Tigo prints 601-2103K8-0002 in its Ordering Information table as "3.8kW hybrid inverter, built-in Wi-Fi. Compatible with 50A ATS". The datasheet heading prints the series designation TSI-3.8/7.6/11.4K-US; no per-model TSI string is printed.
Printed as "DC (PV): 12 – 8 AWG" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, Wiring.
Printed as "With a minimum 300 mm (12 in.) clearance around the top and sides." in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), Planning, Component Layout, Inverter.
Printed once for all models as 80 V - 550 V; full-load voltage range for the 3.8K is 150 V-500 V. Tigo notes the inverter enters standby above 550 V and risks damage over 600 V.
Printed once for all models: nominal voltage 208 V/240 V, grid frequency 50/60 Hz, grid connection type L1/L2/N/PE. Backup output nominal AC voltage is 240 V.
Read from the 3.8K column (first of three) of the datasheet. Printed as 3290 W at 208 V and 3800 W at 240 V; the 240 V figure is recorded. Maximum apparent power 3800 VA.
Read from the 3.8K column (first of three) of the datasheet. CEC efficiency printed as 97.0% at 240 V and 97.0% at 208 V; the 240 V figure is recorded. Manufacturer claim.
Printed once for all models as 80 V - 550 V; full-load voltage range for the 3.8K is 150 V-500 V. Tigo notes the inverter enters standby above 550 V and risks damage over 600 V.
Printed as "DC (PV): 12 – 8 AWG" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, Wiring.
Printed as "With a minimum 300 mm (12 in.) clearance around the top and sides." in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), Planning, Component Layout, Inverter.
Printed as "Enclosure grounding: 10 – 8 AWG" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, Wiring.
Printed as "3.8 kW inverter: 20 A 2-pole breaker" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, grid connection steps.
Printed as "DC (battery): 12 – 8 AWG" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, Wiring.
Printed as "AC (grid or ATS): 8 – 6 AWG" in Tigo's EI Residential Solar Solution US installation manual (w/ATS 50A, 002-00150-00 Rev. 1.7), The EI Inverter, Power Connections, Wiring.
Certifications row as printed by Tigo, one row for all three models. Manufacturer claim; no issuer directory was checked. Listings printed separately: CA-CEC, CA Rule21 CSIP, CA CPUC-SGIP, Hawaii Rule 14H, Rule 22, Rule 27 and Rule 32, Puerto Rico-OGPe.
UL1741:2021 Ed.3Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3 (PVRSS) (SA) (SB)"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
CSA 22.2-107.1:2016Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("CSA 22.2-107.1:2016"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1741 CRD: PCSManufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741 CRD: PCS"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1699BManufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1699B"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547:2018Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547:2018"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547.1:2020Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547.1:2020"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Location: Page 1 Input, Battery and Output tables; page 2 Ordering Information, Output (Backup), Efficiency and General tables
Retrieved
Recorded document/effective date: Oct 27, 2025
Tigo Energy's own two-page datasheet for the EI Inverter (US), linked from its EI Inverter product page as the English (UL) datasheet and captured on September 24, 2026. The tables print three model columns headed 3.8K, 7.6K and 11.4K; the Ordering Information table maps each Tigo part number to its rating. In the General table the dimensions and weight print two values: the first under the 3.8K column and the second centered across the 7.6K and 11.4K columns. The Certifications and Listings rows are manufacturer claims; no issuer directory was read.
Archived copies
Archived copy of a document published by Tigo Energy. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Tigo EI Residential Solar Solution US Installation Manual (w/ATS 50A), 002-00150-00 Rev. 1.7OfficialTigo Energy, Inc.Official installation manualMay 2026
Source details
Revision
002-00150-00 Rev. 1.7
Revision date
May 2026
Archived copy captured on 2026-10-01.
Location: PDF page 1, title; Appendix A (UL 1741 PCS CRD) inverter list; The EI Inverter chapters
Retrieved
Tigo Energy's own installation manual for the EI Residential Solar Solution (US) with the 50A automatic transfer switch, linked from Tigo's EI Inverter product page and captured 1 October 2026 from Tigo's file host; document 002-00150-00 Rev. 1.7 as printed. It covers the EI Inverter and names the hybrid inverters TSI-3.8K-US, TSI-7.6K-US and TSI-11.4K-US; it does not print Tigo's part numbers. Manufacturer instructions, not independent tests.
Archived copies
Archived copy of a document published by Tigo Energy, Inc.. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Tigo EI Inverter (US) product page (captured September 24, 2026)OfficialTigo EnergyOfficial product page
Source details
Revision
Not stated
Revision date
Not stated
Location: Description; Downloads, Datasheets
Retrieved
Tigo Energy's own EI Inverter product page, captured on September 24, 2026. Cited for the product description, the link to the datasheet and the product photograph. It carries no revision or date, and its marketing figures are not used.
Archived copy of a document published by Tigo Energy. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Tigo EI Residential Solar Solution US Installation Manual (w/ATS 50A), 002-00150-00 Rev. 1.7
Archived copy of a document published by Tigo Energy, Inc.. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Printed as "Warranty 152 months" and in the feature list as "152 month standard warranty"; converted to years. The warranty terms document was not read.
The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.
Missing details. This number counts only the evidence recorded so far. The source review for this product is not finished, or the maker has not disclosed enough, so the number can only go up.
Missing for this product: Certificate evidence needed; Battery conversion efficiency needed; Idle consumption needed.
Each input is scored against the best documented value for an inverter: warranty term and battery conversion efficiency against every published inverter, idle consumption (lower is better) against the inverters in the same output band, or against every published inverter when the output is not documented. A documented value always earns points; an undisclosed one earns 0 and is listed as missing. Researched products receive a score. Certificates earn points for the evidence itself. Size and weight do not affect scores.
Warranty term12.67 years15.2 / 30.0
12.67 of 25 years, the best documented for an inverter (printed by the maker): APsystems DS3
Printed as "Warranty 152 months" and in the feature list as "152 month standard warranty"; converted to years. The warranty terms document was not read.
Research pending, 0 points: Certificates, Battery conversion efficiency, Idle consumption.
Warranty term and battery conversion efficiency are compared with every published inverter; idle consumption with the inverters in the same 3.5 to 7 kW output band. · Method version 0.5
UL1741:2021 Ed.3Product / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1741:2021 Ed.3 (PVRSS) (SA) (SB)Product / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3 (PVRSS) (SA) (SB)"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
CSA 22.2-107.1:2016Product / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("CSA 22.2-107.1:2016"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1741 CRD: PCSProduct / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741 CRD: PCS"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1699BProduct / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1699B"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547:2018Product / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547:2018"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547.1:2020Product / system scope unresolvedClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547.1:2020"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1741:2021 Ed.3Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3 (PVRSS) (SA) (SB)"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
CSA 22.2-107.1:2016Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("CSA 22.2-107.1:2016"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1741 CRD: PCSManufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741 CRD: PCS"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
UL1699BManufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1699B"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547:2018Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547:2018"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
IEEE 1547.1:2020Manufacturer claim · equipment listingClaimedListed when checked
Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547.1:2020"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
No sourced accessories or replacement parts listed yet.
Model history
Model identity
Model
601-2103K8-0002
Manufacturer SKU 601-2103K8-0002 · US market
Observed
UL1741:2021 Ed.3: claimed
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741:2021 Ed.3 (PVRSS) (SA) (SB)"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("CSA 22.2-107.1:2016"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1741 CRD: PCS"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("UL1699B"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547:2018"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
Product / system scope unresolved. Manufacturer claim in the Certifications row of Tigo's EI Inverter datasheet 002-00081-00 Rev. 4.6, recorded exactly as printed ("IEEE 1547.1:2020"). The row covers the whole TSI-3.8/7.6/11.4K-US series; no certificate number, issuer or file number is printed beside it, and no issuer directory was checked.
