Wednesday, Mar 31, 2010 at 00:02
Hi Allan
Mainey made a statement his panels are 100 % efficient.
THEY ARE NOT!!
For simplicity sake it is usual to say "I need to put so many amps into the battery to charge it"[actual should be referred to as Amphrs.
But you took ENERGY out of the battery in supply lights, stereo etc which use energy which in electrical terms are called WATTS & those devises are RATED in WATTS
That is their power consumption
You have to replace that energy with WATTS
Watts [power ]= volts by amps
Or are you saying all the laws the elecrical ratings etc are built are wrong
I hope not or that puts you in the same class as Mainey
Lets take power energy a little further.
When charging a battery it heats up ,why, because of the energy loss & the chemical process taking place
The chemical process itself needs energy to take place& again I REPEAT electical power is measuerd in watts It is using watts to charge
Watts = volts by amps Without volts you cannot have power
This seems to be the point that have some very confused.
Because of the changing voltages during charge & discharge means the WATTS used or the watts going into or out of battery are also changing,
So the amps were some where along the line used , because that is reasonably constant with a constant current power source [
solar panels]
Here is a liitle example that you & others may understand
Do you accept that a battery generates heat when it is being charged??
Do you accept that energy ,WATTS, are consumed by lights etc & it has to be replaced
Do you accept that heat represents energy [WATTS] being used??
Do you accept that watts is amps xvolts ??
Do you therefor accept that you have to replace the WATTS used
IF so then you must use both load volts & amps as shown on Maineys own meters
AMPS X volts = watts
Another example: If you accept that lamps etc use energy & part of that energy is converted to heat
What happens when due to a dead short in a circuit the load voltage falls to near zero,
What power showing as heat is used in that circuit & let's use Mainys 12v amps, because with a constant current power source it will only be a small encrease./
The answer is very little because the voltage is zero But the amps are still 12 power WATTS =amps X volts = 12 x0 = 0
Nowr little energy is expendedin the load
WHERE does that energy go .
It is expendd in the source itself ,the reason equipment burns out due to overload
Mainey has a nice set up ,it works,well but for reasons he & others do not understand
The manufacyuers of all power sources rate thier equipment in WATTS that is the only way it can be done
Mainey's 204W panels are only putting out part off their capacity
They are no where near 100% efficient
The fact that Mainy sticks to his statement that volts & watts mean nothingcontinues to show he has a complete lack of knowledge.
Perhaps I should say he has atiny bit of knowledge,
BUT as the saying goes "alittle knowledge can be dangerous' & it certainly is in this case. with his constant refusal to accept that without voltage in the equation amps mean nothingas far as power out put is concerned & THATiS WHAT WE ALL BUY POWER,WATTS.
Might add "there are none so blind as those who do not want to see ". this is very applicable on this thread
The simple answer to Mainy's question is he is wrong he has not & cannot shown that panels are any where near 100% efficient in power output exceptt if/ when the LOAD voltage is approx 17v
Relook @ the % figues above for differant state of charge in batterys
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