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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 Argodiode Battery Isolators
$50.15 - $50.15
$50.15
$50.15 - $50.15
$50.15

Victron Argodiode Battery Isolators - 80-2AC 2

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$50.15 - $50.15
$50.15
$50.15 - $50.15
$50.15
Victron Smart Battery Protect 65A 100A & 220A Bluetooth
$53.55 - $53.55
$53.55
$53.55 - $53.55
$53.55

Victron Smart Battery Protect 65A 100A & 220A Bluetooth - 12-24V 65A Smart Battery Protect

Victron Energy

The Victron Smart Battery Protect 65A 100A & 220A Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc...

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$53.55 - $53.55
$53.55
$53.55 - $53.55
$53.55
Victron Argodiode Battery Isolators
$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00

Victron Argodiode Battery Isolators - 100-3AC 3

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00
Victron ArgoFET Battery Isolators
$100.30 - $100.30
$100.30
$100.30 - $100.30
$100.30

Victron ArgoFET Battery Isolators - Argofet 100-2 Two batteries 100A

Victron Energy

The Victron ArgoFET Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer w...

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$100.30 - $100.30
$100.30
$100.30 - $100.30
$100.30
Victron Argodiode Battery Isolators
$39.10 - $39.10
$39.10
$39.10 - $39.10
$39.10

Victron Argodiode Battery Isolators - 80-2SC 2

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$39.10 - $39.10
$39.10
$39.10 - $39.10
$39.10
Victron Energy 12-Volt MagCode Power Clip (max 15 amp)
$59.50 - $59.50
$59.50
$59.50 - $59.50
$59.50

Victron Energy 12-Volt MagCode Power Clip (max 15 amp)

Victron Energy

The Victron Energy 12-Volt MagCode Power Clip (max 15 amp) is a victron energy product accessories from Victron Energy, supplied new and sold by Ur...

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$59.50 - $59.50
$59.50
$59.50 - $59.50
$59.50
Victron ArgoFET Battery Isolators
$114.75 - $114.75
$114.75
$114.75 - $114.75
$114.75

Victron ArgoFET Battery Isolators - Argofet 100-3 Three batteries 100A

Victron Energy

The Victron ArgoFET Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer w...

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$114.75 - $114.75
$114.75
$114.75 - $114.75
$114.75
Victron Argodiode Battery Isolators
$90.10 - $90.10
$90.10
$90.10 - $90.10
$90.10

Victron Argodiode Battery Isolators - 160-2AC 2

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$90.10 - $90.10
$90.10
$90.10 - $90.10
$90.10
Victron Smart Battery Protect 65A 100A & 220A Bluetooth
$105.40 - $105.40
$105.40
$105.40 - $105.40
$105.40

Victron Smart Battery Protect 65A 100A & 220A Bluetooth - 12-24V 220A Smart Battery Protect

Victron Energy

The Victron Smart Battery Protect 65A 100A & 220A Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc...

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$105.40 - $105.40
$105.40
$105.40 - $105.40
$105.40
Victron Battery Protect 65A 100A & 220A Non-Bluetooth
$36.55 - $36.55
$36.55
$36.55 - $36.55
$36.55

Victron Battery Protect 65A 100A & 220A Non-Bluetooth - 12/24V-65A

Victron Energy

The Victron Battery Protect 65A 100A & 220A Non-Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc a...

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$36.55 - $36.55
$36.55
$36.55 - $36.55
$36.55
Victron Argodiode Battery Isolators
$75.65 - $75.65
$75.65
$75.65 - $75.65
$75.65

Victron Argodiode Battery Isolators - 120-2AC 2

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$75.65 - $75.65
$75.65
$75.65 - $75.65
$75.65
Victron Argodiode Battery Isolators
$109.65 - $109.65
$109.65
$109.65 - $109.65
$109.65

Victron Argodiode Battery Isolators - 180-3AC 3

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

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$109.65 - $109.65
$109.65
$109.65 - $109.65
$109.65
Victron Smart Battery Protect 65A 100A & 220A Bluetooth
$137.70 - $137.70
$137.70
$137.70 - $137.70
$137.70

Victron Smart Battery Protect 65A 100A & 220A Bluetooth - 48V 100A Smart Battery Protect

Victron Energy

The Victron Smart Battery Protect 65A 100A & 220A Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc...

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$137.70 - $137.70
$137.70
$137.70 - $137.70
$137.70
Victron Smart Battery Protect 65A 100A & 220A Bluetooth
$70.55 - $70.55
$70.55
$70.55 - $70.55
$70.55

Victron Smart Battery Protect 65A 100A & 220A Bluetooth - 12-24V 100A Smart Battery Protect

Victron Energy

The Victron Smart Battery Protect 65A 100A & 220A Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc...

View full details
$70.55 - $70.55
$70.55
$70.55 - $70.55
$70.55
Victron Energy 12-Volt MagCode Power Port (max 15 amp)
$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75

Victron Energy 12-Volt MagCode Power Port (max 15 amp)

Victron Energy

The Victron Energy 12-Volt MagCode Power Port (max 15 amp) is a victron energy product accessories from Victron Energy, supplied new and sold by Ur...

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$46.75 - $46.75
$46.75
$46.75 - $46.75
$46.75
Victron Battery Protect 65A 100A & 220A Non-Bluetooth
$119.85 - $119.85
$119.85
$119.85 - $119.85
$119.85

Victron Battery Protect 65A 100A & 220A Non-Bluetooth - 48V-100A

Victron Energy

The Victron Battery Protect 65A 100A & 220A Non-Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc a...

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$119.85 - $119.85
$119.85
$119.85 - $119.85
$119.85
Victron ArgoFET Battery Isolators
$140.25 - $140.25
$140.25
$140.25 - $140.25
$140.25

Victron ArgoFET Battery Isolators - Argofet 200-3 Three batteries 200A

Victron Energy

The Victron ArgoFET Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer w...

View full details
$140.25 - $140.25
$140.25
$140.25 - $140.25
$140.25
Victron Battery Protect 65A 100A & 220A Non-Bluetooth
$53.55 - $53.55
$53.55
$53.55 - $53.55
$53.55

Victron Battery Protect 65A 100A & 220A Non-Bluetooth - 12/24V-100A

Victron Energy

The Victron Battery Protect 65A 100A & 220A Non-Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc a...

View full details
$53.55 - $53.55
$53.55
$53.55 - $53.55
$53.55
Victron Argodiode Battery Isolators
$95.20 - $95.20
$95.20
$95.20 - $95.20
$95.20

Victron Argodiode Battery Isolators - 140-3AC 3

Victron Energy

The Victron Argodiode Battery Isolators is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer...

View full details
$95.20 - $95.20
$95.20
$95.20 - $95.20
$95.20
Victron Battery Protect 65A 100A & 220A Non-Bluetooth
$87.55 - $87.55
$87.55
$87.55 - $87.55
$87.55

Victron Battery Protect 65A 100A & 220A Non-Bluetooth - 12/24V-220A

Victron Energy

The Victron Battery Protect 65A 100A & 220A Non-Bluetooth is a power equipment from Victron Energy, supplied new and sold by Urban Supply Inc a...

View full details
$87.55 - $87.55
$87.55
$87.55 - $87.55
$87.55
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 200A/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 50A/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
$9.35 - $9.35
$9.35
$9.35 - $9.35
$9.35

Victron Energy MIDI-Fuse Holder and Fuses - MIDI-fuse 125A/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 MK3-USB Interface (VE.Bus)
$75.65 - $75.65
$75.65
$75.65 - $75.65
$75.65

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

Victron Energy
In stock

Key Features VE.Bus-to-USB interface for local configuration, diagnostics, and firmware updates Compatible with MultiPlus, Quattro, EasySolar, and...

View full details
$75.65 - $75.65
$75.65
$75.65 - $75.65
$75.65

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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