[INCO Solar & Energy Management] 2025-12-10 19:17 - Solar&Energy - live lesson

Hello. >> Hello. How are you, Mariano?

I'm fine. Andrew, how are you? I'm fine.

Fine. Fine. I think there is some problem with your network.

>> Can you hear me now? Can you hear me now? >> Yes, I can hear you but uh a bit late.

>> Okay. Let's wait some minutes if someone uh join us. Okay, sure.

I got it. Okay guys, I think that we can start. How are you?

Everything okay? Zazi, can you hear me? Are you in library as usual?

>> Oh, yes, we can hear you. I can hear you. Very good.

Sh. Now it's Now it's better. great to to see you.

I'm trying to connect my my headphones. So, let's wait a minute. Everything okay guys?

Let's uh tell me what did you do during this uh this lesson with Sebastiano. If if everything was okay, if you want to review something, >> I wasn't at the previous lesson anyway. You wasn't in the lesson.

In the lesson? >> Yes. Uh because I went for an interview.

So I I didn't meet up before I could come back. It's already late. So >> Okay.

Okay. Come back. Okay guys, have you have you go on with the with the with your project?

Tell me something about that. I am >> okay. How it was?

>> I just start a little bit but uh >> Okay. >> I was not uh working continuously on that because uh >> Okay. >> My wife is pregnant and uh >> Yes.

>> I have to you know a lot of >> Yeah. Yeah. Understood.

Understood. But you was present during the Sebastiano lesson. Yeah.

>> Yes. Yes, I was present in all the lectures. >> Okay.

Okay. Okay. Perfect.

Perfect. >> Okay. >> Zazi, are you writing something on chat?

You was absent during the last lesson. Zazi. Okay.

Does our lesson are recording? If yes, how we can access to the video of preview lesson? Yes, the lesson are every everyone um are are every all lesson are record uh record.

So you can um take the the lesson from discord. Are you in the discord channel zi? Okay.

In the discord channel you will find the link where you can uh you can find all the lesson. Okay. Tell me after maybe this our lesson if everything was okay and did you did you catch that during that this lesson Sebastiano uh explain the um the structure.

So the uh fix how to fix solar panel into the roof and the and the different type of uh of this this structure and to the lesson of today is um is regarding another argument another uh component of photoaltch. Let me say the the most important one because it's the like really the brain of the of a photo system and fortunately is not really related to the uh to the structure but is of course related to the uh the solar panel. So I want to ask you every one of you um uh understand has understood the how to calculate the voltage of the string or how to connect the solar panel one with the other one.

Yes. Uh uh I can I I know how to connect through uh string and I know how to connect it parallel >> and I also yesterday told that uh uh some uh in string then the string will be connected to a parallel. >> Yeah.

Yeah. for partner or you and you and J was present where I introduced this these things how to calculate it the the voltage of the string because it's really important know that to understood the lesson of today. Uh yes uh I know but uh >> I need to uh recall it but I I don't >> Okay.

Also also for you we we we do a quick >> I I think it should be better if we can do a little recap on that. >> Guys let let's let to do a a quick quick recap during this this lesson. Oh, my You know, okay guys, let's start the the recap from this slide.

This slide show all the components of the photo voltage system. Okay, let's review it together. Photo voltage system.

The the components of photo voltage system are of course uh can you see my screen? Yeah. Do you see my screen?

>> Yes. >> Yes. Yes, you can see it.

Okay, perfect. are total panel. So PV models okay so PV models are okay the um okay really the things that we put in our roof or into the floor to uh catch the energy of the sun.

Okay, this panel are uh connected to the um the roof by some structure. Okay, let's see this type of structure for example. Okay, to connect to fix the solar panel to the roof.

Okay, or could be could be another type of structure. Okay, for example, let's see this type. Okay, this type of structure.

Okay, and that are physical component. Okay, the structure are physical component. Of course, solar panel are electrical components because in in every solar panel we will find two different cables.

Okay, every solar panel have two different cables. Okay. One is uh okay behind the solar panel there are there there is this it's called junction box.

The junction box have two type of cable. Okay. With this cable this connector you can connect solar panel one with with the other one.

Okay. So you can form the string when you connect one solar panel with one solar panel with one solar panel with one solar panel. You form the solar string.

Okay. At the end of the solar string you have the do you have two different type of cable. You have the positive and the negative one.

So red and green. Red and black. Okay.

Positive and negative. Okay. So look this image.

You connect one solar panel with the other one. At at the end you have only two two type of connector that are that one. One is red and one is uh black.

Okay. Two different these two cable go to the inverter. Let's return to the scheme.

So I connect these two cable could be two or could be four or could be six or could be eight. It depends the number of the string of our photovoltaic system. But let's let's do the the easy the easy example.

Yeah. We connect negative to the positive and the next negative to the next positive to make a string. >> Yeah, exactly.

>> Okay. >> Negative, positive, negative, positive, negative, positive. Woman, man, woman, man.

The type of connector. Okay. And uh this this uh negative and positive we will have at the at the end of the string one negative and one posit positive.

For each string of our photovoltaic system we will have one negative and one positive. One red and one black. Okay.

Cable. These two cables. We connect these two cables to the inverter.

Okay. Inverter is this the components who and we introduce inverter during the the lesson of today to the uh to convert the energy from uh uh continue to alternat DC from uh from DC to AC. Okay.

Um we um learn how to calculate we learn how to calculate the value of current and voltage that this the string the solar string products. Okay. So we and I will show you how to do it.

So I'm I'm opening the the project that We we did it together. Let me start the review from there. Okay guys, to connect correctly to connect correctly the the string the photo string to the inverter we have to know we have to know how we have to know the characterist of the model and the parry characterist of the string.

So we have to know the current. So the current current ampere and the voltage. Okay.

So how we can calculate it? If we connect and this is the important things. If we connect solar modules in series the value every solar every solar module have power.

Okay. Value of power value of tension value of current. If we connect this solar panel with another one solar panel with another one solar panel with another one solar panel, we have to calculate the total of voltage the total of ampere.

We have to sumare the voltage and the value of the current remain the same. Okay. So in this case if we have a string of four models if we have a string of four models of this type of models we have to sum this current.

So current of panel one is 3 37 and 72 30 here. Here you have the value 37 and 72 plus 37 and 72 plus 37 and 72 37 and 72. Okay.

So total are 116 voltage that are the value at the end of this cable. Okay. So if we use the the instrument that is called voltamero we will check the value of 106.

I will try to show you a video on YouTube to to check to understand to understand this. And the value of the current if we connect for the voltage system in series is the same I want to show you the instrument that is important. This is the instrument guys.

Can you see my screen? Okay. This is the instrument.

Okay. to me measure the value. Okay.

Is a lot of look here. Look here. You will insert negative and positive and you will receive the value of tension.

Okay. >> Okay. Not why is important to know this type of of measure because we can't we have to uh to be attention we have to be attention at the value of current and voltage when we connect the string to the inverter.

Okay, it's clear these one guys. These are that are important things. It's clear.

>> Yes. Yes. >> Is clear?

Yeah, it's clear. Perfect. Okay, guys.

So, let's start to introduce the new argument. The new argument is the photo type inverter. So what are the photo voltake inverter?

During this lesson we will see what are the the what are the the the main function of the photoaltike inverter. What are the type the the type of inverter that you use in our market and the size of it. We will analyze together the uh technical details of an infotic inverter and we will see how are the um the really the function of it and how is the the most important characterist inverter.

Okay. Oh, inverter. When we maybe in Italy talk about inverter, most of people thought about this about air condition because air condition have looks here dual inverter that is a functionality and and use this type of um of function.

But photo inverter photo is is different. is not a a air conditioner. Okay.

Is the the um the technical part of the photo system that that can convert so change the energy from DC to AC. Remember that the solar panel produce energy in DC and in our house or in our company or in our industry or in our restaurant everywhere we use energy in AC. So we need to convert we need to convert the energy that the solar panel product to use it in our building.

Okay. So what what are the the the different from uh DC to AC? So the the direction is for DC is constant constant AC var when when we see uh on on graphic photo DC is um linear and AC is with carbs.

Okay. And the most important thing is the uh frequency. Okay.

that is 50 Hz in Europe of the AC. The frequency of the DC is zero. Okay, that are some photovoltaic inverter.

Look every photo voltake inverter. In every photo inverter, we will see if our correctly stolen not only a graphic that is connected to some cables. Look here there is cables.

Okay. And we will see this type of cables. So the scheme is the is this is really really easy.

Solar panel connect to the inverter and the inverter connect to to the h to our house to the point where is the energy in the house. Okay. in the uh the the planners uh represent the inverter in the the scheme of photoaltic system with this type of figure.

Okay. is a um quadrat quad is square guys I don't remember it sorry is uh is square and here is represent DC current and here AC current okay there is this type of diagonal okay so let's see the type of inverter we can have inverter centraliz inverter where arrive only two cables positive and negative shape. This type of inverter is used when when there is parallel of the string where the string are connecting parallel.

So >> yeah this the this are connecting parallel and in parallel I have only one cables. Okay. >> Okay.

Uh in this type of in this type of inverter >> there is only one input and one output. >> Yes. Exactly.

There is only one positive and one negative input. Okay. These are used in the big big big photovol system.

[clears throat] The most popular one is the string inverter where I can connect every single string to the in the photo voltage system to the inverter. So positive, negative and I have one um um um okay you you understand me so you have one two three four and I can connect string one thing two string three string four okay is called string inverter okay or I can have but is um not popular one I have micro inverter. So micro inverter is one panel one inverter.

One panel one inverter. One panel one in one one inverter. So um is another type of of inverter.

Okay. This is type of in big big inverter is not common. Of course in our project are uh really not not used because we will see um only um string inverter in our project.

uh of course in the residential one but the same in the um the CNI project and the the central one are of course more than 100 kilowatt of power and all the energy are in only one point of course is better uh to uh to maintain this because uh you can uh repair only one to um to uh to give energy. But of course if that if that inverter uh stop it stop the production you have the uh stop of total uh our uh photovoltaic system. So the the energy output will be zero and the uh the use of this uh centralized inverter are in the solar uh solar camp.

Okay. where where the module are are on the floor and I have big big big photo tech system and I need this type of of inverter. Okay, DC the string I have uh more input I have input one input two input three and we will see uh in the technical details of inverter how many string I can connect to each one to each inverter and I um and of course the the sides are um are low because it's from 2 kilowatt to uh 330.

I think that today the the big uh string inverter are of course the the uh the power have have the power of 330 and the montain is it's easy but I have to identify the string that have problem to solve it and uh the use of this string inverter um is of uh for residential. Okay. So in our house and of course in our in our company.

So during and into our our project we will use this type of of inverter. Okay. So string inverter.

Of course the string inverter could be hybrid could be hybrid uh and uh hybrid. So uh it means that uh there there is one input dedicated to the battery. Okay.

There is all input 1 2 3 4 5 could be 10 could be 20 uh for the string but in a hybrid string inverter there will be one input for the battery. Okay. A micro inverter is uh the things that I tell you before.

The um is a really really small inverter connect to one panel and uh convert the um the the energy product from the panel directly. uh and I I have to uh only connect the models and the inverter uh each by one to the to the um the quadrical of our house. Okay.

So this example then string inverter I have the I have connect the the inver the panels uh in series and I connect the the string to the inverter. This one is uh one micro inverter for each um panel. Okay, let's see this that is a um this is um inverter of my company the company where I where I work.

I work in Fonius that is one of the most important um inverter pro pro producer in in the world sites s cited in in Austria and uh and this is one of our of our inverter is res for residential use is an an type of inverter that could be from 3 to 12 kilowatt. And I will use this this uh inverter. This the the connection of this inverter to uh to show you to show you uh how can uh connect the um I I can do the connection from the string and from the um the cables from of the house to the inverter.

So let's see the right at the uh part we have PV1 plus PV1 plus PV2 plus PV2 plus but minus PV2 minus PV2 PV2 minus PV1 minus PV1 minus Can you hear me? >> Yes, I can hear you. Can you hear me?

Because that Okay, now you can. Okay, perfect. So for example, yeah, for example, guys, how many string do you think that I can connect here?

Let's try it. Let's try it guys. How many string do you think that I can connect here?

>> Four. >> Why you say it? It's correct.

Why you say it? Uh because uh there is four positive terminal and four negative terminals. >> Perfect.

Perfect. So for each positive and for each negative I can connect to one string. And what do you see another type another particular things that this inverter is inverter is inverter is inverter like >> have four four positive four negative and you have also >> uh we have also uh it's uh What?

>> Oh, what is this? I think this one is the output point. >> But this two >> uh battery battery >> input to battery.

Correct. >> So this is a string inverter where I can connect four string and the battery. So is a string hybrid inverter.

Okay. >> This is the left part. Okay.

Most of most of uh of time at the left part there is DC part. So from photo voltage panel I will go down and I connect directly to the inverter the string. Okay.

At the right part I have AC. AC I have to connect our house. In our house I have phase plus neotropatera.

In this case is singlephase system because I have only one phase L1. I have n that is neutral and this is the signal of the ground. Okay.

So this is one phase string hybrid inverter. In the center of the inverter I will find the connection to the um internet. Okay.

So I have LAN connection LAN. This is I can connect also with Wi-Fi and also I have this type of connection that it useful to connect and to manage the information from inverter to the battery and from the inverter to the meter to the smart meter that we will see it during during the next next lesson. Yeah.

>> Uh this one is the inverter. Okay. Uh this will handle uh one from uh incoming from the solar like photo.

Uh is this uh uh inverter handle the connection direct come directly from the home like uh the home energy. Try to repeat it because I didn't catch you. >> Uh because this inverter deals with one point coming from the photo volico.

>> See >> is this inverter handle the current coming from the house >> like direct point with the uh energy that we that we use our house. >> Yes. Yes.

Yes. This is this is the connection from the inverter to our house. >> Like this this inverter uh like the weather is not good, the sunlight is not good, the battery is not charging properly with the photovolt.

So the battery will take electricity from the house and it will charge the battery through our uh >> could be could be could be a functionality. This inverter, for example, this inverter, this model of inverter that is called Fronius Primo Geni Quattro Plus have this type of functionality that can recharge the battery not only from the solar panel but could could charge the battery also for the G from the grid. Uh I I sent you a photo because this uh this photo vol I I installed at my house 3 years ago.

>> It's a 2. 5 kilowatt per hour. Uh 35 2.

5 kilowatt. >> Uhhuh. Yeah.

and and it's work with both like a grid electricity and the photo >> could be could be a functionality. Yes. Yes.

Where is it this installation in your your country? >> Yes. It's in Pakistan.

I just installed it three or four year ago. >> Yeah. Yeah.

Yeah. So, yes. Very good.

Okay. Okay. Let's see what are the uh the most important uh characterist uh to the to the inverter.

So of course the the the name and the model. So identifi that the name and the model identify the the the production and the the specific code of the inverter typology. So if the inverter is one phase or three-phase of hybrid uh the number of MPPPT let's uh let's have attention about it.

MVPVT it means max point uh tracker point power tracker and another um character is the um class of protection. So the EP grad if um it this this indicator it uh is help helpful to understand to understand where I can install the photo volic inverter. So if I if could be um installed at the at the outside could be uh installed in um particularly uh situation.

Okay. Uh, MPPPT, the MPPPT is maximum point powerpoint tracking. Okay.

Is the technology that the inverter have inside to optimize the energy product from the string. Every string have one tension, one value of tension and one value of ampere. Okay.

And um the MPPPT is the system that can take the maximum value of this voltage and ampere and use that value to products energy. Okay. Why is important?

Because of course I could have a different type of tension, different type of power. This the the for example in this curve I have to be sure that the tension should be 10 to have the maximum power of our string. And this is this is the the the the job of the MPPPT.

the MPPPT. Um, for each MPPPT, I can connect the string of the same current and the same tension could be attention of it guys. I have uh and this is related to the past lesson for if I have same models.

Okay. and I have a string of four models and I have a string of five models. Okay, so string of four, a string of five.

The current are the same if I have a string of the same model of four or five panels current are the same or not. Did you understand the question guys? >> No.

Can you repeat? >> Okay, I will. I'm preparing the example because it's really really important to understand Okay.

Oh, let's suppose that Let's suppose that one panel have value of voltage of 20 volt and level of current of 5 ampere. So with this value the power of the panel what are the power of the panel with this value if I have voltage 20 volt and current 5 ampere okay 100 watt >> 100 watt perfect okay let me say Now the value of the current and the string uh the current and the and the voltage of this string and that string. Here we have four pel.

Here we have six pel is the same not agree with you judg uh >> no with six it's 120 lot I think. What >> I think it will not change. Let >> let's start let's start from the value of the voltage of the string.

>> It's four four panel. >> Four panels. >> Uh with four panels it's uh uh like uh 80 80 >> I'm sorry but >> correct >> I will >> and current >> uh current will be current >> current >> current will be >> five current five ampere Okay.

Because it's on series and on series I have to sum all >> 5 amp or 4 ampere. >> Let's go. Sorry.

4 ampere. No, five five a five ampere because current remain the same. >> It will remain same.

Yes, it will remain same. >> Okay. Perfect.

Let's see this. Okay. Now is easy.

I have six panels. So I have 120 volt and five ampere. Okay.

Here I have a string of 800. But here I have a string of 1. 2 kilowatt.

Okay, perfect. Correct. Z the connect in Syria we have different voltage that is the sum of the voltage of each model and uh same correct correct.

Okay guys, if I connect If I connect If I connect this string, this one with this one in the same MPPPT. So let's let's connect this to M PPPT1 and this to MPPPT2. Do you think that this is possible or not?

Uh I think no. >> Okay, the is the correct answer. Why I can't connect it?

Because if I connect >> because have different powers. >> Yeah, we have different different voltage. So go in conflict.

I can't the MPPPT can't understood the correct value where start to productions power because the MPPPT don't know if is 80 or if it's 120 okay and I can't produce correct power. So this is to say you that I have to connect to each MPPPT tracker of the inverter only the string that have same voltage and same uh current. Okay.

If I do two string of four models, I can connect both to MPPPT1. But if I have different value I have to connect to MPPPT2 I can't connect to MPPPT1 no is no okay I will insert these two slide to the lesson okay it's clear that guys. >> Yes, it's here.

>> Perfect. So, let's do 10 minutes around of of stop and after we will continue it and I will show you a technical uh SC inverter. Okay, let's see you in 10 minutes.

Okay, thank you. I see your no already pass. So this [snorts] I will buy it.

But before this, these people make their own and for me to start maybe no properties management if you buy it because um the US the American and the uh the centralized bank is costing bra today by 8:00. So that means for move the market that's why the market has been confirmating [clears throat] for a while. So if you are buying buy that's why I just now so before 8:00 we the market stop.

So I'm just I see a bullish a bullish confirmation this market. So that's an entry. You understand?

So if you're buying for Okay, understand. Okay. Because it's like time is going like that.

I have to do something. So and I just see everything. I said no let let me try because all the things you used to send there I see things is going oh this guy is building this guy so you are building them and I'm sitting there watching like that no this one I have to do it.

Yeah. So as you said they will do the same thing then you are my mentor. You are our mentor.

You understand? Yeah, professional one. >> It's not easy.

This this is not easy. I swear. Okay, guys.

Can you hear me? >> I think yes. >> Yes, I can.

Yeah, I can hear you. You have some question of the things that I say you or is everything. >> Yeah.

Yeah. >> Very well. Very good.

Okay. Let's see the other um technical characteristic pan inverter and after it I will introd introduce you the the technical speed of the the photoaltike inverter and then we will see some videos on YouTube how to install photoike inverter and how to connect it. So the um nominal power okay so the nominal power is the max power that an inverter can produce.

If I say I have an inverter of 6 kilowatt 6 kilowatt is the max power. Okay. So the potent potent nominal.

Okay. tension tension nominal tension is the standard of the the tension that that the inverter give and could be 230 volt if is one phase 40 volt for 400 volt if if it's three phase the frequency is every time for 50 Hz cos fe is the um it's not easy to understand but is the the the capacity of to regulate the tension And the current and is useful for for support of the grid and in the most of of scenario is one cos is one and the other is the max current that a photoike inverter can give. Other are the um efficiency.

So the the is is the really really important in the the solar panel in the inverter is not so important because the inverter have a um a percentage of uh efficiency really really high. I don't know if I remember you for example the efficient the max efficiency that an an photo tech panel have are 25 28 in the the most uh most in the in the better case in the in the inverter the efficiency are 96 97 so are not related because it's really other is the efficiency of M50 and after all the protection that are integrate into the inverter could be the sovereign uh protection the protection of the the short. No.

Okay. foreign. Okay.

Okay. Okay. >> Okay.

Seeow chow chow chow chow. I will search a video on YouTube. I want to show you uh a video that that I realize uh this uh this summer during an important fair and I present all the product of my company that are all photovoltaic system And uh after it we will if if you have some question I will answer you.

And after it we will decide one technical ski of one of these and we will comment it together. Tell me if you are able to hear also the sound. [music] >> You hear also the sound?

>> Yes. Yes. Yes.

Yes. Yes. Yes.

[music] Fantastic. storage. Wardrobe Limber Grand Intern [music] Infin.

Pilot Pro. Integrity. forch.

We can't hear anything again. [music] [music] Heat. Heat.

[music] Heat. Heat. [music] [music] [music] Heat.

Heat. >> [music] [music] >> What do they say you can about their Forever inverter. chech.

Inverter Fore about for smart meter. Wi-Fi point inverter point. Forever Smart inverter.

This is this is important things because guys this this um type of of system is called smart meter. this meter uh per me per per meter the um it's useful to read how many energy go to the house energy the house need from the grid and is is is the the instrument that can give the client the uh instant situation of how many kilowatt the photo system are producing, how many kilowatt the house are asking for and all the situation. Okay, these are really really important components and this is situated in the quadrico.

Okay, but we have a part of lesson in the next week dedicated to these uh these components. Thischech. Inverter resistance.

Let's let's go on in the battery not for now. What what do you say about about the before? >> I didn't get to say what >> what >> I didn't hear what you said.

>> Okay. Sorry. H I was saying that the network is uh is keeping us of the when we are watching the video the documentary.

>> Okay. Uh I didn't catch you. Sorry.

>> Your network your network was not quite okay when you are playing the YouTube. >> Ah okay. Sorry.

I I share now the um the technical details of of investor and we will see together if we if we catch the most important uh value of this uh of this Do you see it? Yes. Perfect.

Okay, let's see. Okay, here we have the company, the owner of the product. So, Fronus in this case, this is the name Primo Gen 24.

Okay. And this is the family. So in this technical detail we will see we will find primo gen 24 sides from three 3 to six some uh picture about the system.

Okay let's go here. Okay let's try together to uh identify the most important value. Okay.

So this is the model. Okay. We have Primo Gen 24 and 24 plus 3.

0 3. 6 4. 0.

Okay. Let's read for uh let's read only 3. 0.

Okay. So this one. Okay.

Let's start number of MPPPT. So the first information is the number of MPPPT. Okay.

Is the number of uh system that I show you before. So the number of calculator that can uh calculate the value of the string. Okay.

I have to to share okay is the number of calculator in this case we have 2 okay so we can connect for example this situation if we have different type of of value we can use both MPPPT okay Second. Okay. Range detention.

This is uh important really really important because is the minimum and the max voltage that the photo voltage the photo voltage inverter can receive. It means if we have a string with the voltage lower than 65, this photo voltic inverter will be not active. If we have a string more than 600 volt, this inverter can be burned.

Okay, we understand it. This is really really important value because we have to create the string. So we have to decide the number of solar panel based on this value.

Okay. We have tension nominal tension that is a value inside this interval tension start. So this photo voltage inverter start with a tension of 80 volt.

This is the range of MPPPT the range of one. It means that this photo for photo voltake inverter can MPBT can manage this interval of attention and after it we have based on two different MPPPT two value of DC current and max DC current. So this is the nominal DC this uh current that can manage the inverter and this is the max current that the inverter can manage.

Okay. And this is the number of connection. So each MPT can receive two type of string.

In fact, as I show you before in the the photo, this inverter have as Shahid said before four connection two for each MPPPT PV1 PV1 PV1 minus PV1 minus PV2 PV2 plus PV2 PV2 minus. Okay. So two MP each MPPPT have two connection.

Last value is the DC um power. Okay. So the maximum power is 30.

1 kilowatt. Okay. DC and AC is 3 kilow.

the the AC value is every time related to the name. So if here we have Primo 20 gen 24 plus 3. 0 zero it means that we will have a AC power of 3 kilowatt okay someone have question about it it's clear maybe it's not too easy to understand now but day by day we will understand it Okay, let's end the technical skid with [clears throat] all the the general data.

So we have the dimension of the inverter, we have the um weight, we have the class of protection. So is EP66. It means that this inverter could be uh positioned also out.

There is active cooling technology to um cooling this type of inverter. And this is the range of temperature where could be installed. Also here we have all the protection that are also other important uh information.

So we have DC we have okay are both all of three are three important protection that most inverter have integrate same time and also the other important things is the um efficiency as I said you before the efficiency of the inverter is really really um higher um in comparison to the the the efficiency of the panel. In this case we have an efficiency of uh 80 97 um per percent. Okay, here we have the same value but for the other uh type of of inverter 4.

6 6 5. 6 and 6. 0.

Okay guys, in the next lesson we will do exercise to find the correct inverter to the H photoike string that we create in our project. Okay. So the important things is that you have to work to this project to be ready to add the inverter to your project.

Okay. I know that you uh that Sebastiano also go on with this project and you you did with him the the the part and you identify the structure uh to connect the the panel to the to the top of the of the build. But we you have to work on it because we have to go on and we have to add things day by day.

Okay. So don't be uh try to to do and to go with with us. Okay.

Someone question Shah everything okay? Did you understand it? >> Yes everything okay?

Thank you. >> Perfect. Z also for you.

Everything okay? Yeah. Yeah.

Everything is fine. >> Perfect. Okay guys, for for today we have finish.

I remember you that you have lesson next week on Monday and Thursday. Okay. So 15 and 16 with Sebastiano from 6 to 18.

Okay. Okay. That means you guys that means tomorrow next tomorrow no lesson.

Hello Marino. >> Yeah, sorry. >> That means that means tomorrow and next tomorrow.

No lesson. >> No, no, no, no. Next lesson will be 15 and 16.

We will uh write an advice on Discord. Okay. >> Okay.

No problem. Thank you. >> Ciao, guys.

Have a nice evening. Bye-bye.