Power Inverters are Electronic gadgets that converts energy stored in a battery (or DC voltage) to AC voltage that will power your appliances. Their major selling points are their low noise and emission free operations as well as their convenience. This article will guide you on how to buy an inverter for backup power in the home or in the office.
Power inverters are electronic devices that convert direct current (DC) electricity into alternating current (AC) electricity. They play a crucial role in various applications where AC power is needed but only DC power sources, such as batteries or solar panels, are available.
- Power inverters with battery
- Power inverters price in nigeria
- Power inverters price
- Power inverters in nigeria
- Power inverters for home
- Best power inverters
- inverter price in nigeria
- what is an inverter used for
Here are some key points to understand about power inverters:
- DC to AC Conversion: The primary function of a power inverter is to convert DC electricity, which flows in a single direction, into AC electricity, which alternates direction at a specified frequency (usually 50 or 60 Hertz). This conversion allows DC power sources, such as batteries, to operate AC-powered devices like household appliances and electronics.
- Types of Power Inverters:
- Pure Sine Wave Inverters: These inverters produce a smooth and clean AC waveform similar to the power supplied by utility companies. They are suitable for sensitive electronic devices and appliances and are more expensive.
- Modified Sine Wave Inverters: These inverters produce a stepped or modified waveform, which may not be as clean as a pure sine wave. They are less expensive and are suitable for many common household appliances and tools, although some sensitive electronics may not work as efficiently or safely with them.
- Power Ratings: Power inverters are available in various power ratings, measured in watts (W) or kilowatts (kW). It’s crucial to choose an inverter with a power rating that matches or exceeds the total power requirements of the devices you intend to power simultaneously. Some inverters are designed for small devices like smartphones and laptops, while others can handle larger appliances.
- Applications:
- Off-Grid Systems: Power inverters are used in off-grid and standalone power systems, such as solar power systems with batteries. They convert DC electricity from solar panels or batteries into usable AC power for homes, cabins, or remote locations.
- RVs and Boats: Inverters are commonly used in recreational vehicles (RVs) and boats to provide AC power for appliances and electronics when not connected to shore power.
- Emergency Backup: Inverters can serve as backup power sources during power outages, allowing essential devices like refrigerators, lights, and medical equipment to continue running.
- Automotive Inverters: Some vehicles are equipped with inverters that allow you to plug in and power AC devices while on the road.
- Efficiency and Standby Loss: Power inverters have an efficiency rating that indicates how effectively they convert DC to AC power. Higher-efficiency inverters waste less energy as heat during the conversion process. Additionally, some inverters have standby losses, which can draw power even when not actively in use.
- Safety Considerations: When using power inverters, it’s essential to follow safety guidelines and ensure proper grounding. Some high-powered inverters may require special installation and safety precautions.
Where to Buy Power Inverter
Jumia Nigeria
First, Reality Check
The first question to ask yourself is do I actually need an inverter? This question is important because while inverters are alternatives to power generators they are not quite as versatile.
The first challenge for a power inverter is that you need to charge the batteries.
You need electricity to charge the battery of your power inverter. This is a bit problematic if you live in a developing country like Nigeria where public power supply from the grid is not steady.
This means you may not get enough public power supply to charge your battery, which could result in poor performance of the inverter or inability to use the inverter at all. Irregular charging is also bad for your inverter battery.
The ideal person to buy a power inverter is someone who has at least 12 hours of public power supply per day or someone who already has a power generator, but wants a noise free alternative.
For example, I use my power generator during the day (if power supply becomes epileptic) and use my power inverter at night because they operate at low noise and are night-friendly. The generator also charges the inverter battery while it is on.
If you live in an area with less than 12 hours of public power supply, it will not make a lot of sense to buy an inverter, except you also have a power generator or you are willing to invest in a solar power system with solar panels.
It is also important to note that a power inverter is more suited for resistive loads like your household and office electronics like TVs, Computers, Printers, lights, etc.
Power Inverters are not best with inductive loads, so if you are going to be operating lots of machines with motors in them, a generator may be better, except you can find an industrial grade inverter.
Inductive loads like Refrigerators, Freezers, and Air conditioners can be powered by an inverter, just make sure you buy an inverter with high enough capacity and capable of handling their high start currents.
For example, the starting current of a refrigerator could be up to 3 times its current in normal operation. So, a 200w refrigerator could require up to 600w to start. A/Cs are even worse.
Your Power Needs
Once you are sure you need to buy an inverter, the next stage is to calculate your power needs. Simply note the gadgets that you will be operating with the power inverter.
For example, typical load may be 1 TV set, 1 decoder, 1 DVD player, 1 Fan, 1 Laptop, 3 light points.
Then note the power ratings of each of the gadgets. You can find the power rating on the back or side of the gadget. You can also check the manual of the gadget. For example for the load above, the rating could be:
- 1 TV set (100w)
- 1 Decoder (20w)
- 1 DVD Player (20w)
- 1 Electric Fan (70w)
- 1 Laptop (20w)
- 3 energy efficient light points (90w)
- Total Load = 320w
The next step is to get a VA equivalent of the power, which if we assume a power factor of 0.8 gives 400 VA (i.e. 320/0.8)
After calculating your total load, the next step is to derate the power inverter to create some allowance for flexibility and to ensure it does not over work itself.
To derate, just multiply your total load by 2. In the example above 2 x 400 = 800VA. So, you will buy an inverter with a power rating of 800VA or higher like an 800VA Inverter.
You may also decide to multiply by 3 to give more operation allowance for the Power inverter. Note that the aim of derating is to ensure that your inverter does not operate at full-load or near full-load, which will ensure the longevity of the device.
Type of Battery
You don’t just buy an inverter, you also need to buy an inverter battery as that is where the power inverter derives its energy.
The best battery for your inverter is the SMF deep cycle inverter battery. SMF stands for Sealed, Maintenance Free. Though you can use the normal car battery, but they emit poisonous fumes which could have long term impact on your health. This means an SMF battery can be installed indoors making them very convenient.
Another type of battery to use if you do not mind some maintenance is the tubular battery, which are also deep cycle batteries, but require some maintenance.
They require less maintenance compared to car batteries. Tubular batteries are not advisable for installation indoors as they are not completely sealed and could be emitting gases.
deep cycle batteries last longer than regular car batteries because they are optimised for the loading characteristics of power inverters.
They may cost more, but we recommend you buy an SMF deep cycle battery for your power inverter. If you are looking for cost effectiveness and do not mind some maintenance, go with the tubular deep cycle battery.
Number of Batteries Required
An inverter is usually rated in this pattern X VA/Y V, where X is the rated power output and Y is the input voltage required.
For example an 800 VA/12 V inverter will give a maximum output power of up to 800 VA and require an input voltage of 12V. Similarly, a 1.5 KVA/24V inverter will output 1.5 KVA (1500 VA) and require 24V input.
Since batteries usually come in 12 volts voltage, the 800 VA/12 V will require a minimum of one 12V batteries, while the 1.5KVA/24V inverter will require a minimum of two 12V batteries connected in series.
In the same vein, a 3.5KVA/48V inverter will need a minimum of four 12V batteries. When you buy an inverter, make sure you know the minimum number of battery required.
What Battery Capacity
Batteries come in different capacities. The higher the capacity, the longer a battery can last before getting discharged, given similar loading.
A 200 Ah (Ampere-Hour) battery is recommended though a 100 Ah or 150 Ah battery can be managed.
For example, for our example load above (400VA), a fully charged 200 Ah battery can theoretically deliver 6 hours of power while a fully charged 100 Ah battery can only manage 3 hours.
Note that these are theoretical values, actual values may be less (as we ignored inverter efficiency and our power factor is assumed).
To increase the capacity and use time, you connect more batteries in parallel or reduce the load on the inverter.
For example, connecting two 200 Ah batteries in parallel will result in a theoretical energy capacity of 400 Ah and increase the theoretical use time to 12 hours. Note that to connect batteries in parallel you must account for the input voltage.
So, a 12V input inverter will require one 12V battery in each parallel set, a 24V input inverter will require two 12V batteries in each parallel set, a 48v input inverter will require four 12V batteries in each parallel set and so on.
Hence, a 48v input inverter will require eight 12v batteries for 2 parallel sets and twelve 12V batteries for 3 parallel sets.
Compare Inverter Battery Prices
Where to Shop for Power Inverter
Jumia Nigeria
Solar Energy Support
Some inverters come with solar energy support. These inverters enable you connect solar panel(s) to your inverter and tap from the free energy of the Sun. This type of inverter is called a Solar Inverter.
The Solar Panel charges your battery ensuring you have enough energy when needed. Depending on the capacity of the Solar panel, it can charge the battery, while still providing power for your appliances. Solar inverters can also charge your batteries via generators or public power supply.
Note that if you do not buy a solar inverter, you can still upgrade a regular inverter for solar energy by buying a solar charge controller.
If you buy a Solar Inverter, you will not need to buy a solar charge controller separately, since they come with solar charge controller built-in.
You will have to buy the solar panels separately. If tapping energy from the sun is important to you, buy a solar inverter outright. However, you can always buy a regular power inverter and upgrade for solar energy anytime you want.
Battery Level Indicator
Although this is more of wishful thinking as a lot of inverters do not seem to have this feature. However, if you can find an inverter with this we recommend it.
An inverter with battery level indicator will provide you with the relative charge capacity of the battery. This is great for battery management especially if utility power is not reliable.
This will enable you manually shutdown your inverter before the battery gets deeply discharged, which when regular can result in the death of the battery.
Inverter Installation
Except, you have above average electrical skills, you will need a technician to install your inverter. Thankfully, some retailers and online stores that sell inverters offer options with the installation kit, making installation easier for you or a trained technician.
The installation accessories come from the manufacturer of the inverter which ensures everything works well. When buying an inverter it is always advisable to take-up the installation kit.
The cost of the installation kit may be incorporated in the cost of the inverter or you will have to pay separately for it. Make sure you are present to inspect the installation.
Make sure that the cabling connecting the inverter to the battery is as short as possible. This will reduce energy losses.
It is also important to know that a lot of current moves (it could be double or triple digits) from the battery to the inverter, so make sure everything is properly sealed with no naked wires to prevent electrocution.
Installation cost for inverters ranges from 5,000 Naira to 125,000 Naira depending on the complexity of the system.
Inverter Price & Brands
Pricing of inverters for home and office ranges from around 65,000 Naira to 900,000 Naira depending on power output and level of sophistication.
This does not include the battery. A 12V 100 Ah SMF Battery costs around 55,000 Naira, while a 12V 200 Ah SMF battery starts at around 105,000 Naira. You will need from one to more than eight depending on your setup.
Want to buy an Inverter? Some popular brands in Nigeria include Sukam, Prag, Mercury, CyberPower, Luminious, Tripp Lite, Bluegate, etc.
Conclusion
power inverters are essential devices that enable the use of AC-powered appliances and electronics in situations where only DC power sources are available. They come in various types, power ratings, and are used in a wide range of applications, from off-grid solar systems to powering devices in vehicles and during emergencies. Selecting the right type and size of inverter is crucial for efficient and safe operation.
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