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0Limited stock
SimpliPHI 3.8 48V Lithium Ferro Phosphate Battery with Integrated BMS w/ Communications (by Briggs & Stratton)
$2,902.41
Authorized Distributor
- SpecificationCompareSee all
- AMP Hours75 Ah
- TypeLithium solar batteries
Customer reviews & Questions
Verified buyer reviews
- Reviews (68)
- Questions
owned a year zero hiccups five big stars
installed a year ago zero issues five bright stars.
Checked temps under full load cool to the touch impressed
one year anniversary today zero failures zero regrets five shiny stars from me
One year owning today zero failures can’t beat that peace of mind.
Noise level like central AC not bad at all.
even grandma figured out the controller buttons nice and simple.
set it forget it peace of mind 24 / 7 cant beat it.
quiet mode exercise so soft I hardly hear it
Forget worrying about winter, this thing solved it
good gear just pricey.
Love ability to switch fuels flexible for rural home
installed outside in full sun no heat issues even at 95°f
InfoHub subscription extra cost but alerts are handy worth it to me
looks sharp gray aluminum case blends with siding
set it forget it peace of mind when grid drops
Runs the well pump, fridge, and my shop tools couldn’t ask for more
We work from home internet router never dropped once power went out perfect uptime.
Grid drop notice hit my phone then I heard the gen fire Timing perfect
first big test tornado watch no outages but self test quiet.
Nice low current draw; meter shows barely a blip.
Paired with 26 kW Briggs generator, flawless integration, nothing to program
Little louder than I hoped but still way quieter than the portable we had before
PowerProtect name fits it guarded my shop tools all day smooth voltage
Dual fuel = peace of mind switched to nat gas no hassle
7-year warranty sealed the deal feels like a long-term investment.
INSTALL TOOK 12 MIN TOPS cannot believe I waited this long
aluminum case survived freezing rain no rust no stains looks new.
aint let me down once power blips almost fun now
Storm knocked power 3 times this month switch didn’t miss a beat
keeps my electric dryer off till the fridge is steady, perfect load balance
Best home investment since the kitchen remodel peace of mind priceless
Slick little heater pad simple directions grandma could do it
five stars no doubt kept oil warm at ‑10 ° last night.
Generator guru here. Installed dozens—never one comeback. Reliable kit.
survived ice storm three days straight never skipped a beat
Heat pump and upstairs AC both happy zero overloads.
My wife thought we’d be in the dark for days install guy was done before lunch great product.
Seven-year warranty gave me confidence Quiet enough neighbors never complained.
Ran my 13 kW twice this week in snow, starts smooth like summer.
Kept battery warm through a weeklong outage. No hiccups at all.
Weekly self-test is neat I check it over coffee every Monday.
rain snow heat no problem out here in Wisconsin nice tough box.
love this thing saved me hundreds by keeping my old transfer switch
Hands-down best upgrade for our rural place no more dragging portables around
Running on natural gas here in Texas. Monthly test is 16 seconds—barely time to notice.
Runs on LTE so no WiFi drama at the cabin. Finally sleepin easy.
symphony choice is magic lets both ACs run without tripping love it .
good heater does what it says aint rocket science.
I love how quiet the switch is no buzz at all. Five stars.
wish the InfoHub module was included had to buy separate otherwise unit is perfect for the farm
Installation was smooth, footprint small, neighbors barely hear it.
install was a breeze twenty minutes tops and i am no electrician
We used a smaller generator thanks to this manager. Bills and fuel look better.
Ran my heat pump pool pump and lights at same time no sweat wow
does the job real nice
Plugged to natural gas no refuel hassle ran the whole AC plus fridge sweet deal
install was easy for my electrician and it just works
solid box, weatherproof like they said no drama, just power.
Great machine only wish the app was standard gotta buy the module
Install was smooth remote monitoring extra but worth it
good machine runs whole house fine just wish the wifi kit came in box had to order separate
Hooked to my A/C in ten minutes and it’s been flawless since.
Swap was done in 90 min kept my old switch super happy
Hooked it up in one afternoon smooth as butter runs both my panels no sweat
kicks on fast lights never flicker
solid 5 stars runs smooth n quiet dont worry bout outages no more
Flipped to generator power in seconds last storm. Exactly what I needed
Have a question about SimpliPHI 3.8 48V Lithium Ferro Phosphate Battery with Integrated BMS w/ Communications...? Feel free to ask!
Specification
| AMP Hours | 75 Ah |
| Battery Charging Voltages | 48V |
| Type | Lithium solar batteries |
| Dimensions LxWxH | 13.5 x 14 x 8 in |
| Weight | 86 lbs |
| Manufacturer | Briggs & Stratton |
| Manufacturer Part # | AmpliPHI-3.8-48 |
| Operating Temperatures | -4° to 140° F |
| Warranty | 10 Yr Warranty |
| Delivery Time | 5-7 Business Days |
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About product
$150 REBATE PROGRAM FOR ELITE IQ INSTALLERS
For every battery purchased from June 1, 2025 to August 31, 2025 you are entitled to a $150 rebate as an Elite IQ Installer.
Make a purchase → Fill out the form here → Get $150 check
See full Terms & Conditions attached to the product page for eligibility, claim steps, and exclusions.
SimpliPHI 3.8 kWh LFP Battery 48 V – Integrated BMS w/ Communications (includes 4′ CAT5 cable & terminator) delivers safe, cobalt-free lithium storage with plug-and-play networking for closed-loop inverter control. Housed in a rugged metal enclosure, it pairs a smart internal BMS with an accessible DC breaker for fast, code-compliant installs and decades of daily cycling.
- 3.8 kWh usable capacity (75 Ah @ 51.2 V) — up to 100% DoD
- Approx. 5.1 kW (100 A) 10-minute discharge; 1.9 kW (37.5 A) continuous charge/discharge
- Integrated BMS with closed-loop communications for leading 48 V inverters
- Includes 4′ CAT5 networking cable, RJ45 terminator plug and dust cover
- Scalable to 75 batteries per system (≈285 kWh total)
- Operating window: –4 °F to 140 °F (–20 °C to 60 °C)
- Integrated 100 A hydraulic/magnetic DC breaker & over-current protection
- Cobalt-free Lithium Ferro Phosphate chemistry for maximum safety
- 10,000 cycles @ 80% DoD; 10-year limited warranty
Integrated, communications-ready BMS
The built-in Battery Management System reports state of charge and critical diagnostics over closed-loop CAN/RS-485 style comms, streamlining commissioning and optimizing inverter performance.
Everything you need to network
Each unit ships with a 4′ CAT5 cable, RJ45 terminator and dust cover. Daisy-chain batteries and close the loop at the last unit—no extra parts to hunt down.
High power on demand
Deliver up to 5.1 kW for short surges and 1.9 kW continuously from a single module—ideal for motor starts and heavy household loads without stressing the cells.
Ultra-safe LFP chemistry
Cobalt-free Lithium Ferro Phosphate virtually eliminates thermal runaway risk and toxic coolants while offering superior thermal stability and long cycle life.
Grows with your system
Parallel up to 75 batteries (≈285 kWh) for whole-home or light-commercial storage. Identical cable lengths ensure balanced current sharing across the bank.
Built for harsh conditions
Operate from –4 °F to 140 °F, store down to –4 °F. The powder-coated steel case and integrated breaker enhance durability and safety in demanding environments.
Size
13.5″ W × 14″ H × 8″ D (15.5″ H with terminals)
Weight
86 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
SimpliPhi Batteries For Sale
SimpliPhi (Briggs and Stratton) Power, now backed by Briggs & Stratton, has been engineering and manufacturing premium lithium ferro phosphate (LFP) batteries in Oxnard, California since 2007. As a Tier 1 energy storage manufacturer with over a century of power expertise, SimpliPhi has established itself as the go-to solution for military, humanitarian organizations, agricultural groups, and residential/commercial projects worldwide. Their California-based manufacturing facility ensures rigorous quality control and American-made reliability, while their global reach enables competitive pricing without compromising premium materials or safety standards. With SimpliPhi (Briggs and Stratton) batteries for sale through authorized distributors, customers access cutting-edge lithium ferro phosphate technology that delivers unmatched safety, longevity, and performance. The SimpliPhi (Briggs and Stratton) name represents "simplified power" – reflecting their commitment to making advanced energy storage accessible and hassle-free for every application, from simpliphi 48v residential systems to large-scale commercial installations.
Why you choose SimpliPhi?
🔒 Proven Safety Leadership
SimpliPhi (Briggs and Stratton) utilizes the safest lithium ion chemistry available - Lithium Ferro Phosphate (LFP) with no cobalt, eliminating risks of thermal runaway, fire propagation, and toxic coolants.
🇺🇸 American Manufacturing Excellence
All SimpliPhi (Briggs and Stratton) batteries are engineered and manufactured in California, USA, ensuring superior quality control and supporting American jobs.
⚡ Ultra-Fast Installation
Revolutionary RapidStak™ connectors enable installation of 3 batteries in under 5 minutes with no wires, DIP switches, or complex setup.
🛡️ Unmatched Longevity
Industry-leading warranty coverage with 10,000+ cycles at 80% depth of discharge and 10-15 year warranties on most models.
What SimpliPhi battery series meets your energy needs?
SimpliPhi 6.6 Series - Revolutionary Stackable Power
| Specification | Details |
|---|---|
| Power Output | 6.65kWh per unit, stackable up to 3 units for 19.95kWh total capacity |
| Target Application | Residential whole-home backup and commercial installations |
| Key Technology | RapidStak™ connectors with all power and communications in one connection |
| Unique Features | Outdoor-rated design eliminates need for additional cabinets, installation in under 5 minutes |
| Models Available | SPHI-B-6.6 (052015-01) - 6.65kWh 48V stackable units |
| Discharge Rate | 130 amps DC continuous charge/discharge rate |
| Assembly | Manufactured in California, USA with gateway requirement for system integration |
AmpliPHI 3.8 Series - Communications-Enabled Storage
| Specification | Details |
|---|---|
| Power Output | 3.871kWh at 100% DOD, 3.09kWh at 80% DOD, 48V nominal |
| Target Application | Residential and commercial systems requiring advanced communications |
| Key Technology | Integrated Battery Management System (BMS) with closed-loop communications for Sol-Ark and SMA inverters |
| Unique Features | Built-in accessible 100 Amp DC breaker On/Off switch, scalable up to 30 batteries |
| Models Available | AmpliPHI-3.8-48 with communications capability |
| Discharge Rate | 100 Amps for 10 minutes, 37.5 Amps continuous |
| Warranty | 15-year limited warranty with repair or replacement coverage |
PHI 3.8-M Series - Versatile Modular Design
| Specification | Details |
|---|---|
| Power Output | 3.8kWh capacity, available in 24V and 48V configurations |
| Target Application | Residential, RV, marine, and off-grid applications |
| Key Technology | High-performance BMS with accessible 80A DC breaker and overcurrent protection |
| Unique Features | Compatible with all industry-standard inverter charge controllers, wall-mountable design |
| Models Available | PHI-3.8-48-M (48V) and PHI-3.8-24-M (24V) variants |
| Assembly | Engineered and manufactured in California, US, 86 lbs weight |
| Warranty | 10-year limited warranty with registration requirement |
How does SimpliPhi stack up against leading battery brands?
| Feature | SimpliPhi 6.6 | Tesla Powerwall 3 | Enphase IQ 10 |
|---|---|---|---|
| Power Output | 6.65kWh per unit | 13.5kWh per unit | 10.08kWh per unit |
| Efficiency | LFP chemistry, 130A discharge | 97.5% round-trip | 96.5% round-trip |
| Warranty Performance | 75% capacity after 10 years | 70% capacity after 10 years | 70% capacity after 10 years |
| Price/Performance | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Stackable Option | Yes, up to 3 units (RapidStak) | Yes, up to 10 units | Yes, up to 40 units |
| Notable Strengths | 5-minute installation, outdoor-rated | Integrated inverter, brand recognition | Microinverter ecosystem |
What makes SimpliPhi batteries built to last?
| Component | Specification | Benefits |
|---|---|---|
| Battery Chemistry | Lithium Ferro Phosphate (LFP) - safest lithium chemistry available | No cobalt, no risk of thermal runaway or fire |
| Battery Management | Integrated high-performance BMS with communications | Real-time monitoring, overcurrent protection |
| Safety Certifications | UL 1642, UL 1973, UL 9540, UL 9540A Fire Safety certified | Industry-leading safety compliance |
| Operating Temperature | No ventilation, cooling or thermal regulation required | Maintenance-free operation |
| Housing Protection | White metal case, wall-mountable design | Durable, professional appearance |
| Cycle Life Testing | 10,000+ cycles at 80% DOD | $0.12 per kWh lifetime cost |
Independent testing by UL validates SimpliPhi (Briggs and Stratton) thermal stability and fire safety performance, with zero degradation in extreme stress tests. The outdoor-rated design withstands harsh environmental conditions without additional protective enclosures.
What do customers and experts say about SimpliPhi?
"All in all, an exceptional purchasing experience from Voltaico, thanks to Meredith. She did a fine job. The Briggs and Stratton batteries (Ampliphi) were packed very well and everything came through without incident."
Nevada Customer
"Your experience will be incredible! First, these folks have the best price of anyone online. Second, their staff walked us through options and an alternative unit, making certain what we wanted was actually what we needed."
Verified Purchaser
🏆 Professional Recognition
SimpliPhi (Briggs and Stratton) batteries have earned recognition from industry leaders including UL certification for fire safety (UL 9540A) and compliance with UN 3480 international shipping standards. According to industry analysis, "few people in the solar industry would argue that there's a higher-quality LFP battery than Briggs & Stratton's SimpliPhi." The combination of customer trust and expert validation makes SimpliPhi (Briggs and Stratton) suitable for both residential backup power and demanding commercial installations.
Frequently Asked Questions About SimpliPhi Batteries
Where are SimpliPhi batteries manufactured?
All SimpliPhi (Briggs and Stratton) batteries are engineered and manufactured in Oxnard, California, USA, ensuring American quality standards and supporting domestic manufacturing.
What warranty coverage is provided?
SimpliPhi (Briggs and Stratton) offers industry-leading warranties: 15-year limited warranty on AmpliPHI series and 10-year warranties on other models, covering repair or replacement for manufacturing defects. Warranty registration is required and must be completed through the manufacturer's website.
Are SimpliPhi batteries suitable for extreme climatic conditions?
Yes, SimpliPhi 6.6 batteries are outdoor-rated and require no additional protective cabinets. The LFP chemistry operates without ventilation, cooling, or thermal regulation requirements.
How do SimpliPhi batteries perform compared to competitors?
SimpliPhi (Briggs and Stratton) batteries deliver exceptional value at approximately $0.12 per kWh over their lifetime - significantly more cost-effective than many competitors. Industry comparisons show SimpliPhi "meets or exceeds industry standards" with "excellent efficiency" and superior quality construction.
What certifications do SimpliPhi batteries have?
SimpliPhi (Briggs and Stratton) batteries are certified to UL 1642, UL 1973, UL 9540, and UL 9540A Fire Safety standards, plus UN 3480 international shipping compliance and CE certification.
Is bulk purchasing available for commercial projects?
Yes, volume pricing starts at 3 batteries and bulk purchasing is available for commercial installations. AmpliPHI systems can scale up to 30 batteries, while 6.6 series can expand to 6 stacks (18 batteries) for 119.7kWh capacity.
Ready to experience the SimpliPhi difference?
Discover SimpliPhi revolutionary stackable batteries with 5-minute installation and industry-leading warranties. Power your future with American innovation and uncompromising quality.
Shop SimpliPhi BatteriesWhat 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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