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Briggs & Stratton 50 A NEMA 4 Dual Low Voltage Module for Symphony II Transfer Switch
$148
Strong buyer interest
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- SpecificationCompareSee all
Customer reviews & Questions
Verified buyer reviews
- Reviews (70)
- Questions (4)
owen
07/24/2025
owned a year zero hiccups five big stars
PENELOPE FOSTER
12/06/2024
Heat pump and upstairs AC both happy zero overloads.
CLAIRE
06/08/2025
Can I paint it tan??
A1 SolarStorenathaniel
12/09/2024
do i need a subpanel?
A1 SolarStorejayden bell
11/22/2024
standby draw wattage
A1 SolarStoreMADISON
07/31/2024
Will this box run two ACs at once
A1 SolarStoreSpecification
| Manufacturer | Briggs & Stratton |
| Manufacturer Part # | 071053 |
| Warranty | 3 Year Limited |
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About product
The Briggs & Stratton Symphony II Dual Low‑Voltage Module gives your standby generator the brains to juggle two thermostat‑controlled loads — like a pair of central A/C units or a heat pump — without maxing out capacity. Rated at 50 A and sealed in a weather‑tight NEMA 4 enclosure, it keeps comfort systems running smoothly when the grid goes dark.
- 50 A dual‑channel low‑voltage load‑management module
- Controls two independent 120 V thermostat circuits (two A/C condensers, dual‑stage heat pump, etc.)
- NEMA 4 rain‑, dust‑, and ice‑resistant plastic enclosure — indoor/outdoor safe
- Engineered exclusively for Briggs & Stratton Symphony II transfer switches and compatible generators
- Priority‑based logic sheds and restores loads to prevent generator overloads
- Daisy‑chain up to eight modules per system for whole‑house management
- 18 AWG plug‑and‑play control wiring; mounts right at the HVAC equipment
- UL listed • 3‑year limited warranty
Smart cooling for two zones
During an outage, Symphony II continuously watches generator output and stages each connected A/C or heat‑pump circuit only when there’s headroom — so both zones stay comfortable and breakers stay closed.
Two loads, one compact box
One module manages two thermostat lines, eliminating the need for multiple enclosures. DIP switches let you set separate priorities for each channel in seconds — no software, no laptops.
Built to shrug off weather
The gasketed NEMA 4 cabinet seals out rain, dust, and hose‑down water. UV‑stable gray plastic won’t rust near the condenser pad or rooftop unit.
Fast, low‑voltage installation
A slim 8.75'' x 5.5'' x 3'' fits neatly on siding or equipment rails. Because the module rides on the thermostat loop, no conduit wrestling or heavy conductors are required.
Electrical / Environmental Ratings
Amperage: 50 A • Voltage: 120 V • Frequency: 60 Hz • Enclosure: NEMA 4 • Listing: UL • Communication: Symphony II PLC
Size
8.75'' x 5.5'' x 3''
Weight
2.1 lb
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Authorized Briggs & Stratton Distributor
- Genuine Products: You’re getting the real deal, backed by the manufacturer’s warranty.
- Exclusive Offers: You can access promotions, discounts, or bundles that are only available through authorized distributors.
- Competitive Pricing: We offer the best prices because we source directly from the manufacturer, with no middlemen driving up costs.
Authorized Distributor- 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 AccessoriesWhat 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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