Transfer Switches & Connection

The Best 50 Amp Transfer Switches

You need one if your generator exceeds about 7,500 running watts. It raises the cost of every other part of the connection too.

Written byMike M.

PublishedOctober 5, 2026

Disclosure: we earn a commission on purchases made through links on this page, at no cost to you. It does not affect what we recommend or what we say about it — how we are funded.

The short answer

Connecticut Electric's EmerGen EGS1012KG2 is the best 50 amp transfer switch: 10 circuits, 12,500 watts, with a CS6375 inlet box and the cord included in one purchase — which removes the connector-mismatch risk that makes 50 amp installations expensive to get wrong. Champion's 201193 is UL 1008 certified with a 30-foot cord. You need 50 amps if your generator exceeds roughly 7,500 running watts; below that, a 30 amp switch costs less across the whole chain.

A 50 amp switch passes about 12,000 watts at 240 volts against a 30 amp switch's 7,200. That is the entire reason to buy one, and it is a reason that only applies to a specific set of generators.

Do you actually need 50 amps?

The test

Generator under 7,500 running watts: 30 A is correct
7,500 - 12,000 running watts: 50 A, to use what you bought
Over 12,000 running watts: 50 A is itself the cap

Arithmetic from the amp ratings. Reliance states a 7,500 maximum running watt generator ceiling for its 30 amp kit, which matches the calculation.

So the honest advice runs both ways. If your generator is a 6,500 running-watt machine, buying 50 amps is money spent on capacity that does not exist. If it is a 9,500 or 10,500 running-watt machine, buying 30 amps strands 2,000-3,000 watts you already paid for.

Work out your load first with the calculator. A surprising number of people discover they should have bought a smaller generator and a 30 amp switch, which is cheaper on both counts.

The short answer

Quick picks

#	Product	Best for	Score	Price
1	Connecticut Electric EmerGen EGS1012KG2 50A 10-Circuit The simplest way to do a 50 A installation correctly: everything matched in one box, including the cord people most often get wrong.	50A kit with inlet and cord	9.0/10	$379.99
2	Champion 201193 50A 10-Circuit with Cord The most completely specified 50 A package: UL 1008, prewired, with a cord long enough to site the generator safely.	UL 1008 certified with a 30 ft cord	9.0/10	$610.72
3	Reliance Controls A510A Pro/Tran2 10-Circuit 50A Buy this only if your generator genuinely exceeds 7,500 running watts — then it is the switch that lets you actually use what you paid for.	Using a big generator's full output	8.8/10	$524.00

#ad Prices as of October 5, 2026; they may have changed since. Scores are our editorial judgment from published specifications, not test results — how we pick. How we are funded.

The 50 amp upgrade costs more than the switch

This is the part people underestimate. Going from 30 to 50 amps raises every line of the installation:

Component	At 30 A	At 50 A
Transfer switch	Lower cost	Higher
Inlet box	Lower cost	Higher
Cord	10 AWG	6/3 + 8/1 AWG — much heavier and dearer
Feeder conductors	Smaller	Larger, more labor
Electrician time	Less	More

Conductor gauges are from manufacturer listings (VEVOR publishes 6/3 + 8/1 AWG for its 50 A cord against 10 AWG for its 30 A). We do not quote prices in text, because they move; every price on this site is live and dated.

Which is why the complete kits rank at the top of this list. Connecticut Electric's EGS1012KG2 includes the switch, a CS6375 inlet box with weather-resistant cover, and a generator cord — all matched. At 50 amps, where 14-50, SS2-50 and CS6375 connectors are easy to confuse and expensive to replace, that removes the single most common ordering error.

Champion's UL 1008 certification and 30-foot cord

Champion's 201193 publishes two things worth paying attention to. It is UL 1008 certified, which is the safety standard specific to transfer switch equipment and the one inspectors look for — most listings in this category do not state a certification at all.

And it includes a 30-foot cord. That is not a convenience: CPSC guidance puts the generator at least 20 feet from the house, and 30 feet gives genuine room to site it well away from doors and windows. Many bundled cords are 25 feet or less.

It is also prewired with labeled conductors, which Champion states makes installation faster and less costly. Its limitation is that it is indoor rated, so the switch has to live in a garage or basement rather than on an exterior wall.

What 50 amps and ten circuits lets you include

The practical difference, using EWEB's published figures: at 30 amps and 7,200 watts you are choosing between a well pump and a window air conditioner. At 50 amps and 12,000 watts you can have both.

A 50 amp circuit list

Refrigerator: 700 W
Furnace blower: 700 W
Well pump: 1,000 W
Sump pump: 1,050 W
Window AC, 12,000 BTU: 3,250 W
Kitchen outlets: ~1,000 W
Lighting x2: ~300 W
Total running: ~8,000 W

EWEB published running-watt figures. That total fits inside a 50 amp switch's 12,000 watt ceiling with headroom, and does not fit inside a 30 amp switch's 7,200 watts.

Note also that Connecticut Electric's EGS1012KG2 publishes specialized switching for 240 volt applications, which is what you need for a well pump or an electric range rather than only 120 volt circuits.

Connecticut Electric EmerGen EGS1012KG2 50A 10-Circuit

Circuits: 10
Rating: 50 A / 12,500 W
Includes: Inlet box + cord

#1 · 50A kit with inlet and cord

Connecticut Electric EmerGen EGS1012KG2 50A 10-Circuit

9.0/10

The simplest way to do a 50 A installation correctly: everything matched in one box, including the cord people most often get wrong.

$379.99View on Amazon

#ad Price as of October 5, 2026; it may have changed since. How we are funded.

What is good

Switch, 50 A inlet box AND cord in one purchase — this is the only complete 50 A package here, and it removes every connector-mismatch risk
12,500 W pass-through matches the biggest portable generators
Explicit 240 V circuit switching for a well pump or a range

What is not

The bundled cord's length is fixed — check it reaches from where the generator will actually sit
Connecticut Electric is less familiar to some electricians than Reliance
50 A install means heavier wire and a bigger bill

Published specification & our scoring

50 A, 10-circuit, 12,500 W manual transfer switch (manufacturer)
Specialized switching for 240 V applications (manufacturer)
Includes a 50 A power inlet box (CS6375) with a weather-resistant cover and a generator cord (manufacturer)
Designed for residential or small-business use

Circuit coverage: 9
Capacity: 10
Completeness: 10
Brand familiarity: 7
Value: 9

Specification figures are the manufacturer’s published values. Scores are our editorial judgment from those figures and are never published as structured review data — how we pick.

Champion 201193 50A 10-Circuit with Cord

Circuits: 10
Rating: 50 A, UL 1008
Cord: 30 ft included

#2 · UL 1008 certified with a 30 ft cord

Champion 201193 50A 10-Circuit with Cord

9.0/10

The most completely specified 50 A package: UL 1008, prewired, with a cord long enough to site the generator safely.

$610.72View on Amazon

#ad Price as of October 5, 2026; it may have changed since. How we are funded.

What is good

UL 1008 is the transfer-switch standard inspectors look for, and Champion states the certification explicitly
30 feet of cord is enough to get the generator a genuinely safe distance from the house
Prewired labeled conductors cut install time, which is the expensive part

What is not

Indoor rated only — the switch has to live in a garage or basement, not on an exterior wall
The most expensive switch here
50 A install cost

Published specification & our scoring

50 A manual transfer switch, 10 circuits, indoor rated and UL 1008 certified (manufacturer)
30-foot generator power cord and a weather-resistant power inlet box included (manufacturer)
Prewired with labeled wires — manufacturer states this makes installation faster and less costly
Powers hard-wired circuits with no extension cords needed

Circuit coverage: 9
Capacity: 10
Certification: 10
Completeness: 10
Value: 7

Specification figures are the manufacturer’s published values. Scores are our editorial judgment from those figures and are never published as structured review data — how we pick.

Reliance Controls A510A Pro/Tran2 10-Circuit 50A

Circuits: 10
Rating: 50 A
Inlet: Optional

#3 · Using a big generator's full output

Reliance Controls A510A Pro/Tran2 10-Circuit 50A

8.8/10

Buy this only if your generator genuinely exceeds 7,500 running watts — then it is the switch that lets you actually use what you paid for.

$524.00View on Amazon

#ad Price as of October 5, 2026; it may have changed since. How we are funded.

What is good

50 A at 240 V is roughly 12,000 W — enough to pass through everything a 9,500 to 11,500 running-watt generator produces
Ten circuits at 50 A is the configuration that lets you include a well pump and a furnace without rationing
If you bought a 10,000 W-plus generator, this is the switch that stops you wasting it

What is not

Needs a 50 A cord and a 50 A inlet, both of which cost appreciably more than their 30 A equivalents
More expensive install: heavier conductors throughout
Pointless with a generator under about 7,500 running watts

Published specification & our scoring

Pro/Tran2 50 A, 10-circuit manual transfer switch (manufacturer)
Optional power inlet (manufacturer)
Full manufacturer warranty

Circuit coverage: 9
Capacity: 10
Brand familiarity: 10
Install clarity: 8
Value: 7

Specification figures are the manufacturer’s published values. Scores are our editorial judgment from those figures and are never published as structured review data — how we pick.

Questions people actually ask

Do I need a 50 amp transfer switch?

Only if your generator exceeds roughly 7,500 running watts. A 30 amp switch passes about 7,200 watts at 240 volts, so a larger generator strands capacity you paid for. Below that figure, 50 amps is money spent on capacity that does not exist.

What is the best 50 amp transfer switch?

Connecticut Electric's EmerGen EGS1012KG2: 10 circuits, 12,500 watts, with a CS6375 inlet box and the cord included and matched. Champion's 201193 is the alternative, UL 1008 certified with a 30-foot cord and prewired labeled conductors.

How much more does a 50 amp installation cost than 30 amp?

More across every line: the switch, the inlet box, the cord (6/3 plus 8/1 AWG against 10 AWG), the feeder conductors and the electrician's time. We do not quote figures in text because prices move, but it is a meaningful step up rather than a small premium.

How many watts can a 50 amp transfer switch handle?

About 12,000 watts at 240 volts. Connecticut Electric rates its EmerGen 50 amp kit at 12,500 watts. That is enough to pass everything the largest portable generators produce.

What does UL 1008 mean on a transfer switch?

It is the safety standard specific to transfer switch equipment and the one inspectors look for. Champion states UL 1008 certification on its 50 amp unit; most listings in this category state no certification at all, which is worth asking your electrician about.

Can a 50 amp transfer switch work with a 30 amp generator?

Yes, electrically — the switch is a ceiling, not a requirement — but you would be paying for a 50 amp installation across cord, inlet and conductors to carry 30 amps. If your generator is 30 amp, buy the 30 amp chain.