Power Inverter, Choosing the right Capacity in Nigeria – View Prices

Power Inverter, Choosing the right Capacity in Nigeria – View Prices below

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Some basics

There many types, sizes, brands, and models of inverters. Choosing which one is best from such a long list can be a chore. There is no “best” inverter for all purposes – what might be great for an ambulance would not be suited for an RV.

Power output is usually the main factor, but there are many others.
But there are many factors that go into selecting the best inverter (and options) for your application, especially when you get into the higher power ranges (800 watts or more).
Lets get through some basics

Watts – Are basically just a measure of how much power a device uses when turned on, or can supply. If a something uses 100 watts, that is simply the voltage times the amps. If it draws 10 amps at 12 volts, or 1 amp at 120 volts, it is still 120 watts.
Watt-hour (or kilowatt hour, kWh) is simply how many watts times how many hours that is used for. This is what most people mean when they say “watts per day”. If a light uses 100 watts, and it is on for 9 hours, that is 900 watt-hours. If a microwave uses 1500 watts, and runs for 10 minutes, that is 1/6th of an hour x 1500, or 250 WH. When you buy power from your friendly utility (look at your last bill), they sell it to you at so much per kWh. A kWh is a “kilowatt hour”, or 1000 watts for one hour (or 1 watt for 1000 hours).
Amp- is a measure of electrical current at the moment. (Amps do not come in “amps per hour” or “amps per day” either). Amps are important because it determines what wire size you need, especially on the DC (low voltage) side of an inverter. All wire has resistance, and amps flowing through a wire makes heat. If your wire is too small for the amps, you get hot wires. You can also get voltage drops in the wire if it is too small. This is not usually a good thing. An amp is defined as 1 Coulomb per second.
Amp-hours (usually abbreviated as AH) are what most people mean when they say “amps per hour” etc. Amps x time = AH. AH are very important, as it is the main measure of battery capacity. Since most inverters run from batteries, the AH capacity determines how long you can run.

Peak Versus Typical

An inverter needs to supply two needs – Peak, or surge power, and the typical or usual power.
o Surge is the maximum power that the inverter can supply, usually for only a short time – a few seconds up to 15 minutes or so. Some appliances, particularly those with electric motors, need a much higher startup surge than they do when running. Pumps are the most common example – another common one is refrigerators (compressors).

o Typical is what the inverter has to supply on a steady basis. This is the continuous rating. This is usually much lower than the surge. For example, this would be what a refrigerator pulls after the first few seconds it takes for the motor to start up, or what it takes to run the microwave – or what all loads combined will total up to.
• Average power would usually be much less than typical or surge, and is not usually a factor in choosing an inverter. If you run a pump for 20 minutes and a small TV for 20 minutes during a one hour period, the average might be only 300 watts, even though the pump requires 2000. Average power is only useful in estimating battery capacity needed. Inverters must be sized for the maximum peak load, and for the typical continuous load.

Power Ratings of inverters

Inverters come in size ratings all the way from 50 watts up to 50,000 watts, although units larger than 11,000 watts are very seldom used in household or other PV systems. The first thing you have to know about your inverter is what will be the maximum surge, and for how long

Surge: All inverters have a continuous rating and a surge rating. The surge rating is usually specified at so many watts for so many seconds. This means that the inverter will handle an overload of that many watts for a short period of time. This surge capacity will vary considerably between inverters, and different types of inverters, and even within the same brand. It may range from as little as 20% to as much s 300%. Generally, a 3 to 15 second surge rating is enough to cover 99% of all appliances – the motor in a pump may actually surge for only 1/2 second or so.

o General Rules: The inverters with the lowest surge ratings are the high speed electronic switching type (the most common). These are typically from 25% to 50% maximum overload. Surge ratings on these can range up to 300% for short periods. While high frequency switching allows a much smaller and lighter unit, due to the much smaller transformers used it also reduces the surge or peak capacity.

Pros and Cons: Although the high frequency switching type don’t have the surge capacity of the transformer based, they do have some definite advantages. They are much lighter, usually quite a bit smaller, and (especially in the lower power ranges) they are much cheaper. However, if you are going to run something like a submersible well pump, you will need either very high surge capacity or you will need to oversize the inverter above it’s typical usage, so that even at maximum surge the inverter will not exceed it’s surge rating.

There are 3 major types of inverters

Sine Wave
A sine wave is what you get from your local utility company and (usually) from a generator. This is because it is generated by rotating AC machinery and sine waves are a natural product of rotating AC machinery. The major advantage of a sine wave inverter is that all of the equipment which is sold on the market is designed for a sine wave. This guarantees that the equipment will work to its full specifications. Some appliances, such as motors and microwave ovens will only produce full output with sine wave power. A few appliances, such as bread makers, light dimmers, and some battery chargers require a sine wave to work at all. Sine wave inverters are always more expensive – from 2 to 3 times as much.

o Modified Sine Wave
A modified sine wave inverter will work fine with most equipment, although the efficiency or power will be reduced with some. Motors, such as refrigerator motor, pumps, fans etc will use more power from the inverter due to lower efficiency. Most motors will use about 20% more power. This is because a fair percentage of a modified sine wave is higher frequencies – that is, not 60 Hz – so the motors cannot use it. Some fluorescent lights will not operate quite as bright, and some may buzz or make annoying humming noises. Appliances with electronic timers and/or digital clocks will often not operate correctly. Many appliances get their timing from the line power – basically, they take the 60 Hz (cycles per second) and divide it down to 1 per second or whatever is needed. Because the modified sine wave is noisier and rougher than a pure sine wave, clocks and timers may run faster or not work at all. They also have some parts of the wave that are not 60 Hz, which can make clocks run fast. Items such as bread makers and light dimmers may not work at all – in many cases appliances that use electronic temperature controls will not control

The most common is on such things as variable speed drills will only have two speeds – on and off.

• Square Wave
Very few but the cheapest inverters are square wave. A square wave inverter will run simple things like tools with universal motors without a problem, but not much else. Square wave inverters are seldom seen any more.

A power inverter converts 12 volt DC power to standard household 110-120 volt AC power, which allows you to run AC electrical equipment off your car or marine battery for mobile applications, emergencies or simple convenience.

Choosing the Right Inverter Size

One of the most important factor that you must know before buying an inverter is your “Power requirement”. In simple words- what all electrical appliances (like fan, tube lights, television, CFL etc.) you want to run at the time of power failure. The power requirement is addition of the power consumed by various electrical equipments.

Suppose you want 3 Fans, 3 Tube lights, 1 CFL & 1 television to operate at the time of power failure. Below is the power consumed by these items:
1 Fan – 70 Watts
1 tube light – 60 watts
1 CFL – 25 watts
1 Television – 120 watts
Therefore your total power requirement is ( 3*70 +3*60 + 25 + 120) = 535 watts
Find the VA rating of the inverter you need
It stands for the Volt ampere rating. It is the voltage and current supplied by the inverter to the equipments. If an inverter operates with 100% efficiency, then the power requirement of the electrical items and power supplied by inverter is same. But we all know that 100% or ideal conditions don’t exist in real. Most inverters have the efficiency range from 60 % to 80%. This efficiency is also called power factor of an inverter and is simply the ratio of power required by the appliances to power supplied by an inverter. Power factor of most inverters ranges from 0.6 to 0.8.
Hence Power supplied (or VA rating of inverter) = Power requirement ( power consumed by equipments in watts) / Power factor( efficiency).

Second example
Many home appliances and power tools have their wattage rating indicated on the product itself. Wattage rating can also be calculated by using this formula:
Volts (120) x Amps = Watts
To determine if several appliances can be operated at the same time, simply add up their wattage ratings to see if the total falls within the specifications of the power inverter.

Appliance Est.- Watts
Cell Phone  – 24
CD Player-  40
VCR –  50
Satellite Dish  – 75
Printer –  75
Laptop –  60-90
iPod –  120
PS2/XBox –  125
25″ TV –  175
CPAP  – 200
Jig Saw  – 350
Computer & Monitor  – 400
Blender – 400
Refrigerator – 500
1/2″ Drill  – 700
Vacuum Cleaner – 750
Coffee Maker – 800
Iron –  1000
Sub Pump  – 1000
Space Heater – 1000
40″ Fan  – 1100
Toaster –  1200
Circular Saw –  1250
Microwave  – 1250

Battery Basics

Battery is the backbone of an inverter system. The performance and life of an inverter largely depend upon the battery quality. The next big question is “how much back up will an inverter provide?” or for “how many hours it can run all of your equipments?”. This is what is called the battery capacity. It is the battery capacity that decides the back up hours. It is expressed in Ah (Ampere Hours).

In the market batteries with capacity of 100 Ah,150 Ah, 180 Ah etc. are readily available. So how to decide which one do you need? To find this out lets do a reverse calculation. Consider that you need a battery that provides back up for 3 hours.
Battery capacity = Power requirement (in watts) * Back up hours ( in hrs) / Battery Voltage (in volts)
Battery Capacity = (535 * 3) / 12 = 133 Ah
** Value of Battery voltage is taken 12V
Therefore a battery with a capacity of 130 Ah will work for you.
So if you want to run 3 fans, 3 tube lights , 1 CFL and 1 TV for 3 hours during power failure you would need 800VA inverter and 130 Ah battery.
By understanding this simple calculation you not only save yourself from the misleading information shared by inverter dealers but also help yourself in taking correct decision.


– Batteries should be in good condition. Old or weak batteries should be replaced before connecting them to an inverter.
– Automotive batteries are not suited to repeated long discharge and recharge cycles. They will have to be replaced more often than a deep cycle battery.
-Deep cycle batteries are a better choice as a power source for an inverter. They are designed to be repeatedly drained and recharged. It is also a good idea to have more than one battery supplying power to an inverter.
–  The amp hour rating of a battery is the most important measure when choosing a battery for power inverter use. T his indicates how many amps a battery can deliver for a specified period (usually 20 hours), showing how long it will run before needing to be connected to a battery charger.
-To prolong battery life, you should not use more than 50% of the battery’s rated capacity before recharging.
– Reserve capacity indicates how many minutes a battery can deliver a certain amount of current (25 amps for most batteries) at 60-75° F. Batteries will discharge much quicker at lower temperatures.
Safety Tips

– Always use a power inverter that is rated high enough for the device(s) you are running and avoid adapters that would allow more outlets than the unit is designed to accommodate.
-When using your power inverter continuously inside a vehicle that is not running, the engine should be started at least once an hour for 10-15 minutes to keep the battery from discharging. Do not start a vehicle in a closed garage, as the carbon monoxide in the exhaust is fatal.
-Power inverters work best with a battery that is in good condition and fully charged. A weak battery will be drained easily if demands are too high. This could leave you stranded so be sure to check the battery’s condition before using a power inverter in a stationary vehicle.
-If the power inverter is being used while the vehicle is running as in the case of a road trip, there should be no problem with the extra draw, assuming the battery and alternator are in good condition.
– Make sure your vehicle’s wiring harness can handle the current before plugging in an inverter to your cigarette lighter. You may need to hardwire the inverter directly to the battery to safely use it.
• Make sure the inverter is properly ventilated. Even a small inverter generates heat. Check to see if there is an internal fan with any inverter over 100 Watts. Place the inverter in a well-ventilated area when in use.
• Check the owner’s manual for the proper wire size for battery cables when connecting the inverter to the battery. Most manufacturers recommend 4 to 10 feet of cable length, depending on the inverter. Avoid aluminum wire because it has higher resistance to current flow than copper wire.
• Working with car batteries can be dangerous and can result in serious injury, and improper use of a power inverter can lead to electrocution or battery failure, so for your own safety be sure to read and follow any and all safety precautions that are listed in your power inverter owner’s manual.

Running Watts vs. Surge Watts

device  –    running watts starting      –  (surge) watts
Electrical Water Heater (40 gal.)  – 4000 –  0
Hot Plate   — 2500   — 0
Electric Stove – each element 1500-2500    –0
Window Air Conditioner   – 12000 BTU 1200  —–1800
Microwave – varies– 625    —800
Well Water Pump –1000  —1000
Sump Pump —-800    — 1200
Refrigerator Freezer —-800  —1200
Deep Freezer —500  —500
Furnace Blower –800  —1300
Computer— 800—- 0
Television —500 —– 0
Stereo — 400 — 0
DVD Player —100 —- 0
Box Fan  — 300   —- 600
Clock Radio —300  —0
Light Bulb  —75  —-0
Radial Arm Saw—- 2000  —2000
Circular Saw —1500 — 1500
Miter Saw —  1200 —  1200
Reciprocating Saw —   960 —  1040
Electric Drill —   600 —  900
Air Compressor (1 HP)–  1500  — 3000
Garage Door Opener  — 480  — 600
Security System —  180 —  0


Contact us if  you interested in the inverters below


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some inverters below


Here are key product features of the 7.5kva msvalue inverter with IGBT Technology:

DSP based PWM technology using IGBT.
Fuzzy Logic Charging algorithm suitable for all type of batteries.
Constant voltage and frequency.
User friendly display and operation.
Auto self test.
Smart short circuit protection.
Runs very heavy loads.
In built TDR point for compressor based applications.
It uses Digital Signal processing (DSP)
Inbuilt Automatic voltage regulator
Inbuilt Anti surge
Digital charge technology for faster charging and longer battery life
Intelligent Thermal Management for longer life and higher reliability
High frequency based design for instantaneous sine wave control
Regulated battery charging from 150V to 280V
Audio alarm on: battery low pre-alarm, overload & short circuit trip
additional module with the inverter

Module 1: remote access to the inverter using a mobile phone

Module 2: remote access to the inverter using a remote control

Price list:

5kva : 3800000

Battery (8): 85000 * 8 = 680000

Total: 1,060,000.

Here are key product features of the 7.5kva/96volts msvalue inverter with MOSFET Technology:

DSP based PWM technology using MOSFET.
Fuzzy Logic Charging algorithm suitable for all type of batteries.
Constant voltage and frequency.
User friendly display and operation.
Auto self test.
Smart short circuit protection.
It uses Digital Signal processing (DSP)
Inbuilt Automatic voltage regulator
Inbuilt Anti surge
Digital charge technology for faster charging and longer battery life
Intelligent Thermal Management for longer life and higher reliability
High frequency based design for instantaneous sine wave control
Regulated battery charging from 150V to 280V
Audio alarm on: battery low pre-alarm, overload & short circuit trip

Price list:
5kva : 340000
Battery (8): 85000 * 8 = 680000
Total: 1,020,000.

Base on your request we recommend the 7.5KVA/96volts IGBT Technology the whole load can be put on it at the same time.

NOTE: 5KVA/48volt IGBT Technology Inverter will also do the required work, but you can not put the whole load on it at the same time.

Price list for 5KVA/48volt IGBT Technology Inverter
Price list:
5kva : 280000
Battery (8): 85000 * 8 = 680000
Total: 960000

All price has include Installation  of inverter and battery + Delivery.



Ø  One free 100 Amps ANTI-SURGE protector

Ø  Free Installation

Ø  A year Warranty

Why buy our Inverter
1. A year Warranty (1.5KVA-7.5KVA), Two years warranty( 10KVA-20KVA)
2. Promote locally made technology
3. It uses Digital Signal processing
4. Inbuilt Automatic voltage regulator
5. Inbuilt Anti surge
6. Digital charge technology for faster charging and longer battery life
7. Intelligent Thermal Management for longer life and higher reliability
8. High frequency based design for instantaneous sine wave control
9. Regulated battery charging from 150V to 280V
10.Audio alarm on: battery low pre-alarm, overload & short circuit trip

For a full list of inverter/battery  prices




12 bulbs
1 fan
1 tvset
1 laptop
1 printer


1 BATTERY –  N90000




1 Freezer
2 fans
2 tv set
1 laptop
15 bulbs
1 home printer


2 BATTERY –  N180000






4 BATTERY –  N360000



1 AC (1HP)


4 BATTERY –  N360,000



2 AC
1 Fridge



5 BATTERY –  N450,000



2 AC (1HP)



8 BATTERY –  N720,000




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Skype: nigeriagreenaira
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Posted by: | October 1, 2016

Posted on: 2016 October 1