The A&E 20KVA Relay Wall-Mounted Voltage Stabilizer (AERB45-W-20KVA) is an ultra-wide input, high-capacity central protection system. While most large-capacity stabilizers (20KVA and above) are floor-standing "desktop" units, this specific A&E model is unique for its wall-mountable design, allowing you to save floor space while protecting an entire building.
Available at Kara.com.ng, it is the ultimate "low-voltage" guardian, capable of pulling and stabilizing power from a near-dead 45V—a common occurrence in areas with severely overloaded transformers.
A&E 20KVA Relay 45V-270V Price in Nigeria (2026 Update)
Prices for the 20KVA Relay series have seen adjustments in 2026 due to the high cost of the massive copper transformer required to boost voltage from 45V to 220V.
| Model Variant | Input Range | Estimated Price (2026) |
| AERB45-W-20KVA (Wall Mount) | 45V – 280V | ₦650,000 – ₦780,500 |
| AERB45-D-20KVA (Desktop/Floor) | 45V – 280V | ₦550,250 – ₦620,000 |
| A&E 20KVA Servo (Precision) | 80V – 260V | ₦1,150,000 – ₦1,350,000 |
Selection Tip: If your goal is "survival" in an area where the light is so dim it barely glows, this 45V Relay model is your best bet. If you have extremely expensive Inverter ACs and your voltage is "decent" (90V+), the Servo model is the better (though more expensive) long-term investment for precision.
Key Specifications (AERB45-W-20KVA)
- Capacity: 20,000VA (20KVA) / Approx. 16,000W – 18,000W Max Load.
- Input Voltage Range: 45V – 280V AC (Extreme Wide Range).
- Output Voltage: 220V ± 10% (Standard Household Precision).
- Technology: High-Speed Relay Switching + 100% Pure Copper Coil.
- Display: Digital LCD showing Input Voltage, Output Voltage, and Load Level.
- Mounting: Reinforced Wall-Mount brackets (Designated by the "-W" in the model).
- Protection: Over-voltage (246V±4V), Under-voltage, Overload, and Short Circuit.
- Delay Feature: Selectable Short (3-5s) or Long (3-7min) delay for compressor protection.
Why the 20KVA Relay Model is a "Workhorse"
- Extreme Low Voltage Boost: It can take a 45V input (which is practically "dead" power) and step it up to 220V. This is a feat most servo stabilizers cannot achieve as they usually cut off at 80V.
- Instantaneous Response: Relay technology is faster than a motorized servo arm. When power "jumps" suddenly (common during rainstorms or when a neighbor switches off a heavy motor), the relay switches taps in milliseconds to shield your appliances.
- Centralized Protection: This unit is designed to be installed at your main change-over or Distribution Board (DB). One unit protects every bulb, socket, AC, and fridge in a large 4-5 bedroom duplex.
- Rugged Durability: The lack of a motorized servo arm means there are fewer mechanical parts to wear out or get "stuck" due to dust—a common issue in Nigeria's harmattan season.
What Can This 20KVA Stabilizer Power?
A 20KVA unit is massive. In a typical luxury residence, it can support:
- 4 to 6 Air Conditioners (Mix of 1.5HP and 2HP).
- 3 Large Deep Freezers + 2 Double-Door Fridges.
- 1.5HP Water Pumping Machine.
- Entire Home Entertainment: Multiple 75"+ OLED TVs, Sound Systems, and Servers.
- Washing Machine, Dishwasher, and Microwave.
Maintenance & Installation Tips
- Cable Requirements: For a 20KVA load, you must use a minimum of 16mm or 25mm Pure Copper cables. Using 10mm or aluminum-clad cables will result in fire risks due to the massive current flow.
- The "Clicking" Sound: Because this is a relay model, it will "click" loudly as it switches taps to adjust to voltage changes. This is normal, but it means you should avoid installing it directly inside a bedroom.
- Wall Security: This unit is heavy (approx. 40kg–50kg). Ensure it is mounted on a solid concrete wall using the provided expansion bolts; do not mount it on thin wooden partitions.
Would you like me to check the availability of 25mm Pure Copper cables for your installation, or do you need a 3-Phase 20KVA model if your property has a 3-phase meter?
