The TLDR:
=============
My background - auto-didatic computer twit, very tech inclined, hobbyist solderer/fixer/builder but no EE : (
I have a *flexible*, 50W solar panel; at top it has elec junction (board), for tabs of the panel's cells to meetup. This junction has 3 inputs, 2 outputs, and two components. The components are flat, almost-square, 2-pin, the size of your fingernail, and labelled Line1:"PJ357SVM" Line2:"1045V2". What are these 2, identical components? (I presume blocking diodes but the partnums google up with no matches). Ultimately I want the basic V & I specs for these (presumed diodes).
The Verbose:
=============
The 3 attached pics show:
1) Panel, showing placement of board and still soldered in place (tabs protrude up, into slots)
2) Closeup of board:
- The 3 inputs are the 3 slots (center, left, right)
- the 2 outputs are at right- and left-most circular holes
- Electrically, the two components are arranged serially
3) A schematic; BlackBlob is the board; X & Z are the 2 components; Red/Blue/Yellow show the 3 inputs
The Backstory:
===================
- Panel's Vopen would drop 50%, depending on how I held the panel - broken main-tab/trace?
- Started surgery at junction
- Want to know specs of diode - might want to replace them since I was overheating the board to free it from the tabs - hence the curvature in the removed-from-panel board : (
- FWIW panel still puts out its labelled Vopen (+/- 1V) and still blocks reverse voltage at dark
The Questionnaire:
=====================
Primary:
Q1) Are the two components in fact diodes? If not, what?
Q2) How'dyaknow?
Q3) Might you know where I can find specsheet, or what are the specs of these critters?
Secondary:
Q4) Why does there exist the center-tab input to the circuit - I'd have thought that simply having the diodes inline with the + or - output from the panel, would suffice? Or maybe I'm just being confused by the layout, and a simple schematic depicting differently would elucidate?
Tertiary:
Q5) Is there a way to test the (relevant-to-me) functioning of the diodes, esp as it might relate to power losses (i.e. am I losing more than before I over-heated the critters?)
BTW, I love the panel - took a beating for 5 yrs before I had this prob - found the problematic trace, resoldered, and it's back to new - a second honeymoon ; )
Full specs are:
Prated=50W
Vopen=21.2V
Ishort=3.05A
Vpeak_power=17.6V
Ipeak_power=2.84A
=============
My background - auto-didatic computer twit, very tech inclined, hobbyist solderer/fixer/builder but no EE : (
I have a *flexible*, 50W solar panel; at top it has elec junction (board), for tabs of the panel's cells to meetup. This junction has 3 inputs, 2 outputs, and two components. The components are flat, almost-square, 2-pin, the size of your fingernail, and labelled Line1:"PJ357SVM" Line2:"1045V2". What are these 2, identical components? (I presume blocking diodes but the partnums google up with no matches). Ultimately I want the basic V & I specs for these (presumed diodes).
The Verbose:
=============
The 3 attached pics show:
1) Panel, showing placement of board and still soldered in place (tabs protrude up, into slots)
2) Closeup of board:
- The 3 inputs are the 3 slots (center, left, right)
- the 2 outputs are at right- and left-most circular holes
- Electrically, the two components are arranged serially
3) A schematic; BlackBlob is the board; X & Z are the 2 components; Red/Blue/Yellow show the 3 inputs
The Backstory:
===================
- Panel's Vopen would drop 50%, depending on how I held the panel - broken main-tab/trace?
- Started surgery at junction
- Want to know specs of diode - might want to replace them since I was overheating the board to free it from the tabs - hence the curvature in the removed-from-panel board : (
- FWIW panel still puts out its labelled Vopen (+/- 1V) and still blocks reverse voltage at dark
The Questionnaire:
=====================
Primary:
Q1) Are the two components in fact diodes? If not, what?
Q2) How'dyaknow?
Q3) Might you know where I can find specsheet, or what are the specs of these critters?
Secondary:
Q4) Why does there exist the center-tab input to the circuit - I'd have thought that simply having the diodes inline with the + or - output from the panel, would suffice? Or maybe I'm just being confused by the layout, and a simple schematic depicting differently would elucidate?
Tertiary:
Q5) Is there a way to test the (relevant-to-me) functioning of the diodes, esp as it might relate to power losses (i.e. am I losing more than before I over-heated the critters?)
BTW, I love the panel - took a beating for 5 yrs before I had this prob - found the problematic trace, resoldered, and it's back to new - a second honeymoon ; )
Full specs are:
Prated=50W
Vopen=21.2V
Ishort=3.05A
Vpeak_power=17.6V
Ipeak_power=2.84A
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