Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 21-03-2018, 06:36   #1
Registered User

Join Date: Jan 2017
Location: Irish Sea
Posts: 1,133
Images: 6
"Ideal diodes" for solar array

Those who are after Schottky's might find these circuits on fleabay interesting: they act like diodes but their forward voltage is in the millivolt range:

Ailavi DC 4~28V 15A Anti Reverse Irrigation Ideal Diode Module

Or a bit different design & wider voltage threshold:
LTC4359 15A Solar Charging Anti Reverse Irrigation Ideal Diode

I am thinking on a series-parallel panel setup and thinking about something similar to protect the parallel groups against countercurrent (in case e.g. the port or starboard side is shaded).
__________________

__________________
Useful as a fireproof bottom paint...
GTom is offline   Reply With Quote
Old 21-03-2018, 08:24   #2
Registered User

Join Date: Jan 2017
Posts: 11,761
Re: "Ideal diodes" for solar array

Maybe overthinking?

But if the science project yields benefits IRL, do please post results here!
__________________

john61ct is online now   Reply With Quote
Old 21-03-2018, 08:40   #3
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 6,683
Re: "Ideal diodes" for solar array

They say 8 milliOHM, not millivolt drop.
There's a difference with solid state stuff.
__________________
One should try to "Die Young" as old as possible.
senormechanico is offline   Reply With Quote
Old 21-03-2018, 08:44   #4
Registered User

Join Date: Jan 2017
Location: Irish Sea
Posts: 1,133
Images: 6
Re: "Ideal diodes" for solar array

Quote:
Originally Posted by john61ct View Post
Maybe overthinking?
Likely. The case when the blocking element becomes useful is when one of the parallel groups is shaded/out of the game and the active group starts to feed it besides of the controller (battery->panel loss at night shouldn't be problem with the controller in place).

Anyway, might worth that 10$, if I manage to get the thing in an MC4 compatible waterproof package I'll report back. MC4 packaged standard diodes (not Schottky "of course") are available but they add ~3% loss to the system if not more.

Quote:
Originally Posted by senormechanico View Post
They say 8 milliOHM, not millivolt drop.
There's a difference with solid state stuff.
From the first listing:
Quote:
The voltage drop measured data (for reference only):
Load current of 2A voltage drop 0.0086V
Load current of 5A voltage drop 0.022V
Load current of 8A voltage drop 0.036V
Load current of 10A voltage drop 0.042V
Load current of 12A voltage drop 0.052V
Load current of 15A voltage drop 0.075V
__________________
Useful as a fireproof bottom paint...
GTom is offline   Reply With Quote
Reply

Tags
solar

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Blocking Diodes in Parallel Solar Panels? Training Wheels Electrical: Batteries, Generators & Solar 21 13-09-2016 01:10
When Ideal is not ideal - Cheap source of good hose clamps? svlamorocha Plumbing Systems and Fixtures 29 19-12-2014 08:29
Ideal Boat for Large PV Array? sailorcrat Electrical: Batteries, Generators & Solar 17 16-04-2010 04:37
Building a Solar Array Gradually HobieFan Electrical: Batteries, Generators & Solar 8 16-09-2009 19:09
Optimal Solar Array Wiring Keegan Electrical: Batteries, Generators & Solar 7 26-07-2007 11:53



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:04.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.