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09-09-2019, 11:33 AM
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#1
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Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
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Victron MPPT solar controller installation
This is a basic wiring question, but I want to make sure I'm doing it right before I proceed. I have acquired a Victron solar controller. It has four terminals on the bottom; each is a socket with a set screw for tightening the wire that is inserted. Two terminals are for the battery connection and two are for power input from the solar panels.
I will have two pairs of wires from the panels to go into the controller: one pair from the rooftop panels and one pair from an SAE connector for a portable panel that I will install on the back of the trailer (when I work up the nerve). Can I insert, for example, the two positive wires from the solar panels and SAE connector into the "+" terminal and tighten them down with the set screw, or should I splice those two wires together outside of the controller then insert one wire into the controller's terminal? And if I need to splice the wires together, what is the best way to do it? Thanks.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
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09-09-2019, 11:39 AM
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#2
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Senior Member
Join Date: Feb 2010
Location: Oswego, New York
Trailer: 2017 Escape 21C, 2018 Ford F150
Posts: 5,370
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Quote:
Originally Posted by Mike Lewis
This is a basic wiring question, but I want to make sure I'm doing it right before I proceed. I have acquired a Victron solar controller. It has four terminals on the bottom; each is a socket with a set screw for tightening the wire that is inserted. Two terminals are for the battery connection and two are for power input from the solar panels.
I will have two pairs of wires from the panels to go into the controller: one pair from the rooftop panels and one pair from an SAE connector for a portable panel that I will install on the back of the trailer (when I work up the nerve). Can I insert, for example, the two positive wires from the solar panels and SAE connector into the "+" terminal and tighten them down with the set screw, or should I splice those two wires together outside of the controller then insert one wire into the controller's terminal? And if I need to splice the wires together, what is the best way to do it? Thanks.
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If both wires fit, put both under the Victron clamp. Be sure to check the polarity of the SAE connector since the color varies by manufacturer.
If they both don't fit, splice the two together and run an inch or two of the larger wire to the controller. I had to do this & made a soldered splice with heat shrink insulation.
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09-09-2019, 01:06 PM
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#3
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Senior Member
Join Date: Nov 2015
Location: Baytown, Texas
Trailer: 2017 21' Escape - upgraded version
Posts: 2,697
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Quote:
Originally Posted by Mike Lewis
This is a basic wiring question, but I want to make sure I'm doing it right before I proceed. I have acquired a Victron solar controller. It has four terminals on the bottom; each is a socket with a set screw for tightening the wire that is inserted. Two terminals are for the battery connection and two are for power input from the solar panels.
I will have two pairs of wires from the panels to go into the controller: one pair from the rooftop panels and one pair from an SAE connector for a portable panel that I will install on the back of the trailer (when I work up the nerve). Can I insert, for example, the two positive wires from the solar panels and SAE connector into the "+" terminal and tighten them down with the set screw, or should I splice those two wires together outside of the controller then insert one wire into the controller's terminal? And if I need to splice the wires together, what is the best way to do it? Thanks.
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I have two pair 8 gauge solar panel wires on the input terminals and one pair 6 gauge wires on the output terminals.
__________________
Normal people believe that if it ain't broke, don't fix it.
Engineers believe in fixing it so that it never breaks.
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09-09-2019, 01:42 PM
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#4
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Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
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Thanks.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
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09-09-2019, 05:11 PM
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#5
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Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
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Okay, I have another question, of course : There is a ground screw on the side of this thing. The instructions are unclear on how to ground the controller in an RV application, i.e. when you can't stick a ground rod into the ground. So how do you ground the controller? Thanks.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
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09-09-2019, 05:45 PM
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#6
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Senior Member
Join Date: Feb 2010
Location: Oswego, New York
Trailer: 2017 Escape 21C, 2018 Ford F150
Posts: 5,370
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Quote:
Originally Posted by Mike Lewis
Okay, I have another question, of course : There is a ground screw on the side of this thing. The instructions are unclear on how to ground the controller in an RV application, i.e. when you can't stick a ground rod into the ground. So how do you ground the controller? Thanks.
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I tied mine to the same wire that connects the inverter to the frame.
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09-09-2019, 06:35 PM
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#7
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Senior Member
Join Date: Nov 2015
Location: Baytown, Texas
Trailer: 2017 21' Escape - upgraded version
Posts: 2,697
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Quote:
Originally Posted by Vermilye
I tied mine to the same wire that connects the inverter to the frame.
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I connected mine to the converter negative terminal bar. It is also connected to the trailer frame.
__________________
Normal people believe that if it ain't broke, don't fix it.
Engineers believe in fixing it so that it never breaks.
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