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Tigo 3.8K Hybrid Inverter

Tigo 3.8K Hybrid Inverter

Price: $1,649.98
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Price: $1,649.98
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Tigo EI Hybrid Inverter (TSI-3.8K US)

The Smart Heart of Your Energy Intelligence System

The hybrid Tigo EI Inverter is the centerpiece of the Tigo Energy Intelligence (EI) solution. It intelligently orchestrates energy production and consumption when coupled with a Tigo EI Battery. Additionally, it enables advanced module-level monitoring, optimization, and rapid shutdown compliance when paired with Tigo TS4 MLPE (Module Level Power Electronics).

Key Features

  • High Performance: Supports up to 200% DC oversizing (2:1 DC/AC ratio) and features a low 80V starting voltage.

  • Flexible Design: Multiple MPPT options (2, 3, or 4 depending on the model) to optimize complex, uneven roof layouts.

  • Smart Platform: Fully powered by the Tigo Energy Intelligence platform for streamlined, centralized management.

  • Safety & Compliance: Built-in, full NEC 690.12 rapid shutdown compliance.

  • Seamless Connectivity: Integrated Wi-Fi standard with optional cellular communication for reliable data backup.

  • Rapid Commissioning: Under 10-minute setup (including Tigo TS4s) using the intuitive EI mobile app.

  • Built to Last: Lightweight, robust design (32 to 45 lbs.) backed by a generous 152-month standard warranty.

Technical Specifications

Input (PV)

Specification 3.8K ¹ 7.6K 11.4K
Max. Recommended Power (STC) 7600 W 15200 W 22800 W
Max. DC System Voltage 600 V 600 V 600 V
MPPT Voltage Range 80 V ~ 550 V ² 80 V ~ 550 V ² 80 V ~ 550 V ²
Full-Load Voltage Range 150 V ~ 500 V 200 V ~ 500 V 220 V ~ 500 V
Number of MPPTs 2 3 4
PV Strings per MPPT 2 2 2
Max. Input Current per MPPT ($I_{MP}$ / $I_{SC}$) 13.5 A / 16.9 A 13.5 A / 16.9 A 13.5 A / 16.9 A

Battery Connection (DC)

Specification 3.8K ¹ 7.6K 11.4K
Nominal DC Voltage 400 V 400 V 400 V
I/O DC Current Up to 11.1 A Up to 21.7 A Up to 32.5 A ³
I/O DC Power 4000 W 7800 W 11700 W ⁴

Output (AC Grid-Tied)

Specification 3.8K ¹ 7.6K 11.4K
Nominal Power @ 208V / 240V 3290 W / 3800 W 6580 W / 7600 W 9880 W / 11400 W
Max. Apparent Power 3800 VA 7600 VA 11400 VA
Nominal Voltage / Grid Freq. 208 V or 240 V / 50/60 Hz 208 V or 240 V / 50/60 Hz 208 V or 240 V / 50/60 Hz
Max. Output Current 16 A 32 A 48 A
Power Factor / Adj. Range >0.99 / (0.8 lead ~ 0.8 lag) >0.99 / (0.8 lead ~ 0.8 lag) >0.99 / (0.8 lead ~ 0.8 lag)
THDI / Grid Connection Type <3% / L1, L2, N, PE <3% / L1, L2, N, PE <3% / L1, L2, N, PE

Output (Emergency Backup)

Specification 3.8K ¹ 7.6K 11.4K
AC Nominal Power 3800 W 7600 W 11400 W
Max. AC Power Output (Peak) 6000 VA ⁴ 12000 VA ⁴ 18000 VA ⁴
Nominal AC Voltage 240 V 240 V 240 V
Max. Output Current 25 A ⁵ 50 A ⁵ 75 A ⁵
Total Harmonic Distortion (THD) 2% linear / 5% non-linear 2% linear / 5% non-linear 2% linear / 5% non-linear

Efficiency & Protection

Specification 3.8K ¹ 7.6K 11.4K
Max. Efficiency 98.0% 98.4% 98.5%
CEC Efficiency (@240 V / @208 V) 97.0% / 97.0% 97.5% / 97.0% 98.0% / 97.5%
Built-In Protection Features

- Reverse Polarity


- DC Disconnect


- Type II DC Surge


- Type III AC Surge


- Insulation Monitoring

- AC Short-Circuit


- Ground Fault Monitoring


- Grid Monitoring


- Anti-Islanding


- Residual-Current Monitoring

 - AFCI Protection

Physical & Environmental Specs

  • Dimensions (W x D x H):

    • 3.8K & 7.6K: 400 x 170 x 570 mm (15.8 x 7 x 22 in)

    • 11.4K: 400 x 187 x 638 mm (15.8 x 7.4 x 25.2 in)

  • Weight:

    • 3.8K & 7.6K: 14.7 kg (32.3 lbs.)

    • 11.4K: 20.5 kg (45.2 lbs.)

  • Operating Temperature Range: -25°C to 60°C (-13°F to 140°F) Note: Derating occurs above 45°C / 113°F

  • Environmental Rating: NEMA 4X / IP65 (Suitable for indoor or outdoor installation)

  • Cooling: Natural Convection

  • Maximum Altitude: 3000 m (9,843 ft.)

  • Nighttime Internal Consumption: <1 W (PV) / <5 W (Storage)

  • Communication Interfaces: RS-485 built-in; Wi-Fi standard; 4G Cellular optional

  • Revenue-Grade Meter: Built-in ANSI C12.20 (meets 0.5% accuracy)

Advanced Safety Integrations:

  • PVRSS Rapid Shutdown: Fully compliant when paired with TS4-A-F/2F or TS4-A-O/S.

  • Module-Level Monitoring: Enabled via TS4-A-O/M/S.

Certifications & Grid Listings

Certifications

FCC Part 15B, UL1741:2021 Ed.3, UL1741:2021 Ed.3 (PVRSS) (SA) (SB), CSA 22.2-107.1:2016, UL1741 CRD: PCS, UL1699B, IEEE 1547:2018, IEEE 1547.1:2020, HECO-SRD1547.1:2020 Ed.2

Grid Listings

CA-CEC, CA Rule 21 CSIP, CA CPUC-SGIP, Hawaii Rule 14H / Rule 22 / Rule 27 / Rule 32, Puerto Rico-OGPe

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