Posted by assnast on June 6, 2004, 10:58 pm
I currently have a 55 watt panel on my RV that has worked great for years.
I would like to add more power and found a good deal on a good used 75 watt
panel. Can I add the 75 watt panel in parallel with my exixting panel to
get more output or, electrically speaking, would this be a bad idea?
Thanks,
Dave in a Cave
Posted by William P.N. Smith on June 7, 2004, 7:46 am
>I currently have a 55 watt panel on my RV that has worked great for years.
>I would like to add more power and found a good deal on a good used 75 watt
>panel. Can I add the 75 watt panel in parallel with my exixting panel to
>get more output or, electrically speaking, would this be a bad idea?
That's a fine idea, though you may not get 130 watts due to maximum
power point inequalities, you'll still get more than twice as much as
you were getting before. Nothing will be damaged.
--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com
Posted by uguess on June 7, 2004, 5:33 pm
wrote:
>I currently have a 55 watt panel on my RV that has worked great for years.
>I would like to add more power and found a good deal on a good used 75 watt
>panel. Can I add the 75 watt panel in parallel with my exixting panel to
>get more output or, electrically speaking, would this be a bad idea?
>Thanks,
>Dave in a Cave
I believe you will want to put isolation diodes on the output of each
unit to protect them.
Posted by Solar Guppy on June 7, 2004, 7:33 pm
Why would you do that ? , for protection ? , which would be over current ,
the manufactures suggest a series fuse
Connecting similar voltage panels in parallel is proper design practice.
Using series diodes is a waste of power ( current time voltage drop of
diode)
> wrote:
> >I currently have a 55 watt panel on my RV that has worked great for
years.
> >I would like to add more power and found a good deal on a good used 75
watt
> >panel. Can I add the 75 watt panel in parallel with my exixting panel to
> >get more output or, electrically speaking, would this be a bad idea?
> >
> >Thanks,
> >Dave in a Cave
> >
> I believe you will want to put isolation diodes on the output of each
> unit to protect them.
Posted by uguess on June 7, 2004, 10:21 pm
On Mon, 7 Jun 2004 19:33:12 -0400, "Solar Guppy"
>Why would you do that ? , for protection ? , which would be over current ,
>the manufactures suggest a series fuse
>Connecting similar voltage panels in parallel is proper design practice.
>Using series diodes is a waste of power ( current time voltage drop of
>diode)
As I understqand, the reason for the diodes is, for example, if one
panel is in shade and the other is illuminated, as when the shadow of
trees moves across the surface.
>> wrote:
>>
>> >I currently have a 55 watt panel on my RV that has worked great for
>years.
>> >I would like to add more power and found a good deal on a good used 75
>watt
>> >panel. Can I add the 75 watt panel in parallel with my exixting panel to
>> >get more output or, electrically speaking, would this be a bad idea?
>> >
>> >Thanks,
>> >Dave in a Cave
>> >
>> I believe you will want to put isolation diodes on the output of each
>> unit to protect them.
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>I would like to add more power and found a good deal on a good used 75 watt
>panel. Can I add the 75 watt panel in parallel with my exixting panel to
>get more output or, electrically speaking, would this be a bad idea?