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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 Cyrix-Li-ct 12/24V-230A Intelligent Li-ion
$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35

Victron Energy Cyrix-Li-ct 12/24V-230A Intelligent Li-ion Battery Combiner

Victron Energy

The Victron Energy Cyrix-Li-ct 12/24V-230A Intelligent Li-ion Battery Combiner is a victron energy battery isolators & combiners from Victron E...

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$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35
Victron Energy M8 Eyelet Connector for Blue Smart IP65
$12.75 - $12.75
$12.75
$12.75 - $12.75
$12.75

Victron Energy M8 Eyelet Connector for Blue Smart IP65 Charger (30 amp ATO fuse)

Victron Energy

The Victron Energy M8 Eyelet Connector for Blue Smart IP65 Charger (30 amp ATO fuse) is a electrical component from Victron Energy, supplied new an...

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$12.75 - $12.75
$12.75
$12.75 - $12.75
$12.75
Victron Energy Battery Indicator Eyelet (M8 Eyelet / 30A
$18.70 - $18.70
$18.70
$18.70 - $18.70
$18.70

Victron Energy Battery Indicator Eyelet (M8 Eyelet / 30A ATO fuse)

Victron Energy

The Victron Energy Battery Indicator Eyelet (M8 Eyelet / 30A ATO fuse) is a electrical component from Victron Energy, supplied new and sold by Urba...

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$18.70 - $18.70
$18.70
$18.70 - $18.70
$18.70
Victron Energy Battery Balancer
$48.45 - $48.45
$48.45
$48.45 - $48.45
$48.45

Victron Energy Battery Balancer

Victron Energy

The Victron Energy Battery Balancer is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized deale...

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$48.45 - $48.45
$48.45
$48.45 - $48.45
$48.45
Victron Energy VE.Direct to USB Interface
$30.60 - $30.60
$30.60
$30.60 - $30.60
$30.60

Victron Energy VE.Direct to USB Interface

Victron Energy

The Victron Energy VE.Direct to USB Interface is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an author...

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$30.60 - $30.60
$30.60
$30.60 - $30.60
$30.60
Victron Outdoor LTE-M Wall Mount Antenna
$51.85 - $51.85
$51.85
$51.85 - $51.85
$51.85

Victron Outdoor LTE-M Wall Mount Antenna

Victron Energy

The Victron Outdoor LTE-M Wall Mount Antenna is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authori...

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$51.85 - $51.85
$51.85
$51.85 - $51.85
$51.85
Victron VE Transfer Switch 10kVA, single phase, 200-250VAC
$440.30 - $440.30
$440.30
$440.30 - $440.30
$440.30

Victron VE Transfer Switch 10kVA, single phase, 200-250VAC

Victron Energy

The Victron VE Transfer Switch 10kVA, single phase, 200-250VAC is a electrical component from Victron Energy, supplied new and sold by Urban Supply...

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$440.30 - $440.30
$440.30
$440.30 - $440.30
$440.30
Victron Energy Shunt 500A/50mV SHU500050100
$22.10 - $22.10
$22.10
$22.10 - $22.10
$22.10

Victron Energy Shunt 500A/50mV SHU500050100

Victron Energy

The Victron Energy Shunt 500A/50mV SHU500050100 is a dc distribution systems & fuses from Victron Energy, supplied new and sold by Urban Supply...

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$22.10 - $22.10
$22.10
$22.10 - $22.10
$22.10
Victron VE.Can Resistive Tank Sender Adapter
$331.50 - $331.50
$331.50
$331.50 - $331.50
$331.50

Victron VE.Can Resistive Tank Sender Adapter

Victron Energy

The Victron VE.Can Resistive Tank Sender Adapter is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an aut...

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$331.50 - $331.50
$331.50
$331.50 - $331.50
$331.50
Victron Fuse 325A/80V for Lynx Shunt
$64.60 - $64.60
$64.60
$64.60 - $64.60
$64.60

Victron Fuse 325A/80V for Lynx Shunt

Victron Energy

The Victron Fuse 325A/80V for Lynx Shunt is a dc distribution systems & fuses from Victron Energy, supplied new and sold by Urban Supply Inc as...

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$64.60 - $64.60
$64.60
$64.60 - $64.60
$64.60
Victron Energy SolidSwitch 104
$39.10 - $39.10
$39.10
$39.10 - $39.10
$39.10

Victron Energy SolidSwitch 104

Victron Energy

The Victron Energy SolidSwitch 104 is a electrical component 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 M6 Eyelet Connector for Blue Smart IP65
$12.75 - $12.75
$12.75
$12.75 - $12.75
$12.75

Victron Energy M6 Eyelet Connector for Blue Smart IP65 Charger (30 amp ATO fuse)

Victron Energy

The Victron Energy M6 Eyelet Connector for Blue Smart IP65 Charger (30 amp ATO fuse) is a electrical component from Victron Energy, supplied new an...

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$12.75 - $12.75
$12.75
$12.75 - $12.75
$12.75
Victron Energy Outdoor 4G GSM Antenna Accessory
$29.75 - $29.75
$29.75
$29.75 - $29.75
$29.75

Victron Energy Outdoor 4G GSM Antenna Accessory

Victron Energy

The Victron Energy Outdoor 4G GSM Antenna Accessory is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an ...

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$29.75 - $29.75
$29.75
$29.75 - $29.75
$29.75
Victron Energy AC Current Sensor Single Phase MAX 40A
$49.30 - $49.30
$49.30
$49.30 - $49.30
$49.30

Victron Energy AC Current Sensor Single Phase MAX 40A

Victron Energy

The Victron Energy AC Current Sensor Single Phase MAX 40A is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc ...

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$49.30 - $49.30
$49.30
$49.30 - $49.30
$49.30
Victron VE.Bus BMS V2
$156.40 - $156.40
$156.40
$156.40 - $156.40
$156.40

Victron VE.Bus BMS V2

Victron Energy

The Victron VE.Bus BMS V2 is a victron battery monitors & system monitoring from Victron Energy, supplied new and sold by Urban Supply Inc as a...

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$156.40 - $156.40
$156.40
$156.40 - $156.40
$156.40
Victron Smart BMS 12/200
$232.90 - $232.90
$232.90
$232.90 - $232.90
$232.90

Victron Smart BMS 12/200

Victron Energy

The Victron Smart BMS 12/200 is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer with ...

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$232.90 - $232.90
$232.90
$232.90 - $232.90
$232.90
Victron Outdoor LTE-M Puck Antenna
$56.10 - $56.10
$56.10
$56.10 - $56.10
$56.10

Victron Outdoor LTE-M Puck Antenna

Victron Energy

The Victron Outdoor LTE-M Puck Antenna is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized de...

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$56.10 - $56.10
$56.10
$56.10 - $56.10
$56.10
Victron Energy Filax 2 Transfer Switch 110V/50Hz-120V/60Hz
$287.30 - $287.30
$287.30
$287.30 - $287.30
$287.30

Victron Energy Filax 2 Transfer Switch 110V/50Hz-120V/60Hz

Victron Energy

The Victron Energy Filax 2 Transfer Switch 110V/50Hz-120V/60Hz is a electrical component from Victron Energy, supplied new and sold by Urban Supply...

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$287.30 - $287.30
$287.30
$287.30 - $287.30
$287.30
Victron Cyrix Battery Combiner Kit
$96.90 - $96.90
$96.90
$96.90 - $96.90
$96.90

Victron Cyrix Battery Combiner Kit

Victron Energy

The Victron Cyrix Battery Combiner Kit is a victron energy battery isolators & combiners from Victron Energy, supplied new and sold by Urban Su...

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$96.90 - $96.90
$96.90
$96.90 - $96.90
$96.90
Victron Cyrix-Li-Load 12/24V-230A Intelligent Load Relay
$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35

Victron Cyrix-Li-Load 12/24V-230A Intelligent Load Relay

Victron Energy

The Victron Cyrix-Li-Load 12/24V-230A Intelligent Load Relay is a victron energy battery isolators & combiners from Victron Energy, supplied ne...

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$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35
Victron Cyrix-Li-charge 12/24V-230A Intelligent Charge Relay
$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35

Victron Cyrix-Li-charge 12/24V-230A Intelligent Charge Relay

Victron Energy

The Victron Cyrix-Li-charge 12/24V-230A Intelligent Charge Relay is a victron energy battery isolators & combiners from Victron Energy, supplie...

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$162.35 - $162.35
$162.35
$162.35 - $162.35
$162.35
Victron Energy Galvanic Isolator
$249.05 - $249.05
$249.05
$249.05 - $249.05
$249.05

Victron Energy Galvanic Isolator

Victron Energy

The Victron Energy Galvanic Isolator is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized deal...

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$249.05 - $249.05
$249.05
$249.05 - $249.05
$249.05
Victron Smart BMS CL 12/100
$166.60 - $166.60
$166.60
$166.60 - $166.60
$166.60

Victron Smart BMS CL 12/100

Victron Energy

The Victron Smart BMS CL 12/100 is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer wi...

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$166.60 - $166.60
$166.60
$166.60 - $166.60
$166.60
Victron Energy VE.Bus BMS
$117.30 - $117.30
$117.30
$117.30 - $117.30
$117.30

Victron Energy VE.Bus BMS

Victron Energy

The Victron Energy VE.Bus BMS is a electrical component from Victron Energy, supplied new and sold by Urban Supply Inc as an authorized dealer with...

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$117.30 - $117.30
$117.30
$117.30 - $117.30
$117.30

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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