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Anonymous Poster

Solar Panel System

09/13/2010 8:29 PM

Hi, All

What is the output of the solar panel, do they have 110vac

Regard's

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Guru
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#1

Re: Solar Panel System

09/13/2010 8:31 PM

Not directly. You can series a number of panels together to get larger DC voltages, or to get AC you can use an inverter.

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Power-User
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#2

Re: Solar Panel System

09/13/2010 9:13 PM

Electrical output on solar PV panels is measured in Watts. P=IE ; P [power or Watts] = I [amps] x E [volts] I=E/R ; I [amps] = E [volts] divided by R (resistance)

A 110V ac system therefore has a higher amp rating than 240V ac or 415V ac, etc.

As the other 'poster' said - [sorry I didn't pick up your name prior to starting this comment], the output is 'run' through an inverter to 'generate' AC power as PV panels 'generate' DC power.

Obviously it depends on the SIZE of each panel. However a panel used in a camper trailer wouldn't be as large as that installed on a house ..! PV panels sold here in Australia for power generation are typically rated at 190 watts / hour each. So six panels ganged together would have an output rated at 1.14 Kw/Hr.

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#4
In reply to #2

Re: Solar Panel System

09/14/2010 2:44 AM

<...watts / hour.....Kw/Hr...>

Eh?

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Power-User
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#6
In reply to #4

Re: Solar Panel System

09/14/2010 11:10 PM

where are you lost?

As I wrote in my post, watts [P] are the unit of energy generated.

Look at your electricity bill and your light bulbs. Power sold to you is measured in kilowatts [one thousand watts]. Your usage in a light bulb is measured in watts - example a 60 watt bulb uses 60 watts of energy, for EVERY hour it's turned on. Have the bulb turned on for 10 hours, it's used 600 watts of energy, etc.

Comprende' ?

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Guru

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#3

Re: Solar Panel System

09/13/2010 11:12 PM

Use the search window to the right of this window search all of CR4 and you get

http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=solar%20panels&order=asc

and no you cant get 110 vac in fact without an inverter you cant get AC at all from a solar panel they only produce DC

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#5

Re: Solar Panel System

09/14/2010 1:07 PM
  1. Solar PV cell output is DC
  2. Each individual cell is typically about 0.5VDC
  3. Cells in series increase the DC output voltage
  4. Sets of series Cells in parallel increases the output current capability
  5. A device called an "inverter" changes the DC into something that can be used as AC, but technically, it is called "psuedo-AC" (psuedo means "sort of" in Latin). It uses transistors to fire the DC in a series of pulses of varying widths using what is called Pulse Width Modulation, or PWM. The pulses also cyclically reverse 60 (or 50) times every second to create the "alternating" part of Alternating Current (AC).
  6. AC voltage is expressed as as a type of "average" value known as the RMS (Root Mean Squared) of the peaks. So a "110V AC" line is 110V RMS, but the actual peak voltage level is 1.41x that, or 155.1V
  7. To produce AC from DC from PV cells, the DC voltage must be at least the actual peak level of the AC, plus a little cushion to allow for things like shading, low light angles etc. Typical PV output DC voltage then to ensure a 110VAC output is often designed to be around 200VDC, then the inverter can limit that AC output to any value lower than that.

Class dismissed.

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