On a solar site, the machine question almost always gets asked too late. By the time the footing works start, the poles are already standing, the layout is fixed, and nothing on the ground can be knocked. That single fact decides more about which excavator belongs on site than soil type, budget or availability do.
What we see across Johor is the same pattern. The contractor books the biggest machine that is available and affordable, usually a 20-ton, on the reasoning that more power finishes faster. On open ground that reasoning holds. On a pole field it stops holding on day one.
Why a 20-Ton Stalls Once the Poles Are Standing
A 20-ton excavator is not short of digging force. What it is short of is room. Tail swing and track width decide whether it can turn where it stands or has to shunt back and forth to line up on the next position, and on a field of pre-set poles a machine that cannot turn in place spends its day repositioning. Even a short tail runs into this. One of our clients started their footing works on a 20-ton short tail and found it too big to move around the site, which is what brought us in.
The cost is not the machine rate. It is the installation crew standing behind the excavator waiting for footings to be ready.
Where the 12-Ton Fits
The 12-ton class sits in the gap that solar and light infrastructure work keeps landing in. It carries enough weight to work hard Johor laterite over a full shift and to handle concrete footings and materials, in a body that still travels the pole lines rather than fighting them. That is the machine we sent to the solar installation at Tanjung Langsat, and it is why the 12-ton has become one of the most requested classes on solar sites in Johor.
What a 12-ton cannot do is get inside every row once the poles are up. It can travel the lines. It cannot work its way into the tightest gaps between them.
When You Need a 3-Ton Mini As Well
That is the job of a 3-ton mini. A Kubota U30-6S is 1,550 mm across the tracks with a 790 mm tail swing radius, so it travels a pole row without anyone moving anything and turns in position without swinging into a pole behind it. Rubber tracks let it cross finished ground and access routes without chewing them up.
On the Tanjung Langsat job the two machines went in together and split the work by what each could reach: the mini on the digging, the 12-ton on carrying and setting the footings. Neither machine covers that job alone, and sending only the bigger one is how a programme quietly loses days.
Size the Machine by What It Has to Reach
On most earthwork jobs you size the machine by the ground. On a solar field with the poles already in, you size it by the gaps, then check that it still has the weight for the ground. Getting that order the wrong way round is the most common and most expensive mistake on these sites.
Every Green City Machinery rental comes with a CIDB / NIOSH / JPJ-licensed operator, full PPE compliance, and our own low loader fleet for transport. That means one point of contact for machine, operator and mobilisation instead of three, and machines that can be changed quickly when the first choice does not suit the site.
Our fleet covers 3-ton mini excavators, 12-ton, 20-ton, 30-ton and 40-ton excavators, long arm excavators, backhoes, lorry tippers and low loaders, with rock breaker, auger and ripper attachments available for excavator and backhoe work.
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