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tigo|SKU:BNDL-1594030

Tigo 3.8kW Hybrid Inverter Bundle with 9.9kWh LiFePO4 Battery and 50A ATS

Field-Tested Backup Power for Smaller Homes and Partial-Load Applications

Hands-free backup power — Automatic transfer switch keeps critical loads running
9.9kWh LiFePO4 storage — Lithium iron phosphate chemistry for long cycle life
Dual MPPT solar input — Handles up to 7,600W of solar production
Centralized system monitoring — Tigo platform tracks production, storage, and usage
  • FREE System Design Consultation -- Our engineers size your system for your actual consumption
  • FREE Shipping -- LTL freight included, no surprise charges
  • Compatibility Guarantee -- Pre-vetted components built to work together

$7,286.95

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Tigo 3.8kW Hybrid Inverter + 9.9kWh Battery + 50A Auto Transfer Switch Bundle
Tigo 3.8kW Hybrid Inverter + 9.9kWh Battery + 50A Auto Transfer Switch Bundle
$7,286.95

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In the box

  • Tigo 3.8kW Hybrid Inverter
  • 9.9kWh LiFePO4 Battery (1 enclosure, 3 modules)
  • 50A MLO Auto Transfer Switch
Tigo 3.8kW Hybrid Inverter + 9.9kWh Battery + 50A Auto Transfer Switch Bundle
Tigo 3.8kW Hybrid Inverter Bundle with 9.9kWh LiFePO4 Battery and 50A ATS
$7,286.95

Field-Tested Backup Power for Smaller Homes and Partial-Load Applications

This Tigo 3.8kW hybrid inverter bundle delivers a field-tested, grid-independent power system for residential backup and self-consumption. The 3,800W inverter manages solar production, battery charging, and grid interaction through one unit, while the 9.9kWh lithium iron phosphate battery stores excess energy for outages or nighttime use. The included 50A MLO Auto Transfer Switch handles automatic power transfer to critical loads without manual intervention. Monitor everything through the Tigo platform for full visibility into production, storage, and consumption.

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Dual MPPT Inputs
50A Auto Transfer
Tigo Ecosystem Monitoring
LiFePO4 Battery Chemistry
9.9 kWh
LiFePO4 Battery Storage
3,800 W
Nominal Output Power @240V
50 A
Auto Transfer Switch Rating
No Manual Switching When the Grid Drops

No Manual Switching When the Grid Drops

Your neighbor's grid-tied solar system goes dark the moment the utility fails. That defeats the entire point of investing in solar. This Tigo bundle eliminates that vulnerability with a 50A auto transfer switch that seamlessly shifts your critical circuits to battery backup without you touching a single breaker. Off Grid Vault pre-vets every component in this kit for full compatibility — the inverter communicates with the battery, the ATS handles the transfer, and the MPPTs manage your solar input. No mix-and-match guesswork, no incompatible protocols, no discovering after installation that your components refuse to talk to each other.

9.9kWh LiFePO4 Storage for Real Autonomy

9.9kWh LiFePO4 Storage for Real Autonomy

Lithium iron phosphate is the chemistry serious off-grid builders demand — not lithium-ion, not AGM. This 9.9kWh battery stores your excess solar production for nighttime use and grid outages, delivering the depth of discharge and cycle life that makes energy independence a practical reality rather than a weekend experiment. Paired with the 3,800W hybrid inverter, the system balances charging and discharge based on your actual consumption patterns. The Tigo platform gives you real-time visibility into state of charge, so you always know exactly how many days of autonomy you have left when the sun is not cooperating.

Dual MPPTs Built for Serious Solar Input

Dual MPPTs Built for Serious Solar Input

Two independent MPPT charge controllers handle a DC voltage range from 80V to 550V, supporting up to 7,600W of recommended solar input at STC. That means you can run higher-voltage strings with fewer parallel runs, reducing wire gauge requirements and simplifying your array layout. The 600V max DC system voltage gives you flexibility in panel configuration without pushing the inverter to its limits. Whether you are roof-mounting on a smaller home or ground-mounting a dedicated array for your cabin, the dual MPPT architecture adapts to your site conditions rather than forcing you to design around the inverter's constraints.

Is This Bundle Right for Your Setup?

This system is sized for smaller homes or partial-backup scenarios. Confirm your setup meets these conditions before ordering.

  • Home with 208V or 240V electrical panel and critical loads drawing no more than 50A
  • Solar array producing between 3.8kW and 7,600W at STC within 80V–550V MPPT range
  • Indoor or sheltered location with dedicated wall space for inverter and battery enclosure

Built for Real-World Scenarios

Whether you are cutting the cord or just keeping the lights on when the grid fails, this bundle covers the essentials.

Small Home Partial Backup
Cabin or Homestead Power
Critical Load Protection During Outages

Full specifications

At a glance

Dimensions
See product page
Power
7600 W
Warranty
See product page
Full specifications18 data points across 4 categories

Dimensions

Enclosure dimensionsSee product page

Power & Performance

Input (PV)3.8K
Max. recommended power (STC)7600 W
Max. DC system voltage600 V
MPPT voltage range80 V ~ 550 V
Full-load voltage range150 V~500 V
MPPT2
Nominal DC voltage400 V
Nominal power @208V/240 V3290 W/ 3800 W
Max. apparent power3800 VA
Nominal voltage208 V/240 V
Grid frequency50/60 Hz
Max. output current16 A
Battery capacity9.9 kWh
Battery chemistryLithium iron phosphate
Auto Transfer Switch rating50 A

Materials

Battery enclosureSee product page

Compliance & Warranty

Warranty detailsSee product page

The Off Grid Vault Promise

Every system we sell is pre-vetted, fully supported, and backed by people who actually build off-grid.

Compatibility GuaranteeEvery component in this bundle is specced to work together — no mismatched voltages, no wrong BMS protocols, no guesswork.
Free ShippingShips free on all orders, including LTL freight for large systems. Threshold delivery included, no surprise freight charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
★★★★★
“I set this up for partial backup on my 1,400 sq ft home in northern Arizona. The ATS switched over during a monsoon outage last month and I did not have to touch a thing. Fridge stayed cold, lights stayed on, and the Tigo app let me watch my battery SoC the whole time. Exactly what I needed — no surprises.”
F
First L.Flagstaff, AZ

Tigo 3.8 Hybrid Inverter with Battery Backup | 9.9 Wh, 9.9kW Capacity | 1 Enclosure & 3 Modules

The Tigo 3.8kW Hybrid Inverter with 9.9kWh Battery and 50A MLO Auto Transfer Switch Bundle is a complete residential energy storage solution designed for efficient solar management and dependable backup power. The 3.8kW hybrid inverter intelligently balances solar production, battery charging, and grid interaction, allowing homeowners to maximize self-consumption while maintaining reliable power during outages.

Paired with the 9.9kWh lithium iron phosphate battery, the system stores excess solar energy for use at night or during utility interruptions, helping reduce reliance on the grid and improve overall energy resilience.


The included Tigo 50A MLO Auto Transfer Switch enables automatic power transfer to critical loads when a grid outage occurs, ensuring a smooth and hands-free transition to backup power. Fully integrated within the Tigo energy ecosystem, the bundle offers centralized monitoring and control through the Tigo platform, providing clear visibility into energy production, storage, and usage. Well suited for smaller homes or partial-backup applications, this bundle delivers a streamlined, reliable, and future-ready solution for modern residential solar and energy storage systems.

Tigo EI Inverter 3.8kW Hybrid Inverter Specs

  • Input (PV): 3.8K
  • Max. recommended power (STC): 7600 W
  • Max. DC system voltage: 600 V
  • MPPT voltage range: 80 V ~ 550 V2
  • Full-load voltage range: 150 V~500 V
  • MPPT: 2
  • Nominal DC voltage: 400 V
  • Nominal power @208V/240 V: 3290 W/ 3800 W
  • Max. apparent power: 3800 VA
  • Nominal voltage: 208 V/240 V
  • Grid frequency: 50/60 Hz
  • Max. output current: 16 A
  • Dimensions: 15.8 x 7 x 22 in.
  • Weight: 32.3 lb.

Tigo EI Battery 9.9kWh Specs

  • Parallel: 3
  • Battery Capacity: 9.9kWh
  • Max. charge/discharge power: 5000W/5000W
  • Max. charge/discharge current: 14.3A@360V
  • Battery Type: Lithium Iron Phosphate (LFP)
  • Nominal Voltage: 400V
  • Operating voltage range: 360V ~ 550V
  • IP Protection: IP56/NEMA Type 4
  • Installation: Floor and Wall installation
  • Operating temperature: 14°F ~ 113°F
  • Cycle life: >6000 cycles
  • Communication port: RS485/CAN


Tigo 50A MLO Auto Transfer Switch Features

The Tigo 50A MLO Auto Transfer Switch is a compact and dependable solution for managing backup power in residential energy storage systems. Rated at 50 amps, it automatically transfers power between the utility grid and a connected backup source during outages, allowing critical circuits to remain energized without the need for manual switching. This automatic operation helps ensure a smooth transition during power interruptions while protecting connected loads.

Designed for compatibility with Tigo hybrid inverters and energy storage systems, the MLO configuration supports flexible installation for partial-home or critical-load backup applications. Its durable construction and streamlined design make it well suited for residential environments where reliability and simplicity are essential. The Tigo 50A MLO Auto Transfer Switch provides consistent, hands-off power transfer to support dependable backup energy operation.


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Frequently Asked Questions

At $250 per month in utility costs, a $7,287 system pays off in roughly 2.4 years. After that, every dollar you would have sent to the utility company stays in your pocket. The 9.9kWh LiFePO4 battery is designed for thousands of cycles, meaning the system continues delivering value well beyond the break-even point. This is not a monthly expense — it is a fixed investment that eliminates a variable, rising cost.
When you piece together an inverter, battery, and transfer switch from different vendors, you assume the risk of incompatible communication protocols, mismatched voltage ratings, and no single point of accountability if something fails. Off Grid Vault pre-vets this Tigo bundle for full component compatibility — the inverter, battery BMS, and ATS are verified to work together. We are an authorized dealer, so warranty claims go through us, not through a ticket queue. You get a system that works out of the box, backed by people who understand off-grid power.
The 3.8kW inverter delivers 3,800W continuous output at 240V, which covers most standard household loads including refrigerators, lighting, and electronics. However, well pumps typically require high surge wattage at startup. Whether this bundle supports your specific well pump depends on its locked-rotor amps and your total simultaneous load. We recommend taking advantage of our free system design consultation — tell us your consumption profile and we will confirm whether this bundle fits your requirements or whether a higher-capacity system is the right call.
Lithium iron phosphate chemistry is the standard for serious off-grid storage because it maintains consistent capacity over thousands of charge cycles. While exact cycle life depends on your depth of discharge, operating temperature, and charge rate, LiFePO4 batteries routinely deliver 10 or more years of service at 80% capacity retention. Unlike AGM or lead-acid batteries that degrade quickly with deep discharges, this 9.9kWh battery is built for the daily cycling that true off-grid and backup applications demand. The manufacturer warranty covers defects — and as an authorized dealer, Off Grid Vault handles those claims directly.
Installation timeline depends on your existing electrical setup, whether you already have a solar array mounted, and whether you are handling the work yourself or using an electrician. The inverter weighs 32.3 lbs and measures 15.8 x 7 x 22 in., so mounting is straightforward for a single person. The 50A ATS integrates into your critical loads panel. If you already have panels wired and ready for DC input, a qualified installer can typically commission this system in a single day. Contact us for a free system design consultation and we can help you plan the timeline.
This system is well suited for smaller homes or partial-backup applications where you are covering critical circuits rather than a full whole-home load. For a fully off-grid cabin with moderate daily consumption — lighting, refrigeration, electronics, and small appliances — the 9.9kWh battery and 3,800W inverter can form the core of your power system, especially when paired with adequate solar input through the dual MPPTs. For larger homes or whole-home off-grid applications with higher daily kWh demands, you may need additional battery capacity or a higher-wattage inverter. Our free consultation helps you determine the right fit.
SKU: BNDL-1594030 Category: Brand:

The Off Grid Vault Promise

Every system we sell is pre-vetted, fully supported, and backed by people who actually build off-grid.

Compatibility Guarantee Every component in this bundle is specced to work together — no mismatched voltages, no wrong BMS protocols, no guesswork.
Free Shipping Ships free on all orders, including LTL freight for large systems. Threshold delivery included, no surprise freight charges.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.

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About tigo Inverter Bundle

tigo is a trusted manufacturer of premium inverter bundle. OffGridVault is an authorized dealer offering the full tigo lineup with free delivery, price match guarantee, and expert support.

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