Posted by sunnybouy60 on January 12, 2006, 12:37 pm
Hi guys, I was wondering if someone could explain to me (in simple terms)
the forumla to determine how many PV panels are needed in a PV system?
I understand that Total Watts x Hours Usage Per Day = Total Watt Hours
and that
Total Watt Hours / Voltage System ie 12v = Total Amp Hours
and that
A Deep Cycle battery should only be discharged 50% so double the battery
capacity to cover the Amp Hours
now.... how do I determine how many PV panels I would need???
I know it is dependant on the amount of sun per day and my geographical
location. Also what is the forumla for determining the size of the Inventer
that would be needed? Can someone help me out here?
Thanks!!
Posted by prcsolex on January 12, 2006, 1:10 pm
While many folks have successfully tackled this on their own, my
recommendation is to contact a dealer that specializes in this. No
matter what size system you end up getting, it's not a small
investment. If an inverter is blown due to faulty installation, you
could be talking anywhere from $1k to $4k to replace. Or, miswiring a
battery bank could quickly give you an acid bath.
If you are determined to do this on your own, I would recommend
searching the Home Power website, www.homepower.com This is a great
resource for do-it-yourselfers.
solargooroo
Posted by S.C.F. on January 12, 2006, 1:17 pm
want the anecdote?
--
ÒÖÕ ÎÉÍÁÇÕ ÇÙÇÙÇÙÇÙÇÙÇ
-------------------------------------------
-------S.C.F.---------
íÙÌØÎÉ ÍÎÅ boyarskij@mail.ru
> Hi guys, I was wondering if someone could explain to me (in simple terms)
> the forumla to determine how many PV panels are needed in a PV system?
> I understand that Total Watts x Hours Usage Per Day = Total Watt Hours
> and that
> Total Watt Hours / Voltage System ie 12v = Total Amp Hours
> and that
> A Deep Cycle battery should only be discharged 50% so double the battery
> capacity to cover the Amp Hours
> now.... how do I determine how many PV panels I would need???
> I know it is dependant on the amount of sun per day and my geographical
> location. Also what is the forumla for determining the size of the
> Inventer that would be needed? Can someone help me out here?
> Thanks!!
>
Posted by SJC on January 12, 2006, 1:33 pm
That is a bit like asking "how big is a fish". You make the system the
size you want to make it. I have seen grid tie inverters as small as 1KW
and they may make some smaller. If you buy a 1kw sine wave grid tie
inverter and use less panels, it will only supply to the grid what the
panels can provide. If you have more panels, then the inverter will
supply to the grid only what it can invert from DC to AC.
If you are not going on the grid you can just charge batteries and
use a square wave inverter to power small tools and those inverters
start at 100w or less.
> Hi guys, I was wondering if someone could explain to me (in simple terms)
> the forumla to determine how many PV panels are needed in a PV system?
>
> I understand that Total Watts x Hours Usage Per Day = Total Watt Hours
>
> and that
>
> Total Watt Hours / Voltage System ie 12v = Total Amp Hours
>
> and that
>
> A Deep Cycle battery should only be discharged 50% so double the battery
> capacity to cover the Amp Hours
>
> now.... how do I determine how many PV panels I would need???
>
> I know it is dependant on the amount of sun per day and my geographical
> location. Also what is the forumla for determining the size of the Inventer
> that would be needed? Can someone help me out here?
>
>
> Thanks!!
>
Posted by S.C.F. on January 12, 2006, 1:43 pm
hello,SJC!!!!
want the anecdote?
--
??? ?????? ???????????
-------------------------------------------
-------S.C.F.---------
?????? ??? boyarskij@mail.ru
> That is a bit like asking "how big is a fish". You make the system the
> size you want to make it. I have seen grid tie inverters as small as 1KW
> and they may make some smaller. If you buy a 1kw sine wave grid tie
> inverter and use less panels, it will only supply to the grid what the
> panels can provide. If you have more panels, then the inverter will
> supply to the grid only what it can invert from DC to AC.
> If you are not going on the grid you can just charge batteries and use a
> square wave inverter to power small tools and those inverters
> start at 100w or less.
>> Hi guys, I was wondering if someone could explain to me (in simple terms)
>> the forumla to determine how many PV panels are needed in a PV system?
>>
>> I understand that Total Watts x Hours Usage Per Day = Total Watt Hours
>>
>> and that
>>
>> Total Watt Hours / Voltage System ie 12v = Total Amp Hours
>>
>> and that
>>
>> A Deep Cycle battery should only be discharged 50% so double the battery
>> capacity to cover the Amp Hours
>>
>> now.... how do I determine how many PV panels I would need???
>>
>> I know it is dependant on the amount of sun per day and my geographical
>> location. Also what is the forumla for determining the size of the
>> Inventer that would be needed? Can someone help me out here?
>>
>>
>> Thanks!!
>>
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> the forumla to determine how many PV panels are needed in a PV system?
> I understand that Total Watts x Hours Usage Per Day = Total Watt Hours
> and that
> Total Watt Hours / Voltage System ie 12v = Total Amp Hours
> and that
> A Deep Cycle battery should only be discharged 50% so double the battery
> capacity to cover the Amp Hours
> now.... how do I determine how many PV panels I would need???
> I know it is dependant on the amount of sun per day and my geographical
> location. Also what is the forumla for determining the size of the
> Inventer that would be needed? Can someone help me out here?
> Thanks!!
>