Load-Shedding-Proof Print Production
National load shedding has paused, but local outages have not, and printers hate both
Protect the controlled shutdown before you try to run through an outage. A power cut mid-print costs you the print, the media, the ink and sometimes a printhead, and the surge when power is restored damages more electronics than the outage itself. A modest UPS on the control electronics and good surge protection solve most of the problem. Running a curing printer off backup power is a much bigger project.
Where the grid actually stands
National load shedding has been suspended for well over a year. Eskom passed a full year without load shedding in May 2026 and has continued through the 2026 winter without implementing it, with the winter outlook published in April 2026 projecting none for the period. Eskom's own medium-term adequacy work still flags a residual probability of load shedding during a winter peak if a large unit trips unexpectedly, so the risk is reduced rather than removed.
That is the national picture, and it is genuinely better news than the industry has had in years. It is not the whole picture for a print shop.
Municipal and local supply problems have not gone away. Eskom has continued running load reduction in areas where transformers are overloaded, typically during morning and evening peaks, and that is targeted at specific suburbs rather than rotated nationally. On top of that, print shops in industrial parks deal with cable theft, substation faults, transformer failures and planned municipal maintenance. None of those appear on a load shedding schedule and all of them do the same thing to a printer halfway through a job.
So the useful framing in 2026 is not load shedding specifically. It is power continuity.
What a power cut actually does to a printer
The damage is not usually dramatic, which is why it gets ignored until it is expensive.
The job is gone. A print interrupted at 80 percent is scrap. You lose the media, the ink and the time, and you still owe the customer the job.
Uncured ink. On a latex machine the curing stage is part of printing. Media sitting in the curing zone when power drops has partly cured ink on it, which means it is waste regardless.
Printheads left unparked. Printers park and cap their heads on a controlled shutdown to stop nozzles drying. A hard power loss can leave heads exposed. A short outage is usually survivable. A long one, particularly in a hot, dry Highveld workshop, is how a printhead dies.
The restoration surge. This is the one people underestimate. Power coming back is frequently harder on control electronics and power supplies than power going away. Good surge protection on the supply to your equipment is cheap insurance and should be the first thing you buy.
Warm-up time. Machines with heaters need time to come back to temperature, so the real cost of a two-hour outage is often three hours of production.
UPS, inverter or generator, and what each one protects
These are not interchangeable and they solve different problems.
Approach | Protects | Does not solve |
|---|---|---|
Surge protection | Control electronics against restoration spikes | Anything about the outage itself |
Small UPS on electronics | Safe controlled shutdown, head parking, RIP and server | Cannot run heaters or keep printing |
Inverter and battery | Lights, network, workstations, light finishing equipment | Sustained high loads such as curing heaters |
Generator | Full production, including heaters, if correctly sized | Costs, fuel, noise, maintenance, switchover quality |
Solar with storage | Daytime running of lower-draw equipment, bill reduction | Sizing for a production printer is a substantial project |
The order most shops should buy in is exactly that order: surge protection, then a UPS sized for safe shutdown and for your server and RIP, then wider backup only if the business case supports it.
The honest arithmetic on running a printer through an outage
Two very different load classes sit in a print shop.
Control electronics, workstations, the RIP machine, the network and the server draw modestly, and protecting them with a UPS is straightforward and affordable.
Drying and curing heaters are in a completely different class, and they are what makes latex and dye-sublimation machines power hungry. Sizing backup for those is not a plug-in UPS decision. It is an electrical project involving the machine's stated supply requirement, single or three phase, the switchover behaviour, and whether the supply is clean enough for sensitive electronics.
Do not guess this. Get the electrical specification for your exact model from the datasheet or from Midcomp, hand it to a qualified electrician or backup power supplier, and let them size it. A generator that cannot hold a stable supply under the heater load can do more harm than the outage.
Also check what your machine does on a transfer from mains to backup. A switchover with a gap that the printer notices is still an interruption, and a job still dies.
Protect the workflow, not only the printer
The printer is the visible risk. The invisible one is everything around it.
Your RIP machine, file server and network switches should be on a UPS. A RIP that loses a queue mid-spool can corrupt jobs and cost more time than the reprint. Cloud or off-site backup of job files matters, because a power event that takes a drive with it takes your reprint history too.
Point-of-sale, job management and quoting systems on a UPS keep the office working through a short outage, which means you are still taking orders while the machines are dark.
Scheduling is free and works
Not everything requires capital.
If your area has known load reduction windows, schedule long print runs outside them. Start long jobs early in the day rather than at the end of a shift where an interruption leaves half a job standing overnight. Break very long runs into panels so that an outage costs you one panel rather than an entire wall of wallpaper. Keep finishing work, which is usually lower draw and often manual, as the task you switch to when power is unstable.
Talk to your municipality or your industrial park management about planned maintenance schedules. Planned outages are announced, and shops that ask get told.
Write down the recovery routine before you need it
Most of the avoidable damage happens in the twenty minutes after power returns, when somebody is in a hurry.
Have a written routine and put it on the wall. Switch the machine off at its own switch during the outage rather than leaving it live waiting for power to return, so it does not take the restoration surge. Bring equipment back up in order, network and server first, then workstations, then the printer, so the machine finds the resources it expects. Let heated machines reach temperature and run their start-up checks before you send a job. Print a nozzle check before you print a customer job, not after.
Then deal with the interrupted job properly. Do not try to resume a partly printed panel and butt it to the rest. Reprint the panel. The join will show, and it will show on the wall or the vehicle rather than in your workshop.
Finally, inspect the media. Media that has been sitting under a curing heater when power dropped may be heat-damaged beyond the visible print area, and feeding that section into the next job wastes the next job too.
What to ask before you buy any machine
Put these four questions to any supplier, including us.
What is the exact electrical requirement, phase and current, for this configuration? What does the machine do on an uncontrolled power loss, and what is the recovery procedure? How long does it take to return to full production from cold? And what does the service plan say about damage caused by supply problems, because that answer varies and it is better known before you need it.
Midcomp can supply the electrical specification for any machine it sells so your electrician can size protection properly, and the technical team at the branches in Johannesburg, Cape Town and Durban deals with the recovery side often enough to be worth phoning on 010 020 9999 before you improvise.