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Briggs & Stratton 50 A NEMA 4 Line Voltage Module for Symphony II Transfer Switch

$173
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(70 ratings)
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Customer reviews & Questions

Verified buyer reviews
Customer Reviews
  • Reviews (70)
  • Questions (4)
mia nelson
01/15/2025
keeps my electric dryer off till the fridge is steady, perfect load balance
GABRIELLE
09/09/2024
I love how quiet the switch is no buzz at all. Five stars.
SOPHIE WARD
02/21/2025
Is the module UL listed ?
A1 SolarStore
It is — independently tested and UL‑certified for safety and performance.
logan
01/09/2025
can I change the priority later
A1 SolarStore
Yes. Just pop the cover and move the DIP switches to Essential, Managed, or Deferred. No re‑wiring, no computer needed.
Elijah
12/15/2024
Whats that NEMA‑4 rating mean
A1 SolarStore
NEMA 4 means the steel enclosure blocks rain, dust, sleet, hose‑down water, and ice formation — so indoor or outdoor installs are both fine.
OLIVIA PEREZ
07/29/2024
Will this box work with my 20 kW Briggs & Stratton generator
A1 SolarStore
Absolutely. Any Briggs & Stratton standby set that uses a Symphony II transfer switch can pair with this 50 A line‑voltage module for smooth load management.

Specification

ManufacturerBriggs & Stratton
Manufacturer Part #071051
Warranty3 Year Limited

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About product

The Briggs & Stratton Symphony II Line Voltage Module brings intelligent, priority-based load management to your standby generator system. Rated for 50 A and protected by a rugged NEMA 4 enclosure, it lets your Symphony II transfer switch safely power high-demand appliances without overloading the generator.

  • 50 A high-voltage load-control module
  • Controls one 120/240 VAC single- or double-pole circuit (stove, dryer, pump, electric heat, etc.)
  • NEMA 4 rain-, dust-, and ice-resistant enclosure (indoor/outdoor)
  • Works exclusively with Briggs & Stratton Symphony II transfer switches and compatible standby generators
  • Priority-based logic balances generator capacity and prevents overloads
  • Plug-and-play: mounts near the appliance, uses existing branch-circuit wiring
  • Network up to eight modules per system for whole-house management
  • UL listed • 3-year limited warranty

Smart control for heavy loads

During an outage, Symphony II monitors generator output and automatically energizes the connected 50 A circuit according to its priority setting. Your critical or comfort appliances stay on without tripping breakers or stalling the generator.

Installs where the power is

The compact module mounts right next to the appliance disconnect. A single low-voltage communication cable links it to the transfer switch — no extra conduit or sub-panel space required.

Built to take the hit

A gasketed NEMA 4 cabinet seals out rain, dust, and hose-directed water, so the module can live in a garage, basement, or outdoors. Rugged electronics handle the inrush currents of motors and heating elements with ease.

Priority settings made simple

Set the DIP-switches to Essential, Managed, or Deferred; Symphony II queues loads accordingly, ensuring your generator never bogs down.

Electrical Ratings

Amperage: 50 A • Voltage/Phase: 120/240 VAC, 1φ • Poles: 1 or 2 • Enclosure: NEMA 4 • Listing: UL

Size

8.75'' x 5.5'' x 3''

Weight

4.4 lb

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  • Competitive Pricing: We offer the best prices because we source directly from the manufacturer, with no middlemen driving up costs.
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  • Overview
  • FAQ

Generator Accessories: Essential Upgrades for Uninterrupted Power

⚡ Key Takeaway: From battery warmers to smart transfer switches, generator accessories safeguard your investment, extend equipment life, and deliver hands-free, reliable power when the grid goes dark.

Why Generator Accessories Matter

Generators supply critical electricity during outages, but their performance hinges on a suite of supporting components. Battery and oil warmers ensure cold-weather starts, maintenance kits keep engines running at peak efficiency, and power management devices balance loads so smaller generators can handle bigger jobs. Automatic transfer switches (ATS) complete the ecosystem by shifting household circuits to generator power in seconds—no cords, no manual intervention.

Industry analysts value the global ATS market at $1.46 billion in 2024, with forecasts topping $1.75 billion by 2033

Key Generator Accessories

❄️ Battery Warmers

Insulated heating pads keep starter batteries between 40–55 °F so cranking amps don’t plummet in freezing weather—eliminating up to 60 % of cold-start failures.

🛠️ Maintenance Kits

OEM-matched kits bundle air and oil filters, spark plugs, engine oil, funnels, and shop towels, streamlining annual or 100-hour service and cutting unplanned downtime.

🌡️ Oil Warmers

Crank-case and oil-filter heaters prevent viscosity spikes that starve engines of lubrication, reducing wear and shortening warm-up times in sub-freezing climates.

⚙️ Power Management Modules

Smart relays prioritize heavy loads (HVAC, water heaters) and shed non-essentials, letting you run a lighter, more fuel-efficient generator without overload risk.

📊 Power Monitors

Wi-Fi-enabled monitors deliver real-time runtime hours, fault codes, and fuel levels to your phone—now a standard feature on many residential standby systems.

🔌 Transfer Switches

Automatic and manual ATS units isolate your home from the utility and switch designated circuits to generator power within seconds, eliminating dangerous back-feed and manual cord swaps.

Benefits of Accessorizing Your Generator

🔋 Reliability in Extreme Conditions

Battery oil warmers cut cold-start failures by as much as 80 % at −20 °F, ensuring your generator fires when you need it most.

💡 Smarter, Smaller Systems

With intelligent power management, homeowners often downsize one generator class—saving $500–$1,500 up front and reducing fuel consumption.

Installation & Maintenance Tips

⚙️ Proper Setup & Service

Install battery and oil heaters on a thermostat-controlled circuit; verify ATS amperage matches generator output and local code. Follow manufacturer service intervals—most air-cooled units need maintenance every 100–200 hours or annually, whichever comes first.

Cost Snapshot

  • Battery warmers: $100 – $250
  • Maintenance kits: $40 – $100
  • Oil warmers: $90 – $150
  • Power management modules: $300 – $600
  • Power monitors: $200 – $400
  • Automatic transfer switches: $400 – $2,000

Frequently Asked Questions

Do I need a battery warmer in a mild climate?

If winter temperatures rarely drop below 40 °F, a battery warmer is optional. However, if you experience occasional freezes, adding one protects against rare but critical cold-start failures.

How often should I change generator oil and filters?

Most manufacturers recommend service every 100 hours of runtime or once per year—whichever comes first. Always use the correct maintenance kit for your model.

Can I install a transfer switch myself?

Manual switches may be homeowner-installable in some jurisdictions, but automatic transfer switches usually require a licensed electrician to meet code and warranty requirements.

What’s the difference between a power monitor and a power management module?

A power monitor lets you view status and fault data, while a power management module actively controls and prioritizes loads to prevent generator overload.

Will accessories void my generator warranty?

Using manufacturer-approved accessories maintains warranty coverage. Third-party parts may be acceptable if they meet OEM specifications—check your warranty booklet.

Ready to Upgrade Your Generator System?

Browse our curated selection of battery warmers, maintenance kits, power management devices, and smart transfer switches to keep your generator running flawlessly, no matter the weather.

Shop Generator Accessories
What energy storage solutions does Briggs & Stratton offer?

They provide SimpliPHI® batteries, Sol-Ark® hybrid inverters, and AccESS™ integrated systems for residential and commercial energy storage.

How safe are Briggs & Stratton batteries?

Briggs & Stratton uses Lithium Ferro Phosphate (LFP) chemistry, known for its thermal stability and long lifespan, along with a Battery Management System (BMS) for monitoring.

Do Briggs & Stratton storage systems qualify for solar incentives?

Yes, they are eligible for the 30% Federal Solar Tax Credit (ITC) and may qualify for state and local rebates.

Are their products compatible with generators?

Yes, they can integrate with Briggs & Stratton standby generators and other third-party generators for hybrid power solutions.

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