I’m going to talk about how to truly properly size your solar system how much power batteries can really store and the way of solar system really works because it’s pretty amazing how many people that have solar systems don’t truly understand how much power they have and it’s important to know because if you end up with a situation where your modules break your solar panels aren’t functioning.
For a period of time or you have a series of cloudy days it’s good to understand exactly how many kilowatt hours you can actually pull out your battery safely so how many days and how you can ration your power and also that really helps you sighs your system properly without with what appliances you’re using so I’m.
Going to start by explaining how the batteries are set up that first one to say the caps are off the batteries right now because I’m equalizing explain that in another tutorial but hydrogen gas is escaping right now and you don’t want these caps on while that’s happening so right here I have eight Deka LT16 batteries now these are 350 amp hours batteries.
I’m going to explain as part of what i can explain today what that means but before I do that these are set up in two strings parallel together so we have four batteries a group of four batteries that are in series which means that they’re wired from the positive to the negative positive to the negative positive to the negative and then positive to the positive and negative to the negative.
Over to the next string when you wire for batteries in series every time you do that the amperage stays the same but the volts double so each of these batteries is 6 volts so when I put 4 in series i end up with essentially one bigger 24 volt battery the amps are still the same though so what i have here are two 24 volt batteries and then they’re parallel together negative 2 negative and positive to positive and when you parallel.
Two batteries together you double the amprage so i have sized my battery system to make this 24 volts with double the amperage of a single battery so each of these batteries is 350 amp hours ok so first i want to clarify that when your solar panels on the roof the electricity that they generate you’re not using that electricity directly.
You’re never using that electricity directly any time you pull power from solar system you’re always pulling from the batteries the solar panels send electricity to the charge controller and the charge controller reads what the voltage of the battery system is and maybe even a couple other metrics and it determines how it should charge these batteries so if you’re using power during the day the pleading power from these batteries when.
The sun’s out that electricity from the panels is actually directed into the batteries to charge them but it’s not actually but the the power that you’re using your pulling power from the batteries and the solar modules through the charge controller are charging the batteries back up that’s the best way to look at this so that being said you only have as much power to use as what’s stored in the batteries.
How to Solar Power Your Home House 1 On Grid vs Off Grid
Yeah hello everyone and welcome to this series we’re going to talk about how to power your home or house from solar power now first of all i have to say thanks very much to xodar who are sponsoring this series as you have known if you followed any other of my tutorials David of X earlier and his company kindly donated all his time to install.
Solar power of my house and what i like about xlr and and the companies that for one that have a great choice and variety in terms of products and brands David himself like me enjoys tinkering and finding solutions to problems so he enjoys very much getting involved in the technology and making it work well so I certainly appreciate the input now today what I’m going to do this whole series is going to cover off from deciding whether you want an onboard.
System and offgrid system the types of solar panels where to have a charge controller or a grid tie inverter or micro inverters battery bank the solar panels that cost involved isn’t worth that the complications of doing this in south africa vs somewhere like Europe or the states so they’re going to be quite a few few tutorials covering that off and what I ask you is that as I start these tutorials start posting your comments and questions as we go along and armor.
Training corporate there’s into the tutorials as they go along by all means if the tutorial series has been completed or something has been cut off and you slap a question post a comment and I’ll do my best to answer for you and it’s worth posting a tutorial on it I will do what we’re going to start today though it is getting understanding.
All on grid this is off grid but before I walk you through this little picture and and discuss on grid vs off grid and what the grid is and let me just show you some of the equipment so that you are familiar with what I’m talking about when I shade this diagram and then we’ll get down and explain it ok so let’s start off by looking at.
These solar panels we are going to talk about these in detail later on a narwhal might even refer you to some other tutorials that up maybe I talk about the performance of the different types of solar panels under different conditions so the one thing to note that today you can get cheaper panels from china and what have you but you want to be aware that if you do want to use your panels with high voltage systems which is something we’ll talk about you have to.
Consider the quality the build quality and how they put together and that’s something we’ll talk about in terms of the gaps with the connectors we’re also going to talk about monocrystalline this is poly crystalline and amorphous and which seemed to perform better under what conditions this is an MPPT charge controller so it’s a maximum power point tracking charge controller and this device is something our point out which is.
Especially useful in offgrid systems as it takes the power from the solar panels it converts it does a dcd to DC conversion service at the right voltage for your battery bank to charge a set of batteries this can’t supply power directly to your house and that’s why this particular unit is more unit is more useful in offgrid systems but we’ll have a look that when we come to the actual diagram itself right so here we have the grid.