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Solar Disconnects & Transfer Switches

The balance of system is where solar installations pass or fail inspection. Transfer switches, disconnects, breakers and busbars are what let an inspector see a safe, code-compliant path from array to panel, and they are the parts most DIY builds under-specify.

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Victron Energy MIDI-Fuse Holder and Fuses
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 80A/58V-M6 (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30
Victron Energy Autotransformer 32A, 50A, & 100A 120/240V
$451.35 - $451.35
$451.35
$451.35 - $451.35
$451.35

Victron Energy Autotransformer 32A, 50A, & 100A 120/240V - 50A Autotransformer

Victron Energy

The Victron Energy Autotransformer 32A, 50A, & 100A 120/240V is a electrical component from Victron Energy, supplied new and sold by Urban Supp...

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$451.35 - $451.35
$451.35
$451.35 - $451.35
$451.35
Victron Energy MIDI-Fuse Holder and Fuses
$4.25 - $4.25
$4.25
$4.25 - $4.25
$4.25

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 50A/58V (1 pc)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$4.25 - $4.25
$4.25
$4.25 - $4.25
$4.25
Victron Energy ANL-fuse
$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80

Victron Energy ANL-fuse - 500A/80V (5 Pack)

Victron Energy

The Victron Energy ANL-fuse is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer with U...

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$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80
Victron MK3-USB-C Interface (VE.Bus)
$65.45 - $65.45
$65.45
$65.45 - $65.45
$65.45

Victron Interface MK3-USB-C (VE.Bus to USB-C)

Victron Energy
In stock

Key Features VE.Bus-to-USB-C interface for VE.Bus configuration, firmware, and diagnostics Works with VictronConnect and VEConfigure on Windows, m...

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$65.45 - $65.45
$65.45
$65.45 - $65.45
$65.45
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 250A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

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$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 200A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

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$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy ANL-fuse
$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80

Victron Energy ANL-fuse - 400A/80V (5 Pack)

Victron Energy

The Victron Energy ANL-fuse is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer with U...

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$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80
Victron Energy MIDI-Fuse Holder and Fuses
$9.35 - $9.35
$9.35
$9.35 - $9.35
$9.35

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 100A/32V (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$9.35 - $9.35
$9.35
$9.35 - $9.35
$9.35
Victron Energy MIDI-Fuse Holder and Fuses
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 30A/58V-M6 (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30
Victron Energy MIDI-Fuse Holder and Fuses
$11.90 - $11.90
$11.90
$11.90 - $11.90
$11.90

Victron Energy MIDI-Fuse Holder and Fuses

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

View full details
$11.90 - $11.90
$11.90
$11.90 - $11.90
$11.90
Victron Energy MIDI-Fuse Holder and Fuses
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 100A/58V-M6 (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

View full details
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 500A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MIDI-Fuse Holder and Fuses
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 40A/58V-M6 (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 225A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 175A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 125A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy ANL-fuse
$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80

Victron Energy ANL-fuse - 300A/80V (5 Pack)

Victron Energy

The Victron Energy ANL-fuse is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer with U...

View full details
$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80
Victron Argo Diode Battery Combiners 40A & 80A
$45.05 - $45.05
$45.05
$45.05 - $45.05
$45.05

Victron Argo Diode Battery Combiners 40A & 80A - BCD 802 2 batteries 80A (combiner diode)

Victron Energy

The Victron Argo Diode Battery Combiners 40A & 80A is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as ...

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$45.05 - $45.05
$45.05
$45.05 - $45.05
$45.05
Victron Energy MIDI-Fuse Holder and Fuses
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 60A/58V-M6 (5 pcs)

Victron Energy

The Victron Energy MIDI-Fuse Holder and Fuses is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

View full details
$15.30 - $15.30
$15.30
$15.30 - $15.30
$15.30
Victron Argo Diode Battery Combiners 40A & 80A
$36.55 - $36.55
$36.55
$36.55 - $36.55
$36.55

Victron Argo Diode Battery Combiners 40A & 80A - BCD 402 2 batteries 40A (combiner diode)

Victron Energy

The Victron Argo Diode Battery Combiners 40A & 80A is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as ...

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$36.55 - $36.55
$36.55
$36.55 - $36.55
$36.55
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 60A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 150A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Energy MEGA Fuses - Fuse Holder
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy MEGA Fuses - Fuse Holder - MEGA-fuse 100A/80V (package of 5 pcs)

Victron Energy

The Victron Energy MEGA Fuses - Fuse Holder is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authoriz...

View full details
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

How to Choose

Size on current and voltage, with margin. DC breakers and disconnects must be rated for DC — an AC-rated breaker will not interrupt a DC arc and is a fire risk, not merely a code violation. Transfer switches are chosen by service size, most commonly 200A for a US home, and by whether you need automatic or manual operation: automatic costs more but means the house recovers without anyone being home. Busbars are sized by total current, and it is worth buying more capacity than you need now so the next battery does not force a rebuild.

Key Specifications Explained

  • DC rating: Breakers and disconnects must be DC-rated, not AC-rated
  • Transfer switch: 200A is standard for a US residential service; automatic or manual
  • Busbars: Rated up to 600A; size for future capacity, not today's load
  • Load centers: Pre-wired balance of system saves a day of enclosure fabrication
  • Listing: UL 67, UL 489 and UL 1008 depending on device class

Brands We Carry

EG4 Electronics, Eaton, Growatt, Tigo Energy, OutBack Power, MidNite Solar, Schneider Electric and IMO Solar.

Frequently Asked Questions

Can I use an AC breaker on the DC side?

No. DC arcs do not self-extinguish at a zero crossing the way AC does. Use DC-rated devices on every DC circuit, without exception.

Automatic or manual transfer switch?

Automatic if the house needs to recover with nobody home — refrigeration, sump pumps, medical equipment. Manual is cheaper and fine for a cabin.

What size busbar?

Total the maximum current of everything landing on it, then step up a size. Busbars are cheap; rebuilding a battery enclosure is not.

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