In short. A generator hire is a working power supply delivered to your site, kept running, and taken away — not just a machine at a daily rate. The cheapest-looking quote often excludes transport, cables, distribution, an operator or the running hours you actually need, and gives no commitment on breakdowns. Compare suppliers on the total cost of the supply you need, and on what happens when something goes wrong.
Who this page is for: For project managers, purchase teams, event organisers and facility managers hiring a generator: compare suppliers on what you will actually receive and actually pay, not on the headline rate.
Key facts
- Billing basis matters most: an 8-hour shift rate, a monthly rate with an hour limit, and a 24-hour rate are not comparable until converted to the same running pattern.
- Ask what is included, not what is offered: transport both ways, loading, cables, panel, earthing, connection, operator, servicing, fuel.
- The breakdown clause is worth more than a small rate difference: response time, replacement set, and whether you pay for the days it was down.
- A firm with its own fleet and technicians controls availability and response; a broker depends on others.
- Record the set’s condition, fuel level and hour meter at delivery and at return.
What a complete rental quotation should state
| Item | Why it matters |
|---|---|
| Set rating and rating class (prime or standby), voltage, phases | A standby-rated set should not be run as your main supply for long hours |
| Make band or age band, enclosure type and noise level | Older or open sets may not meet site noise and emission rules |
| Billing basis: per shift, per day, per month, hour limit, extra-hour rate | Decides the real cost for your running pattern |
| Minimum hire period and notice to off-hire | Short jobs can be charged for a minimum period |
| Transport, loading and unloading, crane if needed — both ways | Often a large one-off cost |
| Cables (size, length), distribution board, changeover or ATS, earthing | A set without these is not a supply |
| Installation, connection and commissioning — by whom | Connection to a building must be done by competent, licensed people |
| Operator: included or not, shifts covered | Needed for some sites and long running hours |
| Fuel: who supplies, how measured at start and end | Avoids disputes and losses |
| Routine servicing during the hire (oil, filters at the maker’s hour interval) | Long hires run hundreds of hours a month |
| Breakdown response time, replacement set, rent-free days for downtime | The real measure of the supplier |
| Damage and insurance responsibility, security deposit | Who pays if the set is damaged or stolen on your site |
| Taxes, payment terms | Compare totals on the same basis |
Billing terms explained
- Shift rate: a rate for a fixed number of running hours per day, often 8. Hours beyond that are charged extra, usually pro-rata.
- Monthly rate with an hour limit: a fixed monthly charge covering up to a stated number of running hours; extra hours charged on top.
- 24-hour or unlimited rate: a higher rate with no running-hour limit — suits continuous supply.
- Metered hours: charged per running hour from the hour meter, sometimes with a minimum.
- Idle or standby days: some agreements charge a reduced rate when the set is on site but not running; others charge full rate.
- Mobilisation / demobilisation: the cost of getting the set to and from site, including transport and installation.
- Damage waiver: a charge that limits your liability for accidental damage — read what it excludes.
Worked comparison (illustrative)
Illustrative figures expressed as a rate index, not actual prices. A construction site needs a 125 kVA set for 3 months (90 days), running about 16 hours a day, with cables and a distribution panel.
| Item | Quote A | Quote B |
|---|---|---|
| Headline rate | 100 per day (8-hour shift) | 4,500 per month (24 hours, unlimited) |
| Looks like, per day | 100 | 150 |
| Extra hours (8 h/day beyond the shift) | Pro-rata: 8 extra hours × (100 ÷ 8 per hour) = +100 per day | Included |
| Cables and panel | +20 per day | Included |
| Transport each way | 300 each way | Included |
| Breakdown cover | “Best effort” | Replacement within a stated time; no rent for down days |
| Real cost per day at 16 hours | 220 | 150 |
| Total for 3 months | 20,400 | 13,500 |
Quote A looked a third cheaper per day. For this site’s running pattern it costs about 51 % more — and carries the breakdown risk. If the site ran only 8 hours a day with its own cables, Quote A could genuinely be cheaper. Always convert to your pattern.
The 25-point supplier checklist
The supplier
- Do they own the set, or are they sourcing it from someone else?
- Where is their nearest depot or service base, and how long to reach your site?
- Do they have their own technicians available after hours and on holidays?
- Is a spare set of the same size available for breakdown replacement?
- Can they show recent work of a similar size and type?
- Will they visit the site before quoting to check access, set position and cable route?
The set
- Is the rating prime (for long running) and right for your load including motor starting?
- What is its age band and running-hour history?
- Was it load-tested before dispatch, and will you get the test record?
- Is it in an acoustic enclosure that meets your site’s noise needs?
- Does it have a base fuel tank, and how many hours will it run per fill at your load?
- Is remote monitoring available for running status, alarms and fuel level?
The supply
- Are cables of the correct size and length included?
- Is a distribution panel or changeover/ATS included, and who connects it?
- Who does the earthing, and is an earth test record provided?
- Who commissions the supply and checks phase rotation before load is connected?
The terms
- What is the billing basis and hour limit, and what is the extra-hour rate?
- What is the minimum hire and the notice to off-hire?
- Are transport, loading and unloading included both ways?
- Who supplies fuel, and how is the level recorded at start and end?
- Who services the set during the hire, at what interval, and is it included?
- What is the breakdown response time, and are down days rent-free?
- Who is responsible for damage, theft and insurance?
- What deposit is required and how is it refunded?
- Are all charges in the total, including taxes?
Red flags
- A rate quoted with no billing basis or hour limit.
- “Cables and panel extra — as required” with no quantities.
- No commitment on breakdown response or replacement.
- Reluctance to state the set’s age, hours or test record.
- No mention of who connects the set to your installation.
Hand-over checklist (delivery and return)
| Item | At delivery | At return |
|---|---|---|
| Set serial number and rating | ||
| Hour meter reading | ||
| Fuel level (photograph gauge or dip) | ||
| Visible damage, dents, missing parts (photographs) | ||
| Battery present and condition | ||
| Cables: size, length, condition | ||
| Panel / ATS and keys | ||
| Earthing installed and tested | ||
| Phase rotation checked before load | ||
| Alarm test / emergency stop tested | ||
| Names and signatures of both parties |
Common mistakes
- Comparing daily rates without converting every quote to your real running hours.
- Accepting ‘cables and panel as required’ with no quantities or charges stated.
- Signing without a written breakdown response and replacement commitment.
- Skipping the hand-over record of hours, fuel level and condition.
What to send us
Send the load to be supplied (or the kVA you have in mind), the site location, the hire period and daily running hours, the cable distance to your panel, and whether you need an operator or fuel supply. Use the generator rental enquiry, or WhatsApp the details and photographs.
Questions hirers ask
What should be included in a generator rental quote?
The set rating and class, billing basis and hour limit, transport both ways, cables, panel or changeover, earthing, installation and commissioning, operator if needed, fuel responsibility, servicing during the hire, breakdown response and replacement, damage responsibility, deposit and taxes.
Is a daily rate or a monthly rate better?
It depends on how many hours a day you will run and for how long. Convert each quote to the same running pattern and period, including all extras, before comparing.
Who pays for fuel on a hired generator?
It varies by agreement. Many hires are ‘dry’, with the customer supplying fuel. Whatever is agreed, record the fuel level at delivery and return.
What happens if a rented generator breaks down?
That depends entirely on the agreement. A good agreement states the response time, the replacement arrangement and that you do not pay rent for days the set could not run. Get it in writing.
Do I need a licensed electrician to connect a rental generator?
Connecting a generator to a building’s installation should be done by competent, licensed people, with correct changeover arrangements so the set can never back-feed the utility supply.
Should I hire a bigger generator to be safe?
Hire for your measured load plus motor starting and a sensible margin. A set that runs far below its rating wastes fuel and can suffer from light-load running.
Related pages
- Rental & Temporary Power
- Generator Rental Rates
- Rental Cables
- Rental ATS
- Fuel Tank Rental
- Rent vs Buy
- Generator Rental Enquiry
- Generator Fuel Theft, Security and Refuelling Control
- Generator Rental for Apartments While the Society’s DG Set Is Under Repair
- Generator Rental for Bank and Insurance Branches
Technical content reviewed by D. Srinivas Reddy, Managing Partner and service engineer. Last updated 3 November 2026.