An inverter is a component in a solar system that converts the DC power generated by solar panels into AC power for use in the home or electrical grid. Freedom Forever primarily installs Solaredge inverters. This article will explore the capabilities of the Solaredge inverters. Charge controllers are components that are used to manage charging and discharging of batteries connected to the system.

Solaredge inverters meant for use in battery-equipped solar systems are called StorEdge inverters. A simple way to understand how an inverter converts DC to AC power is to look at the inverter circuit as being 2 pairs of 2 switches for a total of four switches.

The switches are paired so that when switch 1 and 3 are closed, switches 2 and 4 are open. Then, when 1 and 3 are open, 2 and 4 are closed. Each pair of switches will cause the current to switch directions when closed. Those transistors also enable the current to rise and fall gradually as they open and close. This is necessary for the current output to be in the form of a sine wave.

If the transistors opened and closed instantaneously, the output from the inverter would be a square wave, which will not work safely as AC current for many devices. Lastly, the inverter will need to step up the voltage level to VAC. An inverter uses a step-up transformer to accomplish that. All grid-tied inverters are required to isolate themselves from the electrical grid if power fails or falls outside of acceptable limits.

Using an inverter and battery charger on the same battery at the same time

If an inverter is to be used as part of a solar system with batteries, then an additional component called a charge controller will be part of the inverter. Batteries get damaged if they are overcharged, the charge controller prevents that from happening.

Inverter Chargers

Charge controllers do two different things. In solar systems equipped with Maximum Power Point Tracking MPPT charge controllers, they adjust the input power from the solar panels to ensure the maximum possible power output.

If the voltage being generated by a panel is less than the voltage coming from other panels, the MPPT controller will reduce the current coming from that panel so the voltage output is raised. In solar energy storage systems, charge controllers regulate the voltage being sent to the battery to prevent overcharging the battery.

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As the battery gets closer to its rated voltage, the charge controller will gradually reduce the amount of current going to the battery. The excess power is fed into the grid. Many of the solar systems installed by Freedom Forever come with Solaredge inverters.

One of the main reasons Freedom installs Solaredge inverters is their reliability. Many inverters come with only a year warranty. MPPT and voltage management are handled separately for each solar panel in the solar system by the Solarege inverter. Thanks to that, the inverter is only responsible for converting the DC current produced by the panels into AC current. This separation of functions leads to a simpler and more reliable design.

Solaredge uses a proprietary HD-Wave technology that relies on digital signal processing DSP to produce a clean sine wave. This enables the StorEdge inverter to charge the batteries more efficiently since some power would be lost if the inverter had to convert the DC from the solar panels into AC power, and then back to DC power to charge the batteries.

Thus if you manage your power usage wisely during a blackout, you should have enough power to operate major appliances in your home. With a two-battery system, you can get a maximum of 5 kilowatts of power from your system. Any amount of power that you use over that which your system is producing would have to come from your batteries.

LG recommends that the Chem Cell batteries be charged at the rate of 3. At night, with a two-battery system, you have a maximum of You should plan to keep your power usage low enough to make it through the night. For example, if you used an average of two kilowatt-hours of power, the batteries would be able to produce nearly 10 hours of electricity.If you are planning to buy a new inverter batteryyou surely must have reached a point where you got the need to calculate the capacity of the battery you need.

Hence, you are here. You need to calculate the capacity so you can choose the right battery for yourself. Inverter battery capacity simply is just the amount of load and number of hours your inverter battery would be able to last in a single charge.

The formula to calculate the capacity of an inverter battery is not a rocket science. It is a very simple formula and here it is:. You might be thinking, what the heck does that even mean? This simply means how many amperes a battery can deliver in an hour.

An ideal Ah hour battery can deliver A of current for 1 hour, or 75 A for 2 hours and so on. This is the total load your inverter battery will be able to carry. The more capacity your battery has, the more load it will be able to carry for long hours. Total load in this case will be:. This simply means, how long do you want the battery to last when there is a power shutdown. You can estimate this by calculating the average time of power cut your area gets.

For example, usually if power cuts in your area are 3 hours long, that means that you would usually need a power backup of 3 hours. This simply means the voltage of the battery. In India, almost all the inverter batteries have 12V of the input voltage.

However, some inverters have 24V of input voltage too. Put in your numbers in the calculator below and get these calculations done in seconds. The capacity of your battery and the load you put on it will determine how long your battery will last after every charge. For example, if your battery is AH and you put A of load on it, it would last for around 1 hour.Many youtubers use these words interchangeably or incorrectly further adding to the confusion.

Our goal with this post is to simplify and clear up these definitions.

how to charge inverter battery

Before you can understand what an inverter or converter is, you should familiarize yourself on the difference between DC direct currentand AC alternating current power.

AC power runs your typical household electronics. That means anything that plugs into a wall socket is using AC power. This is the power that runs in the electrical grid and power lines.

You will most commonly see AC power in v or v form. DC power is the type of power stored in batteries. Anything with a battery is using DC power internally. You can also power special made electronics like lights, water pumps and vent fans with DC power.

You will most commonly see vehicle DC power in 12v form. When you travel off-grid and run a camper with a battery bank you are using DC electricity from your batteries.

Inverters and Converters allow you to switch between the two power sources. As stated previously, you cannot charge a battery bank directly with v AC city power. Your typical RV comes with a converter built-in. These are simple, single-stage systems which convert v AC power to 12v DC power and slowly charge up your battery bank while simultaneously powering your RV.

This is the best solution when you spend all of your time at RV parks with hookups. However, if you plan to travel off-grid often you should consider upgrading to a smart converter multi-stage converter because they are more efficient.

Smart converters work just like converters, but charge batteries faster and more completely. A smart converter will sense how full your batteries are and adjust amperage and voltage to charge them in an efficient way.In this post we try to understand how the internal body diodes of MOSFETs could be exploited for enabling the charging of battery through the same transformer which is being used as the inverter transformer.

In this article we will investigate a full bridge inverter concept and learn how the in-built diodes of its 4 MOSFETs could be applied for charging an attached battery. In few of my earlier posts we have discussed full bridge inverter circuits and regarding their working principle. As shown in the above image, basically, in a full-bridge inverter we have a set of 4 MOSFETs connected to the output load. The diagonally connected MOSFET pairs are alternately switched through an external oscillatorcausing the input DC from the battery to transform into an alternating current or AC for the load.

Typically, the 4 N-channel MOSFET based H-bridge topology is applied in full bridge inverters, since this topology provides the most efficient working in terms of compactness to power output ratio.

Although using 4 N channel inverters depend on specialized driver ICs with bootstrappingyet the efficiency overweighs the complexity, hence these types are popularly employed in all modern full bridge inverters.

The internal body diodes present in almost all modern day MOSFETs are primarily introduced to safeguard the device from reverse EMF spikes generated from a connected inductive loadsuch as a transformer, motor, solenoid etc.

We know that an inverter is incomplete without a battery, and an inverter battery inevitably requires charging frequently to keep the inverter output topped-up and in the standby condition.

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However, charging a battery requires a transformer, which needs to be a high wattage type to ensure optimal current for the battery. Using a additional transformer in conjunction with the inverter transformer can be quite bulky and costly too. Therefore finding a technique in which the same inverter transformer is applied for charging the battery sounds extremely beneficial.

The presence of the internal body diodes in MOSFETs fortunately makes it possible for the transformer to be switched in the inverter mode and also in the battery charger mode, through some easy relay changeovers sequences.

The anode of the diode is connected with the source pin, while the cathode pin is associated with the source pin of the device. We can also see that since the MOSFETs are configured in a bridged network, the diodes also become configured in a basic full-bridge rectifier network format.

This bridge rectifier network formation of the MOSFET internal diodes actually makes the process of using a single transformer as an inverter transformer and charger transformer very straightforward. The following image shows the direction of current flow through the body diodes for rectifying the transformer AC to a DC charging voltage.

With an AC supply, the transformer wires change their polarity alternately. For the next AC cycle, the polarity reverses, and the current moves as indicated by the blue arrows via body diode D4, battery, D2, and back to the FINISH or the negative end of the transformer winding. This keeps repeating alternately, transforming both the AC cycles to DC and charging the battery.

The following diagram shows a practical design set up for implementing MOSFET body diodes as a rectifier for charging an inverter batterywith relay changeover switches.

We can see another set of relay contacts connected with the transformer V mains side. This winding constitutes the output V side of the inverter. This in turn energizes the inverter side of the transformer and the current is allowed to pass through the body diodes of the MOSFETs for charging the attached battery.

As suggested above, when mains supply is available the Vcc side SPDT relay contact should activate a few milliseconds before the the DPDT relay, at the transformer side.Forums New posts Search forums. Log in Register. Search titles only.

Search Advanced search…. Latest activity. Log in. Install the app. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Scouter66 Start date Dec 10, Scouter66 Free Member. Messages 2. We have a w inverter on our MH which normally fulfils all our off grid requirements.

However having recently purchased an e bike the inverter does not seem to like the load. I'm not sure if it simply overloading the inverter or if there is an inherent problem with inverters and this type of load. I am loathe to get a larger inverter if this will not solve the problem. Does anyone charge e bikes via inverter out there? Thank you. Val54 Full Member. Messages 11, Chuns Full Member.

Yep, we use our w pure sine wave to charge two bike batteries. I tend to try to confine myself to charging them under way, thus not using the battery capacity if possible. PeteS Full Member. Messages I had a modified sine wave inverter which would not work with either of my ebike chargers, Both of which were v only chargers ie not switch mode power supplys.

I tried a v charger on the inverter and it worked ok, So clearly transformer type chargers dont work with modified sine wave inverters. I bought a pure sine wave inverter and both ebike chargers work fine so I suspect your inverter is a modified sine wave and you need to change it. Clunegapyears Full Member. Work fine with our pure sine wave inverter. But agree slowly, although slow to charge anyway even on mains power.

We have 2 inverters, a modified sine wave and pure sine wave one. Whilst the msw is twice the power, the psw one is the only one that will charge our leccy bikes.The following post explains through calculations how to select and interface the solar panel, inverter and charger controller combinations correctly, for acquiring the most optimal results from the set up. For the sake of convenience, let's believe you possess a a watt appliance or load that you would like to operate, free of charge through solar power, for around ten hours every night.

In order to exactly determine the dimensions of the solar panel, batteries, charge controller and inverter the following mentioned parameters will need to be strictly calculated and configured. This becomes the absolute power necessary from the panel. If we assume a roughly ten hour daily optimal sunshine, the specifications for the solar panel could be simply and quickly calculated as explained in the following expression:.

However, you may notice that mostly during the summer seasons you may normally get around 10 hours of reasonable amount of sunshine, but the winter season may produce roughly around hours of effective sunshine. Contemplating the above scenario, you too might agree and recommend considering the worst possible sunshine hour into calculation so that even on the weakest of sunshines your load keeps running optimally.

Therefore taking into account the 4 to 5 hours sunshine per day consideration, we calculate the true power for the solar panel which would enable your load to keep running throughout the year.

If the selected battery is rated at 12V, in that case:.

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Hence, a AH 12V battery is what you may finally require for the inverter. We have so far applied a "plus tolerance" to all the previous parameters, so let's show some generosity to the Amp spec of the panel also, and instead of sticking to the 8.

That looks good, right? Since we already know the maximum load wattage which is Watts, implies that we simply choose an inverter which might be capable of handling a watt comfortably. That implies, we simply need to get an inverter rated at watts, OK, you may be thinking of adding some tolerance to this candidate also, not an issue, instead of watts you can opt for a watt inverter, allowing all the gadgets to happily "shake-hands" and your house powered round the clock forever, free of cost.

how to charge inverter battery

If you have any circuit related query, you may interact through comments, I'll be most happy to help! Your email:. Hello Sir. I have a 20 amp MPPT charge controller.

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Thank you Rick. Dear sir I have been visiting your tech. I am not here to ask question but to say thank you so much for sharing these invaluable lessons free of charge. Many Technicians out there would not do it. How i wish you form a marketing outlet for sourcing electronics components, equipments and books. If that is your related field,and for those us with some electronics knowledge,it will be highly welcomed if you delve into programming.

I mean ic programming lessons. Once again i say thank you so much. Thank you Dear Patrick, I appreciate your thoughts.

I too want to upgrade my knowledge and innovate my website with new features but due to lack of time I am unable to proceed with any of these ventures, although I am always trying my best.

Calculating Solar Panel, Inverter, Battery Charger

Hello Swagatam, I am working on a solar car project and need some guidance regarding the number of solar panels required and their specifications.See hidden discussions Win great prizes Get free support. Forums New posts Search forums. What's new New posts New profile posts Latest activity. Members Current visitors New profile posts Search profile posts. Log in Register. Search titles only. Search Advanced search….

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how to charge inverter battery

Search forums. Log in. Question of the day - Do you have multiple citizenships? Test your broadband speed and win R5, cash. Enter here. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Using an inverter and battery charger on the same battery at the same time.

Thread starter munchies Start date Jul 24, Tags battery battery charger eskom inverter load shedding. Joined Mar 18, Messages Hi All So heres my issue. I thought it would charge the battery and then swap over to the battery when load shedding kicks in. Evidently it does not The inverter has no power cable to a wall plug! So I bought a 12v Battery charger from builders to charge the battery. Now my question is, can I just have the charger constantly connected to the battery as well as the the inverter connected to the battery?

In my mind I should then not see a drop should load shedding kick in. My only concern is that the inverter is constantly working. So would that be a problem? Sinbad Honorary Master. Joined Jun 5, Messages 72, Well as you can see this probably isn't the highest quality inverter.