What Is Off Grid Inverter? What Does Off Grid Inverter Mean?
As the name suggests, an off grid inverter is designed to work on its own as it cannot synchronize with the utility grid. In most cases, this component is usually connected directly to the load not to the grid itself.
An inverter off grid is also referred to as a standalone inverter. This means that you do not have to connect it to the grid for it to work optimally. Once your off grid battery gets charged, an off grid inverter will convert direct current (DC) to alternative currents, before it reaches to the various appliances within your house.
Figure 1: Off Grid Inverter in Use
How Does Off Grid Inverter Works?
Regarding the operations of an inverter off grid is concerned, it is imperative to note that they are mainly connected between solar batteries and various loads that are within house. They are not directly attached to the solar power systems. Before anything commences, an off grid solar panel has charge an off grid battery first. Once the battery get charged, an off grid power inverter takes away that power and converts it from direct current into alternating current. Depending on your home’s wattage needs, you can choose to have two or more off grid batteries.
Thereafter, that power is supplied to different loads or appliances that are present in your house. In fact, a fraction of power that is harnessed during the day is usually used to run various appliances at night. As long as your batteries have some charge, the off grid inverter assures you consistent use of devices and appliances at home.
What Is the Advantage of Off-Grid Inverter?
Compared to its peer model, an off grid inverter comes with a number of benefits for the user. Some of these advantages include:
- Constant Power Supply– since it works hand in hand with a battery storage, you are sure that you will enjoy constant power supply even when there is a blackout within your locality.
- It’s Self-Sufficient– Unlike the on grid inverter, the inverter off grid is self-sufficient. This can be attributed to the fact that it is able to consume and generate electricity on its own. Like we have mentioned above, this component does not have to be connected to the utility grid for it to function optimally.
- Reduced Costs– It reduces connection costs as you do not have to connect to the utility gird for you to enjoy its benefits. Additionally, the off grid converter reduced the need for you to comply with your locality’s utility regulation. As a result, the model not only helps you to save more money but also enjoy unlimited convenience.
- Use Diverse Power Sources -They can work hand in hand with an array of energy sources. This attribute makes them flexible for many homeowners.
- Eco-Friendly – Once you start using the off grid inverter, you will be able to reduce the need to rely on fossil fuels in the long run. This goes a long way in conserving the environment.
What Is the Difference Between Off-Grid Inverter and On-Grid Inverter?
Also known as a standalone inverter, the off grid inverter works on its own as it is not connected to the utility grid. When solar batteries are well charged, off grid inverter is be able to convert the existing direct current into alternating current and thus allow you to run several devices in your home.
On the other hand, the on grid inverter is usually linked or connected to the local utility grid. In most cases, these components help to supplement the mains power supply. When solar energy is used, the on grid inverter swings into action, thereby allowing you to enjoy alternating current in your home.
However, if the solar energy is negligible, the system switches back to the mains supply. Since the on grid inverters feature a processing intelligence, they are able to determine when to deliver power and when not to. Consequently, this device is able to synchronize power delivery with your locality’s grid power.
What Types of Off Grid Inverters There Are?
When considering what type of off grid inverter to purchase, here are the main types that you are likely to find in the market:
1. Low frequency off grid inverters VS High frequency off grid inverters
Low and high frequency inverters are some of the models that you are likely to come across when looking for an off grid inverter. However, these two inverters are different. For instance, low frequency inverters tend to be heavier than their counter parts, as they come with transformers that are both heavy and large in size.
If you live in an area that experience high surge currents, low frequency inverters are the best option for you. Due to these properties, low frequency inverters are best for industrial application or in places that experience extreme conditions.
On the other hand, high frequency inverters are generally lightweight and usually come with light and small transformers. Thankfully, they are quite efficient when it comes to maintaining a constant load for light loads.
However, these inverters are not ideal if you reside in area that experiences high surge currents. Also, they are not efficient when supplying current to heavy loads or appliances. Since high frequency inverters work well with lighter loads, they are best suited for home use only.
2. Pure sine wave off grid inverters VS Modified sine wave off grid inverters
Pure sine wave inverters are known to yield a clean and stable AC power output whenever they are in use. They produce power that is similar to that from the utility grid. As a result, pure sine wave inverters are ideal for those who have sensitive electronic devices and appliances at home. Therefore, you should bear that in mind if you want to invest in an off grid solar inverter pure sine wave inverter.
Figure 2: Vokek Pure Sine Wave Inverter
Modified sine wave inverters tend to produce an unstable and choppy AC current. As a result of these properties, modified sine wave cannot work well with sensitive electronic appliances and devices. Some of the devices that can work well with this off grid inverter include a toaster, phone chargers, old TVs, laptop chargers, and so on.
Figure 3: Modified Sine Wave Inverters
What Are The Differences Between Pure Sine Wave Off Grid Inverters And Modified Off Grid Inverters?
Pure sine wave off gird inverters differ from modified sine wave off grid inverters in a number of ways. These include:
- Current Output; Pure sine wave off grid inverters are able to offer stable and clean AC output whenever they are running. On the other hand, modified sine wave off grid inverters offers an unstable and choppy AC power output.
- Noise interruption; When using a modified sine wave off grid inverter, chances are that you will hear a humming sound from your audio devices. However, if you connect an audio device to a pure sine wave off grid inverter, you will not hear any humming sound.
- Price; As far as their respective costs are concerned, you will note that an off grid solar inverter pure sine wave price is on the higher end. On the other hand, its counterpart is more affordable.
- Efficiency; When it comes to efficiency, pure sine wave off grid inverters takes the lead. This is because modified sine wave off grid inverters are less efficient as devices that are connected to this model will end up using more power than usual in order to keep running.
- Appliances Used; Pure sine wave off grid off grid inverters work well with sensitive devices and appliances such as computers, medical equipment, laptops, new television sets, microwaves, gaming consoles, compressors, audio equipment, refrigerators, among others. Modified sine wave off grid inverters can work optimally with old TVs, kettles, toasters, water pumps, phone chargers, among others.
Figure 4: Pure Sine Wave vs Modified Sine Wave
What Are the Advantages of An Off-Grid Storage Inverter?
Once you invest in an off grid storage inverter, you will enjoy a myriad of benefits. Some of these benefits include:
1. They are reliable
Since this inverter is not connected to the utility grid, it will still function optimally even when there is an outage within your locality. All that is needed is a battery and a solar panel. As long as the battery is charged, the inverter is able to convert direct current into alternating current and thus offer you a reliable power supply.
2. It allows you to enjoy more independence
By investing and installing an off grid storage inverter, you will not be tied to the terms and policies of your local utility company. In fact, you just need to ensure that you do the right connection and you will always enjoy constant power supply, thanks to solar energy.
3. It is very affordable
Besides the benefits that we have mentioned above, the off grid storage inverter is relatively affordable. This can be attributed to the fact that it does not have to be connected to the utility grid for it to work optimally.
Also, the device allows you to save more on your energy bills as you will not have to pay electricity bills at all. Even when there is a rise in energy prices, your pockets are safe. This makes off grid storage inverters a go-to option for many homeowners.
4. It is effective for those who want to go green
If you are looking for a way to conserve the environment, look no further as investing in an off grid storage inverter is the best solution for you. Once you invest in this device, you will no longer bank on fossil fuels in order to enjoy power supply in your home. Therefore, you will be contributing to environment conservation by being eco-friendly
How To Choose the Best Inverter Off Grid?
When looking out for the best inverter off grid, chances are that you will come across a plethora of models that will mesmerize you. If you are a first timer, you might be spoilt for choice. Fortunately, we have compiled a number of features to look out for, so that you can choose the right model for your home or business. Some of the critical features that you should pay attention to include:
1. Determine your power needs
It is no secret that different homeowners have different power needs. Your home’s power needs will be determined by the number of appliances that you have at the moment. The higher the appliances you have, the higher your home’s power needs are bound to rise. Once you calculate your home’s power needs, you will have an easy time choosing an inverter that suit your needs.
2. Check the off grid inverter’s frequency
Besides establishing your power needs, there is a need for you check your inverter’s frequency before buying one. Ideally, your inverter’s frequency should be compatible with the devices and appliances that you have at home. This way, you can be assured that the inverter will work in harmony with all the devices you might have either at your office or home.
3. Check the inverter’s voltage
It is important to note that an inverter is needed to supply a sufficient amount of voltage to your appliances and electronics. Therefore, you should be keen to choose an off grid inverter whose voltages matches that of your appliances or devices back at home.
4. Type of inverter
Do you want to invest in a pure sine wave inverter or a modified sine wave inverter? Depending on the kind of appliances that you have at home, you can either choose either of the above-mentioned types.
If you have sensitive appliances at home, consider choosing a pure sine wave inverter. However, if you do not have appliances such as an old TV, toaster, phone or laptop charger, be certain that you can go ahead and invest in a modified sine wave inverter.
Different off grid inverters cost different prices. In most cases, the price of these devices is informed by the features a particular inverter comes with. The more sophisticated features your model of choice has, the higher the likelihood of buying that model at a higher price. However, do not compromise the quality of your intended off grid inverter in the name of saving more on cost.
6. Does the model come with a warranty?
Your off grid solar inverter of choice should come with a warranty from the manufacturer. Thankfully, most models come with a warranty of between 1 and 2 years. With this warranty in place, you will not have to worry in case your inverter off grid malfunctions or gets damaged as you can easily get free repair services or even a free replacement model.
7. Is the model efficient?
An efficient solar inverter off grid should channel more AC output to your home when it is operating at an optimal level. Ideally, it should have an efficiency rating should range between 94% and 96%.
8. Can the off grid inverter withstand high temperatures?
When choosing a solar off grid inverter, you should be keen to choose a model that can withstand high temperatures. For instance if you choose to install it in your garage or in any other location outside your home, be sure that it will be exposed to high temperatures at one time or another. Therefore, your ideal model should not be sensitive to extreme temperatures while offering the much-needed stable power supply
Besides the above-mentioned factors, ensure that you choose a model that is certified by eminent agencies such as CE or UL. Luckily, Vokek’s off grid inverters have passed ISO9001: 2008 quality management system certification.
Which Off-Grid Solar Inverter Is the Best for A Home?
The truth is, you will come across different types of off grid solar inverters. However, the best model for you is a pure sine wave low frequency inverter. Unlike other conventional models, this one offers a stable power supply that is similar to that of a utility grid.
Therefore, if you have a sensitive device at home such as your laptop, desktop computers, audio equipment, gaming consoles or medical equipment a pure sine low frequency inverter is ideal for you. Since it’s already a low frequency model, be certain that you will no longer grapple with high surge currents. Even during high surge currents, you will still enjoy a stable AC output.
How Many Batteries Do I Need for Off Grid Solar?
The number of batteries that you need for your off grid solar panels depends on a number of factors. These include:
1. The capacity of the off grid battery
Simply put, your off grid battery’s capacity refers to the amount of electricity it can manage to store at any given one time. In most cases, this capacity is measured in kilowatt-hours (kWh) or in amp hours. It goes without saying that different batteries will always have different capacities. Ideally, you should consider rounding up this figure in order to take care of other pertinent issues such as voltage drop, and inverter insufficiencies among other factors. If your off grid battery has a higher capacity, trust that you will not need many of them to store solar energy harnessed by your solar panel system.
2. Size of your solar panel
Different solar panels come in different sizes. The larger your solar panel is, the more power is bound to be generated. This in turn affects the number of batteries that you need to store that power. If you have a larger solar panel, trust that you will require more batteries to store that energy trapped during the day.
3. Number of sunlight hours
Some days are sunny, while others are relatively cloudy. On a sunny day, your solar panels are bound to harness more solar energy. This means that you might be prompted to add more off grid batteries in order to store more energy that can not only be used during the day but also at night.
4. Your home’s energy needs
To determine your home’s energy needs, there is a need for you to establish the number of electronic devices that will be running in hours on a particular day. Thereafter, multiply the wattage of each of those devices by its run-time so as to obtain the amount of energy you need in watt-hours on a daily basis.
Once you are done, add all the watt-hour values so as to determine your home’s daily energy needs. The higher your home’s daily energy needs, the higher the amount of batteries that you need to install in your off grid solar panel system.
5. Your budget
Depending on your budget, you might either have the luxury to either increase or decrease the number of your off grid batteries that you need for your solar power system. For instance, if you can spend about $120000 on your solar power system, trust that you can manage to purchase more batteries to store the trapped solar energy.
5. Ambient temperatures
In simple terms, ambient temperature refers to the temperature of the air that is surrounding your off grid solar panel. This temperature has a great impact on the amount of power your solar panel can manage to yield.
If this temperature is high, be sure that the solar panel will not produce more power as its internal circuitry will not be operating optimally. Ideally, the solar panel’s internal circuitry operates well at a relatively lower temperature. This further might influence the number of batteries that you need to store the harnessed solar energy.
6. Electricity appliances or loads
Besides the factors that we have discussed above, the number of batteries you need for your solar panels will be determined by the number of devices that you want to power at any given time. For instance, if you have ovens and refrigerators, note that you need more power in order to power them up.
The larger the number of appliances you want to power up in your home, the larger the number of batteries you need to buy. Also, if you are going to power them for longer sessions, you might need more batteries for the same purpose.
How Do I Wire an Off-Grid Inverter?
In case your inverter has a capacity of more than 500 watts, you need to connect off grid solar inverter to the battery using a hard wire. Depending on the model you choose, trust that the manufacturer’s manual will specify the right cable size that you ought to utilize.
Remember that the cable size will be determined by the proximity between the battery and the inverter. For optimal results, always ensure that you use a short cable. Thereafter, make a point of utilizing an overcurrent protection device such as a circuit breaker between the battery and the inverter. By installing a DC disconnect such as a circuit breaker or a fuse, you can be certain that all your components will be safe from electrical fires and other related eventualities.
Are Lifepo4 Batteries Good for An Off-Grid Solar System?
Popularly known as lithium iron phosphate batteries, LifePO4 batteries are ideal for off grid solar systems. Unlike other conventional batteries, these ones boast of having a long lifespan and come with a high energy density. If well maintained, they are capable of lasting between 10 and 15 years.
Besides this, these batteries self-discharge at a relatively lower rate compared to other ordinary batteries. This means that LifePO4 batteries are capable of holding charge for many months without losing any power. When it comes to deep discharge cycles, these batteries hardly disappoint as they can put up with such occurrences seamlessly. This makes these batteries not only to be durable but also reliable to utilize.
What’s The Best Inverter to Pair with Solar Panels?
If you are looking for the best inverter that you can pair with solar panels, consider choosing Vokek off-grid inverter. Compared to other inverters, this one comes with an active cooling system. Besides this, the model is easy and fast to install. Additionally, it is easy to maintain, and can simply be mounted on a wall. Finally, the model offers much-needed flexibility while offering a stable AC power output in your home.
How Do I Size My Inverter for My Off-Grid PV System?
To establish the right size of your off-grid PV system’s inverter, you should first determine the maximum wattage of your home. Here, you should consider summing up all the wattage of your home’s appliance and then make a decision thereafter. For instance, if you normally use a light bulb, refrigerator, TV set, microwave and an iron box at the same time, consider summing up their wattage and then you will be able to select the right inverter size.
Can I Connect My Off Grid Inverter To Utility Power To Charge Battery?
If your off grid inverter inbuilt AC charge, then this inverter can get AC power from the utility power to charge the battery through its AC charger. Therefore, if you need to buy off grid inverter with ac charger, you’d better consult inverter supplier before making the order.
What Does Off Grid Inverter Charger Mean?
Off grid inverter charger also named all in one off grid inverter or hybrid off grid inverter or hybrid inverter off grid, it means off grid inverter inbuilt solar charge controller (MPPT or PWM).
Where To Buy Best Off Grid Inverter?
Vokek is a professional in manufacturing off grid inverter, PERC mono solar panels, solar pump inverter, and solar lights with over 15 years of experience, hot selling to over 100 countries worldwide. Regarding inverters off grid, we have power range from 500 watt to 500kw inverters available. Welcome to contact us for premium quality and the best price for off grid inverters.