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CASE
CASE

No Mains Power on Site: Running a Lift for 10 Hours

Short answer: will a battery powered scissor lift run ten hours?

A battery powered scissor lift on a 24 V 200 Ah pack will not cover a ten-hour shift on one charge in real site conditions. That is the realistic scissor lift shift runtime: six to seven hours of mixed driving and lifting when a 24 V 200 Ah scissor lift battery is healthy and the temperature is above 10°C. The remaining three hours have to come from a mid-shift top-up, a second battery set, or a different power strategy. Which of those three you pick depends on how the site is wired, and most sites have less capacity than the contractor assumes.

The real constraint is not battery capacity

People compare amp-hours and conclude the pack is too small. Usually the pack is fine. The constraint is that a scissor lift charging site shares its power with everything else drawing at the same time, and the charging point is wherever the extension lead happens to reach.

Three things go wrong, in this order:

  • The lead is too long and too thin. A 30 A charger on a 50 m coiled extension cable will not see 30 A. The charger derates, the charge takes longer, and nobody notices because the display still shows a charging symbol.
  • The generator is sized for the load, not the surge. A 24 V 30 A charger draws around 1.5 kW at the input during bulk charge. A 2 kW generator looks adequate and is not, once the compressor or a site tool starts on the same set.
  • The machine is charged at the end of the shift. By then the operator has gone home and the machine sits at 20% until morning, which is the worst possible state for a lead-acid pack.

What a shift actually costs in charge

Stuck on this step?

Send the site details — an engineer answers within one business day.

Take a GTJZ-1012 on a fit-out: 9.8 m platform, 320 kg, 24 V pack, charger 24 V 30 A. A typical day is not continuous lifting. It is 40 to 60 lifts, several hundred metres of travel, and long periods parked with the platform up while someone works.

Duty in one shiftRough share of packWhat it looks like on site
Travel, stowed, mixed15-20%Moving between work faces, loading bay to floor
Lifting and lowering25-30%40-60 full cycles on a 10 m unit
Parked at height, controls live10-15%The part everyone forgets: hours with the platform up
Cold, or battery over two years old+20-30%Same work, shorter day

That adds up to a pack that is doing well to finish eight hours, and a site that plans for ten.

Charging a scissor lift from a portable generator on a site with no mains power

A 1.5 kW charger input is not the same as a 1.5 kW generator. Start-up surge is what trips a small set.

Three workable options, in order of cost

Option one: mid-shift top-up. Bring the machine back at lunch and put it on charge for 60 to 90 minutes. This recovers enough for the afternoon on most sites and costs nothing except discipline. It also needs the charger to be somewhere the operator will actually walk to. If the charging point is 200 m away, this option does not exist in practice.

Option two: scissor lift generator charging, sized properly. Allow 2.5 times the charger input for the set, so around 4 kVA for a single 24 V 30 A charger, and keep the run from generator to charger under 20 m. Do not put site tools on the same set. This is the option most contractors choose, and the one that fails most often because the generator gets shared.

Option three: a second battery set. The cleanest answer for a ten-hour shift is two packs and a swap at mid-day. It is also the most expensive, and it only works if the machine was specified for it. Retrofitting a swap arrangement to a machine bought without one is not a job for the site.

Where this stops working

  • Three shifts. No battery arrangement covers 24 hours of continuous work without a dedicated charging room and a roster. If the site runs three shifts, use a different power source or accept a machine standing idle for part of the day.
  • Below 0°C. Charging a lead-acid pack below freezing damages it. The machine has to come into a heated space first, and that changes the site layout, not just the schedule.
  • No fixed charging location. If the machine charges wherever it stops, the pack will be chronically undercharged and will fail inside two years, usually just outside warranty.
  • Mixed fleet on one circuit. A single 32 A site circuit will carry two machines charging at once, not six. We have seen six units plugged into one distribution board and none of them finish charging.

How to size it before you order

Tell us three things: shift length, lifts per shift, and whether the site has a fixed 230 V supply or only a generator. With those we can say whether a battery powered scissor lift with a standard pack is enough, whether a second set is worth the money, or whether the honest answer is to hire in a diesel machine for the groundworks phase and bring the electric units in for the fit-out.

For higher work faces the same maths applies with a larger machine: the GTJZ-1214 carries the same charger rating but lifts more mass per cycle, so cycle count costs more. Details on the range page.

One detail from our own dispatch

We ship the charger with a 5 m lead, not the 10 m that customers sometimes ask for. The reason is the one above: a longer lead on a 30 A charger is the most common cause of a machine that "charges but never finishes". If the site needs more reach, the correct fix is to move the socket, not to extend the lead. Send your site power layout through the contact form and we will check it against the charger before delivery.

Same problem on your site?

Tell us the constraint you are stuck on — floor loading, doorway width, cold store, aisle width, charge window. We will tell you which model works, what it costs, and what we would refuse to sell you.

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Engineer reply within one business day (Mon–Sat, GMT+8).

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