You think it is the equipment. It is probably the supply.

Every Kenyan business that buys serious equipment eventually hits the same pattern. A motor burns out. A board dies. A UPS battery is flat after eighteen months when it was rated for five years. The technician comes, replaces the part, and within a few months the same thing happens again. The OEM blames the local "electrical environment." The accountant pays the invoice. The pattern continues.

The thing that nobody flags, because nobody gets paid to flag it, is that the equipment is not the problem. The voltage feeding the equipment is the problem. Kenya Power delivers a supply that swings between 200 V and 260 V across the day in Nairobi, and bottoms out at 170 V upcountry. Almost no imported equipment is designed for that band. They burn out one component at a time, then they fail.

This article is the symptom map. If any of these patterns describe your site, you are very likely looking at a voltage problem you have not diagnosed.

Symptom 1: Motors and compressors that burn out before their time

A 10 kW industrial motor should run for fifteen years. If yours is dying at three or four, the supply is the most likely cause. Here is the mechanism: a 10% undervoltage forces the motor to draw roughly 15% more current to deliver the same mechanical power. That extra current heats the windings. Heat degrades the insulation. After enough months of running below nominal, the insulation fails, the windings short, and the motor is gone.

Compressors fail first within this category because they have the least margin. If your compressor head is rebuilt or replaced more than once every three years, look at the supply.

Symptom 2: Electronic boards and PLCs that "just die"

Sensitive electronics do not gently degrade. They either work or they do not. A spike from a Kenya Power switching event passes through the equipment power supply, takes out a capacitor, and the board is dead. The technician replaces the board. Next event, same outcome.

If your CNC controller, your weighing scale, your card reader, or your variable-speed drive has needed two or more board replacements in the last two years, you have a power quality problem upstream of the equipment.

Symptom 3: UPS batteries that die in 18 months instead of 5 years

A UPS battery has a rated life of 4 to 6 years if the UPS sits idle most of the time. In Kenya we routinely see them dead at 12 to 18 months. The reason is that the UPS interprets every voltage swing as a fault, switches to inverter mode to ride it out, and discharges the battery slightly each time. Tens of thousands of micro-discharges later, the battery has lost its capacity and gives you ninety seconds when you need eight minutes.

If your IT support contract has a quarterly battery line item, you are paying for a UPS that is being used as a stabilizer.

Symptom 4: LED bulbs and ballasts on a fast replacement cycle

LEDs are surprisingly fragile. Their drivers are rated for a narrow band of input voltage. A supply that runs from 200 V to 260 V across an afternoon hammers the driver electronics. Manufacturers quote 50,000 hour lifespans on stable supply. On Kenyan supply, six or seven thousand hours is closer to reality.

If you are replacing LED tubes or ballasts on a 12 to 24 month cycle when they are sold as 5 to 10 year products, it is the supply.

Symptom 5: Equipment that trips when the neighbour's machine starts

You hear the welder fire up next door. Your lights dim. Your computer reboots. Your compressor trips. This is the classic shared-transformer voltage sag. The neighbour's load drags the local transformer voltage down for as long as their machine is running. Your equipment sees 195 V instead of 230 V and the protection circuits decide it is unsafe to keep operating.

If you can predict your trips by listening for someone else's equipment, you have a phase-imbalance or feeder-loading problem that an AVR will solve.

Symptom 6: Servers, NVRs and IT equipment that reboot for no reason

Servers crash randomly. The NVR loses recordings for a five-minute window once or twice a week. The router resets itself in the middle of the day. Each event is too short to register on a power monitor but long enough to disrupt anything that needs continuous power.

These are micro-outages or deep voltage dips, lasting fractions of a second. They do not show up on your bill, the lights might not even flicker, but anything with a sensitive power supply notices.

Symptom 7: Equipment warranties being voided over "site supply"

This one stings the most. Expensive medical, lab, or production equipment is shipped from Europe or Asia with a warranty that explicitly requires "stable mains supply within ±6%" or similar. A board fails. The OEM comes out, looks at the install, asks what the supply looks like, and walks back to the airport without honouring the warranty. The equipment is yours to fix.

If you have ever had an OEM service engineer point at the supply as the get-out, you knew you had a power quality problem at that moment. You have it whether or not anyone says so out loud.

What it costs you

A mid-size Kenyan factory that ignores power quality typically experiences:

Two to four equipment failures per year tied to voltage events
Battery replacement cycles two to three times shorter than rated
Unplanned downtime measured in days per year
Warranty disputes with at least one OEM
Steady degradation of any sensitive equipment, with sudden failures clustering around the rainy season and the dry-season peak load

The replacement cost of motors, boards, batteries and drivers alone usually pays for an AVR within the first year. Everything after that is profit.

What the standard fix looks like

A correctly-sized servo AVR sits between the incoming Kenya Power supply and the main distribution board. It corrects the voltage in roughly 10 milliseconds. Your equipment sees a steady 230 V (or 415 V three-phase) regardless of what the grid is doing. Most installations are an overnight planned shutdown to commission. The unit then sits in the corner of the substation room, regulating quietly, for fifteen years.

For sites that also need ride-through during outages, the AVR pairs with a UPS. The AVR keeps the supply clean, the UPS keeps the equipment running through outages, and battery life goes back to rated figures. That comparison is in AVR vs UPS.

For sizing, see the AVR sizing guide or use the sizing tool. For the underlying causes of the voltage swings themselves, see Why Kenya Power fluctuates.

If three or more of the symptoms in this article describe your site, book a free site visit within Nairobi. Bring nothing but your maintenance log. We will walk the supply with you and give you a one-page assessment of what is failing and why.

Why Your Equipment Keeps Failing: The Voltage Problem Most Kenyan Businesses Miss