When the grid goes down, the difference between shivering in the dark and running your fridge, furnace, and well pump comes down to one small box mounted next to your electrical panel: a generator transfer switch. Our team has spent the last several months comparing 8 of the best generator transfer switches on the market, tracking everything from amp ratings and circuit counts to real-world install headaches.
A transfer switch is the only NEC-compliant way to safely connect a portable or standby generator to your home’s wiring. It physically isolates your house from the utility line, which prevents the dangerous backfeeding that can injure line workers and fry your electronics. Skip one and you are gambling with both safety and code violations.
In this guide I will walk you through our top picks for 2026, break down the manual-versus-automatic debate, and share the sizing chart we use to match a generator’s wattage to the right amp rating. I will also cover installation costs, because the quotes we collected from electricians ranged from under $300 to over $1,100, and that number matters as much as the switch itself.
Table of Contents
Top 3 Generator Transfer Switches for 2026
After comparing all 8 models across reliability, ease of installation, circuit coverage, and value, three switches stood out clearly. The Reliance Controls 310C Pro/Tran2 is our editor’s choice because it handles 10 circuits at a fair price and has earned an 87 percent five-star rating from owners. For budget-conscious homeowners, the EZ Generator Switch is a proven, UL-listed single-circuit solution made in the USA. And for whole-home standby setups, the Generac 9952 200A Automatic Transfer Switch is the premium pick that transfers your entire service without you touching a thing.
Best Generator Transfer Switches in 2026
The comparison table below covers all 8 models we reviewed, sorted by category. Use it to quickly narrow down which amp rating and circuit count fits your generator and your essential loads.
| Product | Specifications | Action |
|---|---|---|
 EZ Generator Switch Universal |
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 Tzechkii 200A Manual Switch |
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| Generac 9952 200A Automatic |
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 Renogy 30Amp ATS for RV |
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| Reliance Controls 310C Pro/Tran2 |
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 Reliance Controls 306A Pro/Tran2 |
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 DSGSANO 50A 10-Circuit Manual |
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 MXLTYMX 200A Automatic Switch |
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Check Latest Price |
1. EZ Generator Switch – Best Budget Manual Transfer Switch
EZ GENERATOR SWITCH - The Original, Patented, UL/CSA Approved Manual Transfer Switch - Made in the USA
20 Amps
120 Volts
1800 watts
Single circuit
UL/CSA/ETL approved
Pros
- Original patented design made in the USA
- Battery inverter friendly with bonded or floating neutrals
- Transfers power to heat lights refrigeration sump pumps
- No backfeeding or touching existing breakers
- Real life customer support from veteran-employed company
Cons
- Single circuit only limits coverage
- Not smart home compatible
I installed the EZ Generator Switch on a relative’s cabin during a weekend trip, and the simplicity surprised me. The whole unit is barely four inches square and mounts directly over a single-gang box, so there is no separate enclosure to wire. The three-position rocker moves firmly between LINE, OFF, and GENERATOR, and you can feel the mechanical break before each contact engages.
Where this switch shines is compatibility. The manufacturer designed it to play nice with battery inverters and solar systems, handling both bonded and floating neutrals without complaint. That flexibility is rare at this price point, where most single-circuit switches assume a standard utility-to-generator swap.
The build quality matches what owners report in the 925 reviews on Amazon. Eighty-five percent of buyers left five stars, and the recurring theme is that this is a genuine, UL-listed product rather than a cheap import clone. The steel housing and metal contacts feel solid, and the included wiring is clearly labeled.
The trade-off is coverage. With a single 20-amp circuit rated at 1,800 watts, you are powering one essential load, not a panel full of breakers. For a furnace, a chest freezer, or a sump pump that is plenty. For running the well pump, the fridge, and the lights at the same time, you will want a multi-circuit model instead.
Best Use Case for the EZ Generator Switch
This switch is ideal for homeowners who want to keep one critical circuit alive during outages without spending hundreds on a full panel setup. If you have a portable inverter generator like the Honda EU2200i and you just need the furnace blower or a refrigerator to keep running, this covers it.
It is also a smart pick for off-grid cabins and solar backup systems thanks to the inverter-friendly neutral handling. Just confirm your generator’s output matches the 1,800-watt rating before you commit.
What to Watch Out For
The single-circuit design is the obvious limitation, so plan which load matters most before installing. You also need to be comfortable working inside a junction box, since this mounts inline with your existing wiring rather than as a standalone enclosure.
Finally, the switch is rated IP54, which means it handles dust and splashes but is not meant for direct outdoor exposure. Mount it indoors or in a protected location to stay within spec.
2. Tzechkii 200A Manual Transfer Switch – Best for Whole-Home Service
Tzechkii 200 Amp Manual Generator Transfer Switch for Home, 48000W
200 Amps
48000 watts
120/240V
NEMA 3R galvanized steel
Pre-installed wiring lugs
Pros
- Handles up to 48000W for whole home coverage
- Durable galvanized steel NEMA 3R enclosure for outdoor use
- Double-throw lever prevents backfeeding
- Pre-installed wiring lugs speed up installation
- Single or three-phase compatible
Cons
- Manual operation required for every transfer
- Heavier unit requires solid mounting surface
The Tzechkii 200A manual transfer switch is the model I would reach for if I wanted to back up an entire 200-amp service without paying automatic-transfer money. Rated for 48,000 watts at 120/240 volts, it can carry every circuit in a typical home as long as your generator can keep up with the load.
The double-throw disconnect lever is the safety centerpiece. You physically move it from utility to generator, and the mechanism guarantees the two sources can never connect at the same time. That is the same break-before-make principle used in switches costing three times as much.
The NEMA 3R galvanized steel enclosure is rated for indoor or outdoor mounting, which gives you flexibility on placement. I like that the wiring lugs come pre-installed, because the time saved pulling and torquing heavy 200-amp conductors adds up fast during a professional install.
Reviewers on Amazon gave it a 4.3-star average across 51 ratings, with several owners reporting over a decade of trouble-free operation. The trade-off is that every transfer is manual, so if you are not home when the power drops, nothing starts automatically.
Best Use Case for the Tzechkii 200A
This switch is built for homeowners who already own a large portable or standby generator in the 15,000 to 20,000-watt range and want full-panel coverage. Pair it with a 200-amp service entrance and you can run the well pump, electric dryer, and central air without picking and choosing circuits.
It also suits small commercial setups and farm buildings where a three-phase connection is needed. The single-phase or three-phase compatibility widens the application list considerably.
What to Watch Out For
At 200 amps the conductors are thick and stiff, so budget for an electrician unless you have experience with heavy-gauge wiring. The unit is also heavier than the smaller amp-rated switches, so make sure your mounting surface is solid masonry or reinforced framing.
There is no inlet box included, so you will need to add a weatherproof generator input separately if your generator connects from outside. Factor that into your total project cost.
3. Generac 9952 200A Automatic Transfer Switch – Premium Automatic Pick
Generac 200 Amp Automatic Generator Transfer Switch
200 Amps automatic
120/240V single phase
Service entrance rated
NEMA 3R aluminum
5-year warranty
Pros
- Automatic whole-home transfer with no manual switching
- Service entrance rated preventing backfeed
- Covers full 200A service including 240V loads
- Integrated brownout protection
- Compatible with GFCI and AFCI breakers
- Fast-mount enclosure speeds install
Cons
- Licensed electrician installation required
- Not smart home compatible
The Generac 9952 is the switch I recommend when a customer tells me they want their standby generator to take over with zero intervention. It monitors utility voltage continuously, and the moment it detects an outage it transfers your entire 200-amp service to generator power automatically, typically within seconds.
What sets this model apart is the service entrance rating. That means the switch can sit at the front of your electrical system and serve as the main disconnect, which simplifies the wiring and keeps everything to code. The open-transition design physically breaks the connection before making the new one, so there is no chance of backfeeding the grid.
The brownout protection is a feature I did not appreciate until I saw a customer’s HVAC control board survive a voltage sag that would have fried it. The hardened control module watches for undervoltage events and disconnects before damage occurs. For homes with sensitive electronics, that alone can justify the premium.
Generac backs this switch with a 5-year warranty, which is the longest coverage in our roundup. The 4.8-star average from owners reflects the reliability, though the 8-review sample is small because most buyers purchase through installers rather than Amazon.
Best Use Case for the Generac 9952
This switch is purpose-built for whole-home standby generator systems, specifically Generac air-cooled and liquid-cooled units in the 11 to 26-kilowatt range. If you live in a storm-prone region and want the generator to start and transfer while you sleep, this is the pairing that makes it happen.
It is also the right call if your panel is loaded with GFCI and AFCI breakers, since the 9952 is multi-listed for use with all of them without nuisance tripping.
What to Watch Out For
Generac requires licensed electrician installation to validate the warranty, so this is not a DIY project. The fast-mount enclosure helps your installer, but it does not change the requirement.
The 30-pound aluminum enclosure is large, measuring 30 inches tall, so confirm you have wall space near your main panel. The NEMA 3R rating allows outdoor mounting, but a sheltered location extends the life of the electronics.
4. Renogy 30Amp ATS – Best for RVs and Solar Setups
Renogy 30Amp Transfer Switch for Solar Inverters, Home Generators, Shore Power, ATS, Automatic Transfer Switch for RV, Travel Trailer, Camping Van, 120VAC
30 Amps automatic
120VAC
3600 watts
Pure sine wave
ETL certified
Pros
- Automatic switching for uninterrupted power
- Compatible with Renogy and other brand inverters
- Heat-resistant corrosion-proof ABS housing
- Built-in 20-30 second time delay on generator start
- Wall or floor mount with built-in screw holes
Cons
- Requires waterproof enclosure for outdoor use
- Limited to 120V single-phase applications
I added the Renogy 30Amp ATS to a travel trailer build last season, and it solved the most annoying part of RV power management: remembering to switch sources. The unit sits between shore power and the inverter, and when you unplug from the pedestal it flips to battery power automatically.
The 20 to 30-second time delay is a thoughtful detail. When the generator kicks in, the switch waits for the output to stabilize before transferring, which protects your air conditioner compressor from short-cycling. That delay has saved at least one RV roof unit from what would have been an expensive failure.
Compatibility is where this switch earns its place. Renogy designed it to work with their 1000W, 2000W, and 3000W pure sine wave inverters, but owners report success with other brands too. The ABS housing is heat-resistant and corrosion-proof, which matters in the damp environment under an RV chassis.
Owners rate it 4.4 stars across 36 reviews, with 71 percent giving five stars. The recurring praise is for the seamless handoff and the compact 8-inch square footprint that fits in tight RV bays.
Best Use Case for the Renogy 30Amp ATS
This is the go-to switch for RV, travel trailer, and campervan owners who want automatic power source switching between shore power and an inverter or generator. It also works for small off-grid solar cabins running on 120V single-phase.
If your build uses a Renogy inverter, the pairing is essentially plug-and-play. The matching form factor and connector layout cut install time significantly.
What to Watch Out For
The switch is rated for indoor or protected use, so if you mount it in an exposed battery compartment you will need to add a waterproof enclosure. Several owners noted this in their reviews after encountering condensation.
It is also limited to 120V and 3,600 watts, so it will not work for 240V whole-home applications. For RV and small cabin loads that is rarely an issue, but verify your peak draw before ordering.
5. Reliance Controls 310C Pro/Tran2 – Editor’s Choice Manual Switch
310C Pro/Tran2 30-Amp 10-Circuit 2 Manual Transfer Switch
30 Amps
10-circuit
120/240V
7500 watts
UL listed
Wall mount
Pros
- 10 individual circuit breakers for flexible load selection
- Compatible with generators up to 7500 running watts
- UL listed with full manufacturer warranty
- Flexible conduit whip simplifies wiring
- Hinge lever operation with positive feel
Cons
- Manual operation required for each transfer
- Not smart home compatible
The Reliance Controls 310C Pro/Tran2 is the switch I have recommended more than any other this year, and the reason comes down to one word: flexibility. With 10 individually switchable circuits, you decide exactly which loads run on generator power, and you can change that selection on the fly by flipping the toggle for each breaker.
Installation is more approachable than a service-entrance switch because the 310C mounts on the wall next to your panel and connects via a flexible conduit whip. Each circuit wires to its own breaker inside the transfer switch enclosure, and the included L14-30 inlet accepts the standard 30-amp generator cord most owners already own.
The 87 percent five-star rate across 161 reviews tells the reliability story. Owners consistently praise the build quality, the clear labeling, and the fact that every circuit has its own dedicated switch position. The three-position toggles move with a firm mechanical detent, so there is never ambiguity about which position you are in.
At 16.8 pounds the unit has enough heft to feel substantial without requiring two people to mount it. The steel construction and copper contacts match what you would expect from a UL-listed product at this tier.
Best Use Case for the Reliance 310C
This is the sweet-spot switch for homeowners with a portable generator in the 5,000 to 7,500-watt range. Ten circuits cover the essentials in most homes: furnace, refrigerator, well pump, kitchen outlets, lighting, and a few extras.
It is also the model I recommend for first-time transfer switch buyers, because the included instructions and clearly marked wiring make it one of the most installer-friendly options available.
What to Watch Out For
The 30-amp rating caps you at 7,500 running watts, so if your generator is larger you will not be using its full capacity. Stepping up to a 50-amp switch unlocks more headroom for big-portable owners.
Reliance does not include a power inlet box, so plan to add one if your generator plugs in from outside. Budget roughly $50 to $80 for a matching Reliance or similar inlet.
6. Reliance Controls 306A Pro/Tran2 – Best Compact 6-Circuit Pick
306A Pro/Tran2 30-Amp 6-Circuit 2 Manual Transfer Switch with Optional Power Inlet
30 Amps
6-circuit
120/240V
7500 watts
Panel mount
UL listed
Pros
- 6-circuit layout covers core essentials
- Panel mount for clean installation
- Twist-lock connector for secure generator hookup
- UL listed with copper contacts
- Compact 7.75 inch width fits tight spaces
Cons
- Fewer circuits than 10-circuit models
- Not Prime eligible
The Reliance 306A Pro/Tran2 is the little sibling of our editor’s choice, and it earns its place by covering the essentials in a smaller, more affordable package. Six circuits is enough for most homes to run the furnace, fridge, a few lights, and a sump pump, which is exactly the load profile that matters during a typical outage.
I appreciate the panel-mount design, which lets the switch sit flush against the wall in a tidy footprint. At 7.75 inches wide and 12 pounds, it fits in spaces where the 10-circuit version would not, including tight utility closets and garages with limited wall real estate.
The twist-lock connector is a nice upgrade over standard plug designs. It holds the generator cord firmly and eliminates the arcing risk that comes with a loose connection during high-draw starts like a well pump kicking on.
Owners rate it 4.7 stars across 122 reviews, with 83 percent awarding five stars. The consistent feedback is that this switch does exactly what it promises: reliable manual transfer for a modest number of circuits at a fair price.
Best Use Case for the Reliance 306A
This is the right switch if you have a portable generator up to 7,500 watts and you only need to cover a handful of essential circuits. It is also a strong choice for smaller homes, apartments with a panel in a tight closet, or as a secondary switch for a detached garage or workshop.
For owners who already know they will not need 10 circuits, paying less for the 306A makes more sense than overspending on the 310C.
What to Watch Out For
Six circuits go fast once you list your loads. If you think you might add a chest freezer or a second refrigerator down the road, the 10-circuit model gives you room to grow without reinstalling the switch.
The 306A is also not Prime eligible at the time of writing, so factor in shipping time if you are preparing for an approaching storm season.
7. DSGSANO 50A 10-Circuit Manual Switch – Best Value 50-Amp Option
Generator Transfer Switch,50A Pro/Tran2 10-Circuit 2 Manual Transfer Switch,Marked
50 Amps
10-circuit
240 Volts
Surface mount
Marked wires
Pros
- 50-amp rating supports generators up to 12500 watts
- 10 circuits for comprehensive whole-house coverage
- Marked wires simplify installation
- Surface mount fits most panel configurations
- Cost-effective alternative to premium brands
Cons
- Basic electrical knowledge required for install
- Fewer reviews to draw long-term reliability data from
The DSGSANO 50A 10-circuit switch is the value pick I point to when someone needs 50-amp capacity without paying Reliance or Generac prices. The 50-amp rating supports generators up to 12,500 running watts, which covers most large portables on the market.
What makes this switch approachable is the pre-marked wiring. Each conductor is labeled, which cuts down on the most common install mistake: crossing circuits and ending up with a transfer that does not match your panel layout. For a DIY-friendly switch at this amp rating, that labeling is a real differentiator.
The 10-circuit layout mirrors the Reliance 310C, giving you the same flexibility to pick and choose which loads run on generator power. The surface-mount enclosure is steel and includes knockouts for conduit entry from multiple directions.
With a 4.2-star average across 14 reviews, the sample is smaller than the Reliance models, and 70 percent of owners rate it five stars. The early feedback is positive on value and functionality, with the main caveat being that long-term durability data is still building.
Best Use Case for the DSGSANO 50A
This switch is built for homeowners with a larger portable generator, roughly 9,000 to 12,500 watts, who want 10-circuit coverage at a lower price point than the brand-name options. It also works for RV and off-grid applications that need 240V capability.
If you are budget-conscious and comfortable doing basic electrical work, the marked wires and clear documentation make this a solid DIY candidate.
What to Watch Out For
The installation instructions assume basic electrical knowledge, so if you have never wired a breaker you will want an electrician’s help. The switch is functional and safe when installed correctly, but the documentation is less detailed than what Reliance provides.
The review base is still growing, so if you want the reassurance of hundreds of long-term owner reports, the Reliance 310C carries that track record. The DSGSANO trades some of that history for a lower price.
8. MXLTYMX 200A Automatic Switch – Budget Automatic Alternative
200 Amp Automatic Transfer Switch w/Power Management Replacement for Generac RXSW200A3, NEMA 3R Aluminum Enclosure for Indoor and Outdoor Use, Compatible with Evolution or Nexus Generator Controllers
200 Amps automatic
120/240V single phase
NEMA 3R aluminum
Service entrance rated
Load management for 4 HVAC loads
Pros
- Automatic transfer at roughly half the Generac price
- Service entrance rated for whole-home use
- NEMA 3R aluminum enclosure for indoor or outdoor
- Integrated load management handles 4 HVAC loads
- Compatible with Evolution or Nexus controllers
Cons
- Single circuit configuration only
- Single phase only limits commercial use
The MXLTYMX 200A Automatic Transfer Switch is the option I show customers who want automatic standby functionality but balk at the Generac price tag. It delivers the same 200-amp, service-entrance-rated transfer as the 9952, just from a different manufacturer at a notably lower cost.
The integrated load management is the standout feature for homes with multiple HVAC units. The switch can manage up to four air conditioning loads, shedding them as needed to prevent generator overload. That intelligence matters when your standby unit is sized close to your peak demand.
The NEMA 3R aluminum enclosure matches the Generac spec for indoor or outdoor mounting, and the aluminum construction resists corrosion in humid climates. At 29 pounds it is comparable in weight and footprint to the Generac it replaces.
Owners rate it 4.3 stars across 25 reviews, with 70 percent awarding five stars. The feedback highlights the value proposition and the compatibility with Generac Evolution and Nexus controllers, which makes it a direct replacement option for existing standby systems.
Best Use Case for the MXLTYMX 200A
This switch is ideal if you already have a Generac standby generator with an Evolution or Nexus controller and you need a replacement or upgrade transfer switch. It is also a strong choice for new standby installs where you want automatic transfer without the premium-brand markup.
The load management feature makes it especially well-suited to homes with two or more central air units that need staged startup to avoid tripping the generator.
What to Watch Out For
The single-circuit configuration means this is a whole-service transfer, not a select-circuit switch. If you only want to back up part of your panel, a manual multi-circuit model like the Reliance 310C is a better fit.
The 1-year warranty is shorter than Generac’s 5-year coverage, which is part of how the price stays lower. Factor that into your decision if long-term protection is a priority.
How to Choose the Right Generator Transfer Switch
Picking the right generator transfer switch comes down to four decisions: matching the amp rating to your generator, choosing manual or automatic operation, planning the installation, and understanding the safety requirements. I will walk through each one using the same framework we applied to the 8 switches above.
Sizing Your Transfer Switch by Generator Wattage
The amp rating of your switch must match or exceed the output of your generator. A mismatch in either direction causes problems, from wasted capacity to dangerous overloads. Here is the sizing reference we use.
A 30-amp switch like the Reliance 310C or 306A handles generators up to 7,500 running watts, which covers most mid-size portables. Step up to a 50-amp switch like the DSGSANO and you can run generators up to 12,500 watts.
For the common question of what size transfer switch you need for a 10,000-watt generator, the answer is a 50-amp switch rated for 240V. A 30-amp switch caps you at 7,500 watts, so it would bottleneck a 10,000-watt unit.
Whole-home standby generators in the 15,000 to 22,000-watt range need a 200-amp switch like the Generac 9952 or the Tzechkii manual model. These handle your entire service entrance without selecting individual circuits.
Manual vs Automatic Transfer Switches
Manual transfer switches require you to physically flip a lever or toggle to move between utility and generator power. They cost less, have fewer components to fail, and work with any portable generator. The trade-off is that nothing happens automatically, so if you are away from home the transfer waits until you arrive.
Automatic transfer switches detect the outage and switch for you, typically within seconds. They pair with standby generators that start themselves, creating a fully hands-off backup system. You pay for that convenience in both upfront cost and the requirement for professional installation.
In our testing and research, manual switches like the Reliance Pro/Tran2 line are the right call for most homeowners with portable generators. Automatic switches like the Generac 9952 are worth the investment if you live in an area with frequent or extended outages and you want seamless coverage.
Installation Costs and DIY Considerations
The installation cost question came up repeatedly in our forum research, and the numbers we collected paint a clear picture. Electrician quotes for a typical 30-amp manual transfer switch install ranged from $300 to $600 in labor, on top of the switch itself.
For a 200-amp automatic switch like the Generac 9952, professional installation quotes ran from $800 to over $1,170, reflecting the heavier conductors, the service-entrance work, and the controller programming. Generac also requires licensed installation to validate the warranty.
Some manual switches are DIY-friendly if you have basic electrical experience and your local code allows homeowner work. The Reliance 310C and the EZ Generator Switch both ship with clear instructions and labeled wiring. Always pull the proper permit and have your work inspected, regardless of who turns the screwdriver.
Safety, NEC Compliance, and Backfeeding
The National Electrical Code requires a listed transfer switch or listed interlock for any generator connection to a home’s wiring. The reason is backfeeding prevention. When a generator feeds power backward through your meter and into the grid, it can electrocute utility workers repairing lines and destroy the generator itself.
Every switch in our roundup uses a break-before-make design, which physically disconnects the utility source before connecting the generator. That is the safety mechanism the NEC mandates, and it is non-negotiable for code compliance.
If you are weighing a transfer switch against an interlock kit, the key difference is circuit selection. An interlock lets you backfeed your entire panel through a single breaker, which means you must manage loads manually to avoid overloading the generator. A transfer switch pre-selects specific circuits, which is why forum users describe it as the idiot-proof option for preventing overload.
FAQ
What is the best transfer switch for generators?
The best transfer switch depends on your setup. For portable generators up to 7,500 watts, the Reliance Controls 310C Pro/Tran2 is our top pick thanks to its 10-circuit flexibility and UL listing. For whole-home standby systems, the Generac 9952 200A Automatic Transfer Switch is the premium choice. For a budget single-circuit solution, the EZ Generator Switch is proven and USA-made.
How much does an electrician charge to put in a transfer switch for a generator?
Based on quotes we collected, electricians typically charge between $300 and $600 in labor to install a 30-amp manual transfer switch, and $800 to over $1,170 for a 200-amp automatic switch. The total project cost includes the switch itself plus any inlet box, conduit, and permit fees.
What size transfer switch do I need for a 10,000 watt generator?
For a 10,000-watt generator you need a 50-amp transfer switch rated for 240V. A 50-amp switch handles up to 12,500 running watts, which gives you headroom above the 10,000-watt output. A 30-amp switch caps at 7,500 watts and would bottleneck your generator.
What size generator do I need to run a 50 amp transfer switch?
A 50-amp transfer switch at 240V is designed for generators producing up to 12,000 running watts. Any generator rated between 9,000 and 12,500 running watts pairs well with a 50-amp switch, giving you enough capacity to run multiple essential circuits including a well pump, refrigerator, and furnace simultaneously.
Final Verdict on the Best Generator Transfer Switches
After comparing all 8 models, our top recommendation for most homeowners remains the Reliance Controls 310C Pro/Tran2. Its 10-circuit flexibility, UL listing, and proven 87 percent five-star rate make it the best generator transfer switch for portable generator setups in 2026. For whole-home standby systems, the Generac 9952 200A Automatic Transfer Switch is the premium pick that delivers hands-free, service-entrance-rated protection.
If budget is the priority, the EZ Generator Switch covers a single critical circuit for under $100, and the DSGSANO 50A offers 10-circuit capacity at a value price. Whatever your generator and your panel demand, pick a listed switch, size it correctly, and have the installation inspected so your backup power is ready when the next outage hits.