Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-08-2017, 11:39   #1
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,026
High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Well, I did my first off-grid solar install in 1984 (with just a Ford voltage regulator)....and over the years have done some more with PWM and MPPT controllers....
And, been installing solar on boats (my own, my brother's, and others) since the 90's...


On my current boat, in 2006 I installed four 130watt Kyocera panels (Vmp ~ 17.6v / Voc ~ 22v), using two Blue Sky 2512ix controllers...
They've served me well, and except for a few low-level "birdies" on the 18mhz and 22mhz bands, never have had any HF RFI!!
The panels are mounted within inches of the backstay antenna, and the controllers are inches away from the M-802 HF radio...
No RFI issues!

But...

But, now I want to change my panels to Sun Power panels...
These are high-voltage panels....
Voc is 68vdc
Vmp is 57.3vdc
So...
So, I will need a new controller!

I will probably end up with two 360 watt Sun Power panels....(and might still keep two of my 130 watt Kyocera panels, with their own controller networked to the controller for the higher-voltage Sun Power panels??)
But, I will worry about the Kyocera panels/controllers later...
What I would like here, today, is to learn what higher-voltage charge controllers would produce no HF RFI (or as little as possible)...
{btw, I'm aware of RFI mitigation, with running of wiring, ferrites, etc....but on a 47' sloop, everything is darn close....and ferrites will be used if needed...but wish to learn what MPPT controllers capable of handling 68 volt (57Vmp) panels, with as little, to no, RFI..}


For two Sun Power panels, forming an approx. 720 - 750 watt array, Voc ~ 68vdc, Vmp ~ 57vdc....Nominal "12vdc" electrical system on-board, max charge current expected to be 50 - 60 amps...

Choices seem to be:

a) Morningstar Tri-Star TS-MPPT-60


b) OutBack Flexmax 60/80


c) Victron Blue Solar 100/150


I've read bad things about RFI from the Outback controller...
But, haven't read anything about the Morningstar TroSatr, nor the Victron's...

To be clear, I do not want to spend 1000's of dollars on new Sun Power panels and new MPPT controller, spend days installing everything and then find out I've ruined my HF radio reception! (I'd certainly try it all out on the deck before mounting the panels, but still I'd like to know this before I spend the $$$!)



Anyone that has any experience with these higher-voltage charge controllers and any HF Radio RFI they produce, please respond!


Thank you all in advance!

Fair winds.

John
__________________

__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 16-08-2017, 12:25   #2
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,759
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Hum...

Why not build a metal box to mount the solar controllers in. That and feric chokes on the in and out wires should attenuate the noise on HF.

Just a thought. I think most charge controllers will be noisy on hf. Even led lights can be noisy at some frequencies. With my 12V panel I just made a bypass switch DPST that bypassed the input around the my cheaper PWM controller to output if I wanted to use HF. It would work with 12V panels but not so good with the high voltage ones. Mind you that only worked in the morning before the battery's were at, or near 90-100%
__________________

__________________
sailorchic34 is offline   Reply With Quote
Old 16-08-2017, 12:48   #3
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,026
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Thanks for the input!

FYI, my current controllers are in metal boxes, and I do have ferrites....but even if the controllers are sitting out in the open and no ferrites on anything the Blue Sky controllers have little to no RFI!!
And, I just wish to find what other controllers will be the same! Using the higher voltage panels?

And, yep....
I could just switch off the panels/controllers when using the radio, but really don't want to do that.

fair winds...

John
__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 16-08-2017, 13:13   #4
Registered User

Join Date: Jan 2017
Posts: 1,659
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Probably worth posting this Q in specialist ham radio forums. Those ARES guys with portable post-disaster rigs are pretty clued in to finer points of RFI
__________________
john61ct is offline   Reply With Quote
Old 16-08-2017, 13:29   #5
Registered User

Join Date: Mar 2014
Posts: 35
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

I use the Outback, 900W solar, and I have SSB, VHF, satcom, satTV, GPS and no issues what so ever. The outback is about 15 feet away from the main aerial and dome array which are on an arch with the panels each side.

The SSB aerial is one of the two backstays and I use a counterpoise for the ground and a ICOM aerial tuner.
__________________
Ip485 is offline   Reply With Quote
Old 16-08-2017, 13:32   #6
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,026
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

John,
Actually one of "those guys" is me....
Kinda a pain when I'm supposed to be the expert, and I can't find real-world data to base decisions on...
I've been in HF radio a decade before even messing with solar...
And, I'm someone that does track down RF sources and RFI....being doing it for decades...
(I just don't want to spend $$$$ on some new solar and ruin my HF set-up on-board...


BTW, I did get some good info from Morningstar themselves...where they quoted their FCC Class B RFI/EMI specs....and the guys at Blue Sky said if I cam wait 'til later this year or early next year, they should have some higher voltage controllers (but in my experience, that could mean waiting a year or more)

And, I also did my research over on qrz and eham...and found some old info (bad news about Outback controllers, etc.)...
Did a search here abouts as well....found little about HF RFI and high voltage controllers...

Also, on land....it's all about distance....just get the panels and controllers away from the HF antennas...or get the antennas away from the panels/controllers...
And, of course shielding the wiring (metal conduit, etc.) is also much easier on land...


Fair winds..

John
__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 16-08-2017, 13:38   #7
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,026
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

IP485,
Thank you!
This is some good news...
Quote:
Originally Posted by Ip485 View Post
I use the Outback, 900W solar, and I have SSB, VHF, satcom, satTV, GPS and no issues what so ever. The outback is about 15 feet away from the main aerial and dome array which are on an arch with the panels each side.

The SSB aerial is one of the two backstays and I use a counterpoise for the ground and a ICOM aerial tuner.
But, is contrary to other anecdotal reports (from ham radio forums) regarding the Outback Flexmax 60/80...

a) If you could be so kind as to verify that model of Outback controller you have??

b) And, can you also verify that on your M-802, your normal background noise level (HF noise floor) on 7mhz and 8mhz bands is only one segment of illumination (or none) on the M-802 S-meter and no segments at all illuminated on any higher bands??
(This is typical / natural band noise....anything higher usually indicates on-board RFI..)


Sorry....but I've been a radio nut for a long time....and don't want to ruin my HF reception...



Thanks for all the help!
Fair winds

John
__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 16-08-2017, 13:46   #8
Registered User

Join Date: Mar 2014
Posts: 35
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

I have the Flexmax 80.

I will take a look at the weekend as I am not on board until then.
__________________
Ip485 is offline   Reply With Quote
Old 16-08-2017, 14:18   #9
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,026
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Ip485,
Thank You!
That would be great!

I'm not changing anything for a couple weeks...just doing the research first!

Thanks again!

John
__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 16-08-2017, 15:44   #10
Registered User

Join Date: Jan 2017
Posts: 1,659
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

Quote:
Originally Posted by ka4wja View Post
I just don't want to spend $$$$ on some new solar and ruin my HF set-up on-board.
Well make sure to only buy from sellers with a good NQA returns policy, or eBay, just out of pocket on return shipping.

Just have everything else ready to go for testing when it arrives.
__________________
john61ct is offline   Reply With Quote
Old 16-08-2017, 15:47   #11
Registered User
 
Viking Sailor's Avatar

Join Date: Nov 2006
Location: San Francisco Bay
Boat: Fantasia 35 - s/v Feeling Good
Posts: 1,046
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

John,

Why not use your status as the CF radio expert to get the solar controller manufacturers to provide you with samples of their products for review. I know you have a way with words -- so it shouldn't be to hard for you to make a creditable case for you doing such a review.

Luck,

Paul
__________________
Viking Sailor is offline   Reply With Quote
Old 16-08-2017, 17:04   #12
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,659
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

John,

I've got a BlueSky 2512 IX with an IPN Pro controller and it puts out a lot of RFI from .5 Mhz up to and including a unmodulated carrier exactly on VHF channel 16.

The 20 meter band gets about 6 to 7 S units of noise from the above mentioned equipment.

What am I doing wrong, or are you just lucky to have gotten one which is quiet?

Grrr...
__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is offline   Reply With Quote
Old 20-08-2017, 20:39   #13
Registered User

Join Date: Oct 2011
Location: East Coast, Canada
Boat: 15m Cat
Posts: 238
Re: High-voltage MPPT controller, that doesn't have a lot of HF RFI?? Anyone know?

I am also setting up my system, and planned on purchasing two of the morningstar mppt-45's. We'll also be using the m-802; so I'm watching, with interest, for any news on this thread.

Cheers.
Paul.
__________________

__________________
svquintana is offline   Reply With Quote
Reply

Tags
mppt

Thread Tools
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
Solar charge controller RFI RedHerring Electrical: Batteries, Generators & Solar 2 01-09-2016 03:19
Combining a diversion controller with a MPPT Solar controller GILow Electrical: Batteries, Generators & Solar 6 19-01-2016 04:45
Newbie with questions, I have a lot to learn, I know. SpeedsterX Powered Boats 68 01-11-2013 08:41


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:18.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.