At a virtual press conference witnessed by around 250 journalist from around the world, the Rocester-based manufacturer repeatedly emphasised its determination to follow the ‘road to zero’ with each new model clearly branded ‘100% electric; zero emissions’.
A direct equivalent of the existing diesel-powered 525-60 model, the new version has two electric motors – one for driveline, the other for lifting operations – powered by a 96-volt lithium-ion battery.
The 17kW drive motor provides tractive force to the axles through a permanent four-wheel drive dropbox. The second, 22kW, motor powers the hydraulic system via a fixed-displacement gear pump, providing up to 80 litres/min of flow.
The hydraulic system is completely new and, unlike that of the diesel-powered 525-60, flow is proportional to the position of the joystick and not to engine (or motor) rpm.
The hydraulic system also features ‘smart regeneration’ with power recovered during boom lowering and retraction fed back into the battery.
Similarly, the traction drive motor uses regenerative braking to top up the battery.
According to JCB’s chief innovation and growth officer, Tim Burnhope, the 525-60E has exactly the same performance characteristics of its diesel-powered predecessor, including a maximum lift capacity of 2,500kg and the ability to lift 2,000kg to the maximum 6m height.
The new machine offers “a zero emissions load-handling solution with no compromise in performance of productivity,” said Burnhope. Cycle times are similar to those of the diesel version but the new electric model is much quieter, he added.
Joining the new Loadall is JCB’s first all-electric site dumper, a one-tonne high-tip model designated the 1T-E. Described as the ideal partner for JCB’s 19C-1E electric mini-excavator, launched in 2018, this is essentially a battery-powered version of the diesel-powered 1T-2 model.
Power is supplied by two 5kWh lithium-ion batteries through a 7kW hydraulic motor. Instead of the individual hydrostatic wheel-motors of the 1T-2, the electric version uses conventional drive axles and a drop box to deliver full-time all-wheel drive.
A second hydraulic pump is used to power the machine’s standard hydraulic circuit for steering and skip-lift. The operator is protected with a standard roll-over protection (ROPS) frame and LED amber and green lap-belt beacons are fitted to ensure the operator is securely seated when working.
Again, performance and productivity are ‘identical’ to that of the diesel model, both in travel speed and tipping cycles. The maximum payload is 1,000kg and maximum load over height is 2,392mm.
JCB is at pains to stress that all the machines in the E-Tech range area capable of a full working shift on a single charge. All models in the E-Tech range are fitted with the same on-board charger, capable of recharging the battery in eight hours using a standard 240V, 16A supply.
To further reduce charging times, JCB has launched a new rapid universal charger, compatible with all existing and future E-Tech models with electrical systems from 48V to 96V.
Richard Brooks, engineering director for JCB’s materials-handling and access group, said the 525-60E Loadall can be fully-charged from zero to 100% in less than two hours and the battery is good for approximately 5,000 charging cycles.
The Universal Charger requires a standard 415V three-phase electrical supply and comes with both four- and five-pin connectors to suit all site power supplies throughout Europe.
Along with the 19C-1E mini-excavator, a 500kg-capacity walk-behind dumpster launched in September, a small scissor-lift, factory forklift and power-pack, the new dumper and Loadall E-Tech range now numbers seven machines. Burnhope says there’s “a lot more to come” and that customer response to the latest developments has been “incredible”.
The hire sector will be crucial to the take-up by end-users, says Burnhope: “customers will want to ‘try before they buy’ and that gives rental firms another outlet,” he commented.
While the focus of the launch was on electrically-powered machines, JCB also restated its intention to explore other alternatives to conventional fossil fuels.
In July, the company unveiled a prototype 20-tonne excavator, based on the existing 220X model, powered by a hydrogen fuel cell. “We’ve got to really experiment with alternative fuels, whether that’s clean-diesel, electric or hydrogen,” said Burnhope.
Hydrogen in particular has great potential in the construction equipment sector, where machines frequently have to operate on sites that have no mains electricity – a problem for battery-powered equipment. “Hydrogen can be delivered to site in bowsers, just like diesel,” said Burnhope, who added that JCB’s experiments with hydrogen fuel-cells have been driven personally by chairman Lord Bamford who is ‘“fixated on zero-emissions”, he said.