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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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Spartan Power 600 Volt Quick Connect Disconnect Kits
$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99

Spartan Power 600 Volt Quick Connect Disconnect Kits - 120A 6 AWG

Spartan Power

The Spartan Power 600 Volt Quick Connect Disconnect Kits is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as...

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$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99
Spartan Power 600 Volt Quick Connect Disconnect Kits
$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99

Spartan Power 600 Volt Quick Connect Disconnect Kits - 120A 4 AWG

Spartan Power

The Spartan Power 600 Volt Quick Connect Disconnect Kits is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as...

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$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 60A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

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$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Tigo Automatic Transfer Switch (ATS)
$2,899.95 - $2,899.95
$2,899.95
$2,899.95 - $2,899.95
$2,899.95

Tigo Automatic Transfer Switch (ATS) - Tigo ATS 200A-G

Tigo Energy

The Tigo Automatic Transfer Switch (ATS) is a electrical component from Tigo Energy, supplied new and sold by Urban Supply Inc as an authorized dea...

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$2,899.95 - $2,899.95
$2,899.95
$2,899.95 - $2,899.95
$2,899.95
Tigo Automatic Transfer Switch (ATS)
$1,086.99 - $1,086.99
$1,086.99
$1,086.99 - $1,086.99
$1,086.99

Tigo Automatic Transfer Switch (ATS) - Tigo ATS 50A

Tigo Energy

The Tigo Automatic Transfer Switch (ATS) is a electrical component from Tigo Energy, supplied new and sold by Urban Supply Inc as an authorized dea...

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$1,086.99 - $1,086.99
$1,086.99
$1,086.99 - $1,086.99
$1,086.99
Tigo Automatic Transfer Switch (ATS)
$1,832.99 - $1,832.99
$1,832.99
$1,832.99 - $1,832.99
$1,832.99

Tigo Automatic Transfer Switch (ATS) - Tigo ATS 200A

Tigo Energy

The Tigo Automatic Transfer Switch (ATS) is a electrical component from Tigo Energy, supplied new and sold by Urban Supply Inc as an authorized dea...

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$1,832.99 - $1,832.99
$1,832.99
$1,832.99 - $1,832.99
$1,832.99
Victron Energy Busbar to Connect 5 and Connect 6
$38.25 - $38.25
$38.25
$38.25 - $38.25
$38.25

Victron Energy Busbar to Connect 5 and Connect 6 CIP100200100 Fuse Holders - Up To 5 (CIP100400060)

Victron Energy

The Victron Energy Busbar to Connect 5 and Connect 6 CIP100200100 Fuse Holders is a electrical component from Victron Energy, supplied new and sold...

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$38.25 - $38.25
$38.25
$38.25 - $38.25
$38.25
Victron Energy Busbar to Connect 5 and Connect 6
$45.05 - $45.05
$45.05
$45.05 - $45.05
$45.05

Victron Energy Busbar to Connect 5 and Connect 6 CIP100200100 Fuse Holders - Up To 6 (CIP100400070)

Victron Energy

The Victron Energy Busbar to Connect 5 and Connect 6 CIP100200100 Fuse Holders is a electrical component from Victron Energy, supplied new and sold...

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$45.05 - $45.05
$45.05
$45.05 - $45.05
$45.05
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - RED 100A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

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$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - RED 200A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

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$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - RED 150A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - RED 80A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - RED 200A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 200A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 200A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$13.12 - $13.12
$13.12
$13.12 - $13.12
$13.12

Spartan Power Small ANL Fuse Kits Black OR Red - RED SMALL FUSE HOLDER ONLY

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

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$13.12 - $13.12
$13.12
$13.12 - $13.12
$13.12
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - RED 100A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - RED 80A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 250A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - RED 250A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - RED 150A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 80A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00

Spartan Power Small ANL Fuse Kits Black OR Red - RED 250A KIT W/CABLE

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$27.00 - $27.00
$27.00
$27.00 - $27.00
$27.00
Spartan Power Small ANL Fuse Kits Black OR Red
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Spartan Power Small ANL Fuse Kits Black OR Red - BLACK 250A KIT

Spartan Power

The Spartan Power Small ANL Fuse Kits Black OR Red is a electrical component from Spartan Power, supplied new and sold by Urban Supply Inc as an au...

View full details
$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

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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