A 56kw generator is the towable diesel set that sits between the 45 and the 60 in most rental fleets, and at the standard 0.8 power factor it is a 70 kVA machine. It will carry a small site of hand tools, a temporary panel, task lighting and a welder or two, or one mid sized motor load with headroom for its starting surge. Fuel and the connection surprise people more than the rate does.
Size for the starting surge, not the running watts
Motors draw several times their running current for the second or two they take to spin up, so a compressor or a pump that runs happily at eight kilowatts can stall a set sized only for eight. Give the yard the largest motor on the job and how it starts, and let them confirm the machine covers the inrush.
Kilowatts and kVA are one machine, two numbers
Rental sets are labelled in both. Multiply kVA by 0.8 and you get the kilowatt figure, which is why 70 kVA and 56 kilowatts describe the same generator. Equipment nameplates use whichever their manufacturer preferred, so convert before comparing, and never assume the larger number means the larger machine.
What the fuel really adds over a week
A set this size burns somewhere near three to four gallons an hour at a working load, so a ten hour day is thirty five gallons and a five day week is close to two hundred. On board tanks commonly hold enough for a day or so. Decide early whether you refuel yourself or buy the yard's fuel service.
What the hire costs beside the fuel
A towable set this size commonly runs $400 to $700 a week, with a month near three weeks and a day rate that rarely makes sense outside an emergency. Delivery is billed each way. The distribution box, the cable and any fuel service are separate lines, so ask for a weekly figure with transport in it before comparing two yards.
Getting the power off the machine
Output comes on camlock connectors or a lugged panel, not a household socket, and it is usually configured for 208 volt three phase with a single phase option. That means a distribution box, cable rated for the run and a competent person to terminate and ground it. Book the spider box and cable with the set.
Questions people ask about 56kw generator
What will a 56 kilowatt generator run?
A small construction site comfortably: hand tools, a temporary lighting circuit, a couple of welders and a modest compressor. In a building it covers essential circuits rather than an entire service. Add the running loads first, then check the largest motor's starting draw against the machine's surge rating.
Is it towable behind a pickup?
A set this size on a trailer is heavy, and whether you may tow it depends on the trailer's rating and your vehicle rather than on the generator alone. Most yards deliver, and delivery is billed each way. Ask for the gross trailer weight before you assume a half ton pickup can move it.
Does it come with fuel?
Usually with a full or nearly full tank, with the same expected on return or a refuelling charge per gallon. On a hire longer than a couple of days someone has to refill it, and yards will quote a scheduled fuel service. Work out the burn for your hours before choosing which is cheaper.
Do I need an electrician to connect it?
For anything beyond plugging a tool into the set's own outlets, yes. Feeding a temporary panel or a building's circuits is licensed work, and grounding and bonding a portable generator is where amateur connections go wrong. The yard supplies the machine and the cable, not the connection.