New to Solar power- info / help needed

[djbillztgk]

Hi I have general knowledge how they work, but not all the math
Ok say I want this Panel

http://www.ebay.co.uk/itm/BRAND-NEW-190W-MONO-SOLAR-PANEL-FULLY-MCS-TUV-CERTIFIED-FAST-UK-SHIPPING/350693451203?_trksid=p2047675.m2109&_trkparms=aid%3D555003%26algo%3DPW.CAT%26ao%3D2%26asc%3D29%26meid%3D9111116178864965453%26pid%3D100010%26prg%3D1013%26rk%3D5%26rkt%3D15%26sd%3D221250659795%26#ht_763wt_959

(Not sure what this means "44.8V Vmp 37.4V Isc 5.84A Imp 5.09A Pmax 190Wp")
its a 190watt Panel i assume it will run at 44.8v-37.4 variable

so how do I work out what regulator controller i need, as i will slowly expand, I want to store electricity in Batteries and at a later date use them or implement the system into my houses electricity [the grid thing to whatever it’s called]
What is the formula for choosing controller against panel?
I know for battery I will have to use this to gain max Wattage (Volt of batt x Amp from Panel)
And the inverter
I want 2 inverters
1. To implement into my homes electrical grid
2. That will allow me to plug in standard UK 3 pin plugs to sue normal house products such as laptop PC TV etc…
Panel-Chosen
Controller – need more information how to choose
Battery – I think I have this sorted but any additional information will be appreciated
Inverter – need two more info required.

[Sunking]

Since it is a Grid Tied you must use a MPPT controller. Minimum Amps = Panel Wattage / Battery Voltage. so if you use a 12 volt battery then 190 watts / 12 volts = 15.8 amps. So you would be looking for a minimum 20 amp MPPT controller. Now one warning here unless you buy a quality controller most of the inexpensive Chi-Com made MPPT controllers cannot handle the higher voltages of a Grid Tied 72 cell panel. Look at the specs for the Voc input should be 150 volts or higher.

As for battery using this panel at 12 volts you are looking for one as small as 120 Amp Hours or as large as 225 Amp Hours.

Now here is the fun part with the panel, controller, battery, and 200 watt inverter you will spend right around $600 to $800 USD. In you rare the panel will generate about 500 watt hours per day. At battery replacement time in 2 or 3 years means you are paying around $2 per Kwh. Now look at your electric bill and see what the power company charges for a Kwh. Bet it is 1/10 what it will cost you with Solar. So if you think this is going to save you money, think again.

[SunEagle]

Hi I have general knowledge how they work, but not all the math
Ok say I want this Panel

http://www.ebay.co.uk/itm/BRAND-NEW-190W-MONO-SOLAR-PANEL-FULLY-MCS-TUV-CERTIFIED-FAST-UK-SHIPPING/350693451203?_trksid=p2047675.m2109&_trkparms=aid%3D555003%26algo%3DPW.CAT%26ao%3D2%26asc%3D29%26meid%3D9111116178864965453%26pid%3D100010%26prg%3D1013%26rk%3D5%26rkt%3D15%26sd%3D221250659795%26#ht_763wt_959

(Not sure what this means "44.8V Vmp 37.4V Isc 5.84A Imp 5.09A Pmax 190Wp")
its a 190watt Panel i assume it will run at 44.8v-37.4 variable

so how do I work out what regulator controller i need, as i will slowly expand, I want to store electricity in Batteries and at a later date use them or implement the system into my houses electricity [the grid thing to whatever it’s called]
What is the formula for choosing controller against panel?
I know for battery I will have to use this to gain max Wattage (Volt of batt x Amp from Panel)
And the inverter
I want 2 inverters
1. To implement into my homes electrical grid
2. That will allow me to plug in standard UK 3 pin plugs to sue normal house products such as laptop PC TV etc…
Panel-Chosen
Controller – need more information how to choose
Battery – I think I have this sorted but any additional information will be appreciated
Inverter – need two more info required.

The 44.8volt is for Voc or open circuit which means no load.

The panel wattage is based on the Vmp and Imp. So if you take the 37.4volt x 5.09amp you get your 190 watts.

What you want to do can be done but as Sunking mentions you will not save any money with a solar pv/battery system if you have utility electricity available. So be prepared to spend a lot of money if this is what you really want to install.

[djbillztgk]

Since it is a Grid Tied you must use a MPPT controller. Minimum Amps = Panel Wattage / Battery Voltage. so if you use a 12 volt battery then 190 watts / 12 volts = 15.8 amps. So you would be looking for a minimum 20 amp MPPT controller. Now one warning here unless you buy a quality controller most of the inexpensive Chi-Com made MPPT controllers cannot handle the higher voltages of a Grid Tied 72 cell panel. Look at the specs for the Voc input should be 150 volts or higher.

As for battery using this panel at 12 volts you are looking for one as small as 120 Amp Hours or as large as 225 Amp Hours.

Now here is the fun part with the panel, controller, battery, and 200 watt inverter you will spend right around $600 to $800 USD. In you rare the panel will generate about 500 watt hours per day. At battery replacement time in 2 or 3 years means you are paying around $2 per Kwh. Now look at your electric bill and see what the power company charges for a Kwh. Bet it is 1/10 what it will cost you with Solar. So if you think this is going to save you money, think again.

bro u are actually a legand, after all the internet trawlling googling, smashed it, any otehr sugegstions extra info will be much appreciated but looks like i can start thinking about buying the parts, u lot will be seeing alot of me

[SunEagle]

bro u are actually a legand, after all the internet trawlling googling, smashed it, any otehr sugegstions extra info will be much appreciated but looks like i can start thinking about buying the parts, u lot will be seeing alot of me

Then your first step is to determine exactly what you want to run off your system and how many "watt hours" they will consume. It is not worth purchasing anything first until you know what you need and then design the system. You can then get a rough idea of your costs and then decide to move forward or go back to the beginning and lower your usage expectations. Eventually you will get to a point that the money you will be spending is worth it.

[djbillztgk]

Then your first step is to determine exactly what you want to run off your system and how many "watt hours" they will consume. It is not worth purchasing anything first until you know what you need and then design the system. You can then get a rough idea of your costs and then decide to move forward or go back to the beginning and lower your usage expectations. Eventually you will get to a point that the money you will be spending is worth it.

deffo bro, i see were u lot are coming from, i just wanted to get a betetr idea of how the Solar Systems work , liek u both have said knwo iw ill need to asses my usage, and electrical product etc...
even if it dont save me money i will proberly still do it to not rely on the big corps my ultimate goal is to craete a hosue that is self sufficient and hopefully 75%> Green, with minimal imapct on Co2
the mainthing that drains my electricity is my music studio, which i will still run on my prepay meter box. well know i nee dto get details of my supplier