kVA set at 0.8 pf carries 320kW, so 400kVA × 0.8 = 320kW; at 500 h a year the two year total is 1,000 h, and 1,000 ÷ 500 = 2 oil services, so the package needs two filter sets and about 120 L of oil. The same arithmetic applied to a prime set on four thousand hours gives eight services and a very different list, which is why the hours come first, and the 500kVA export set with the ATS option is quoted with the service interval it carries.
What does the consumable list look like?
The consumable list names each filter by part number and by the service it belongs to, so a storeman can issue the right one without reading the manual. It also states the quantity per service rather than the quantity per year, because the two are confused at the store and the confusion shows up as a shortage in the third service. The oil and the coolant belong on the same list with their specification rather than their brand.
The specification matters more than the brand on an export site, because the brand on the list may not be the brand in the port. A coolant named by its specification can be matched locally and a coolant named by its brand cannot. Tesla Power lists both and marks which of the two the warranty depends on, so the site knows where it has room and where it does not.
How is the package priced against downtime?
The package is priced against the hours a set is out of service, not against the parts bill, and the two figures are usually far apart. A regulator that costs little and takes ten weeks to arrive stops the set for ten weeks, and the cost of that outage is the number the package is really buying. A package judged on its parts total alone looks expensive and is cheap.
The comparison needs the lead time beside the price for every line, because a cheap part with a long lead is an expensive part. A genset for a site with no local distributor needs the lead time on the sheet more than it needs a discount, and the export product range states which frames share modules with common frames so a part can be borrowed.
Which records prove the list is sound?
Three records prove it: the service plan with its hour count, the list with a lead time against each line, and the storage conditions the site can actually provide. The first shows why each quantity was chosen, the second shows what the site would wait for and the third shows whether the parts will still be good when they are needed.
The storage record matters for rubber and for electronics, because a belt that has sat in the sun for two years fails sooner than one that has sat in a dark store. Yangzhou Tesla Power marks the shelf life on each line that has one, so the store can rotate the stock rather than discover the problem at the failure. A package without shelf lives is a package with an unknown half, and the maintenance intervals the list is built on follow the NFPA 110 annual load test.
What should the offer state about the parts?
The offer should state the cover period, the annual hours the list is built on, the lead time for each line and the shelf life where one applies. Those four lines let a buyer check the package against the site instead of against a catalogue. Most genset manufacturers quote a standard kit and leave the hours out, which is why two kits of the same price can differ by a year of cover.
Chinese genset suppliers who print the hours and the lead times make the comparison possible, and a genset for the first year of service shows the difference the first time a module has to be ordered. A genset in a market with a long customs delay needs the lead time figure more than any other line on the offer, and the duty class behind the hours follows the ISO 8528-1 power ratings.
What does the handover file carry for the package?
The handover file carries the service plan, the hour count, the list with lead times and the shelf lives, all on one sheet with the serial number of the set. A buyer who reads it can tell why each quantity was chosen and which line the site would wait for. Tesla Power issues that sheet with the set, so the store starts from a list with reasons rather than from a box of parts.
The file also carries the storage conditions the parts need, because a package stored in a hot shed ages faster than the shelf life assumes. Genset documentation for a spare package is only complete when the storage note appears beside the list, and the store that checks the conditions follows the works in Jiangsu routine.
Send the annual hours and the local supply situation with the enquiry, and the consumables, the modules and the lead times come back as one answer instead of a kit that has to be trimmed on site. Tesla Power writes that answer into the offer, so the cover is visible before the order rather than at the first shortage.
Frequently asked questions about genset spare package
It usually should not, because an alternator is a capital item and a second one costs more than the outage it prevents on most sites. A service agreement covers that case better. Ask what a replacement would cost against the premium before adding one.
Two years is the usual first cover, because the early failures show inside it and the parts are still current. A longer cover holds money in a store for parts the design may have changed. Review the list at the end of the period rather than extending it.
They do, and the packaging date matters more than the storage. A filter stored dry and dark holds for years and one stored in a humid shed does not. Mark the date on the box and use the oldest first.
It can when the specification is on the list rather than the brand, and it cannot when the warranty names a brand. Ask which lines the warranty covers before the order, and have them marked on the sheet.
The sensors and the small seals, because they cost little and are easy to leave off a list built on price. A sensor that stops the set is worth more than its price suggests. Check the list against the fault codes the controller can raise.
It does, because a prime set runs the hours that wear parts out and a standby set runs the hours that age them. The two lists share the consumables and differ on the wear parts. State the duty class before the list is built, and Tesla Power prices both.