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Solar panel Q
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JTM
Aug 22, 2014, 6:27:38 AM8/22/14
to
Seems fairly quiet on here for a long time but:
I have been given a solar panel and wonder if I can use it?
Details on the panel are:-
WP=5 watts, Voc 24 Volts, Isc 350 mAmps
Vspec 15 Volts 1@ Vspec= 324 mAmps
System Voltage Maximum=50 Volts
I've measured the output at 24 volts and wonder if this will
be too high for my 12v vehicle battery?
I haven't found anything useful on google
Cheers,
John M in sunny France
--
John Mulrooney
NOTE Email address IS correct but might not be checked for a while.
A soul that knows not to presume, is Heaven's, and its own, perfume
I have been given a solar panel and wonder if I can use it?
Details on the panel are:-
WP=5 watts, Voc 24 Volts, Isc 350 mAmps
Vspec 15 Volts 1@ Vspec= 324 mAmps
System Voltage Maximum=50 Volts
I've measured the output at 24 volts and wonder if this will
be too high for my 12v vehicle battery?
I haven't found anything useful on google
Cheers,
John M in sunny France
--
John Mulrooney
NOTE Email address IS correct but might not be checked for a while.
A soul that knows not to presume, is Heaven's, and its own, perfume
bert
Aug 23, 2014, 7:03:42 AM8/23/14
to
In message <543b20003...@free.fr>, JTM <usen...@free.fr> writes
meter across the terminals
15v at 324mA gives 5w
At 5w I wouldn't think you need a regulator
So I think you would be OK BIANAE
To test connect a 12v 5w bulb across the terminals and observe - or
better still measure the current going through the bulb with an ammeter.
--
bert
>Seems fairly quiet on here for a long time but:
>I have been given a solar panel and wonder if I can use it?
>
>Details on the panel are:-
>
>WP=5 watts, Voc 24 Volts, Isc 350 mAmps
>Vspec 15 Volts 1@ Vspec= 324 mAmps
>System Voltage Maximum=50 Volts
>
>I've measured the output at 24 volts and wonder if this will
>be too high for my 12v vehicle battery?
>
>I haven't found anything useful on google
>
>Cheers,
>
>John M in sunny France
>
Voc is the open circuit voltage so would expect 24v if you simply put a
>I have been given a solar panel and wonder if I can use it?
>
>Details on the panel are:-
>
>WP=5 watts, Voc 24 Volts, Isc 350 mAmps
>Vspec 15 Volts 1@ Vspec= 324 mAmps
>System Voltage Maximum=50 Volts
>
>I've measured the output at 24 volts and wonder if this will
>be too high for my 12v vehicle battery?
>
>I haven't found anything useful on google
>
>Cheers,
>
>John M in sunny France
>
meter across the terminals
15v at 324mA gives 5w
At 5w I wouldn't think you need a regulator
So I think you would be OK BIANAE
To test connect a 12v 5w bulb across the terminals and observe - or
better still measure the current going through the bulb with an ammeter.
--
bert
Riddles
Aug 23, 2014, 7:55:40 AM8/23/14
to
"bert" wrote in message news:RLgqMvEO...@nospam.co.uk...
days, without a regulator?
I am no expert but I think I heard that there COULD be problems if no
regulator was used. Perhaps they just wanted to sell me a regulator!
Riddles
JTM
Aug 23, 2014, 9:10:12 AM8/23/14
to
In article <lt9vfq$op$1...@dont-email.me>, Riddles
must be drained after the summer visitors!
> Is there any danger that the panel could drain the
> battery at night/on dull days, without a regulator?
> I am no expert but I think I heard that there COULD be
> problems if no regulator was used. Perhaps they just
> wanted to sell me a regulator!
Thanks. That's my understanding too from a google check on
shottky diodes / solar panels
[as an aside]
your message came through as part of Bert's sig, perhaps
your news programme isn't set up properly
John (It's still sunny and I'm slightly burned)
--
John Mulrooney
NOTE Email address IS correct but might not be checked for a while.
The good we stand on is our truth and honesty.
<Rid...@privacy.net> wrote:
> > Voc is the open circuit voltage so would expect 24v if
> > you simply put a meter across the terminals 15v at 324mA
> > gives 5w At 5w I wouldn't think you need a regulator So >> I
> > think you would be OK BIANAE To test connect a 12v 5w
> > bulb across the terminals and observe - or better still
> > measure the current going through the bulb with an
> > ammeter. -- bert
Thanks for that - should have thought about a test - mind
> > Voc is the open circuit voltage so would expect 24v if
> > you simply put a meter across the terminals 15v at 324mA
> > gives 5w At 5w I wouldn't think you need a regulator So >> I
> > think you would be OK BIANAE To test connect a 12v 5w
> > bulb across the terminals and observe - or better still
> > measure the current going through the bulb with an
> > ammeter. -- bert
must be drained after the summer visitors!
> Is there any danger that the panel could drain the
> battery at night/on dull days, without a regulator?
> I am no expert but I think I heard that there COULD be
> problems if no regulator was used. Perhaps they just
> wanted to sell me a regulator!
shottky diodes / solar panels
[as an aside]
your message came through as part of Bert's sig, perhaps
your news programme isn't set up properly
John (It's still sunny and I'm slightly burned)
--
John Mulrooney
NOTE Email address IS correct but might not be checked for a while.
Neil
Jan 14, 2015, 10:39:29 AM1/14/15
to
On Fri, 22 Aug 2014 11:27:38 +0100, JTM <usen...@free.fr> wrote:
>Seems fairly quiet on here for a long time but:
>I have been given a solar panel and wonder if I can use it?
>
>Details on the panel are:-
>
>WP=5 watts, Voc 24 Volts, Isc 350 mAmps
>Vspec 15 Volts 1@ Vspec= 324 mAmps
>System Voltage Maximum=50 Volts
>
>I've measured the output at 24 volts and wonder if this will
>be too high for my 12v vehicle battery?
>
>I haven't found anything useful on google
>
>Cheers,
>
>John M in sunny France
Apologies for late response, only just sunscribed to this NG.
>Seems fairly quiet on here for a long time but:
>I have been given a solar panel and wonder if I can use it?
>
>Details on the panel are:-
>
>WP=5 watts, Voc 24 Volts, Isc 350 mAmps
>Vspec 15 Volts 1@ Vspec= 324 mAmps
>System Voltage Maximum=50 Volts
>
>I've measured the output at 24 volts and wonder if this will
>be too high for my 12v vehicle battery?
>
>I haven't found anything useful on google
>
>Cheers,
>
>John M in sunny France
You wont need a regulator for a 5W panel, but you WILL need a blocking
diode to prevent the battery from discharging through the panel when
its voltage falls below your battery voltage. I had a second-hand 10W
panel and only used a diode!
Neil
John Mulrooney
Jan 16, 2015, 3:07:45 PM1/16/15
to
In article <b73dba14ot7u84qih...@4ax.com>,
When you've taken the trouble to reply, no apology needed!
> You wont need a regulator for a 5W panel, but you WILL need a blocking
> diode to prevent the battery from discharging through the panel when
> its voltage falls below your battery voltage. I had a second-hand 10W
> panel and only used a diode!
Ta for the input, it could be useful for keeping the leisure battery topped
up or even the ride on mower
John
When you've taken the trouble to reply, no apology needed!
> You wont need a regulator for a 5W panel, but you WILL need a blocking
> diode to prevent the battery from discharging through the panel when
> its voltage falls below your battery voltage. I had a second-hand 10W
> panel and only used a diode!
up or even the ride on mower
John
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