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Fronius Primo 3.8-1 208-240

By FroniusSKU 4,210,064,800

Grid-tie inverter
Evidence score32/100Missing details
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Continuous output3.8 kWBattery voltageNot statedSolar inputNot statedMPPT trackers2MPPT range200 to 480 VAC outputNot statedWarranty10 yearsSize55.4 L*W: 429.3 × H: 627.4 × D: 205.7 mmWeight21.45 kg / 47.29 lb

Key specs

Units
SKU
4,210,064,800
Official product page
Sources

Fronius article number, carried as "ArticleNumber" 4,210,064,800 in the product data embedded in the Fronius technical data page for "Fronius Primo 3.8-1 208-240" captured on September 24, 2026 (the page labels the field "Article number"). Greentech Renewables lists the same article number.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Embedded product data, ArticleNumber

Documented

AC configuration
Single-phase
Official product page
Sources

The Fronius Primo UL family text on the technical data page captured on September 24, 2026 prints "the ideal compact single-phase inverter for residential applications".

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Family description

Documented

Weight
21.45 kg47.29 lb converted
Official user manual
Sources

Printed as "Weight 47.29 lbs. (21.45 kg)" in Fronius's Fronius Primo 208-240 Operating instructions (025-16102024), Technical data section, Fronius Primo 208-240 3.8-1 / 5.0-1 / 6.0-1 table, Weight row, 3.8-1 208-240 column.

Official user manual: Fronius Fronius Primo 208-240 Operating instructions (025-16102024) Rev 025-16102024 · October 2024 · Checked · Earlier document

Location: Technical data section, Fronius Primo 208-240 3.8-1 / 5.0-1 / 6.0-1 table, Weight row, 3.8-1 208-240 column

Documented

MPPT trackers
2
Official product page
Sources

Printed as "Number of MPP trackers 2" on the Fronius technical data page captured on September 24, 2026.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Input Data

Documented

Frequency
60 Hz
Official product page
Sources

Printed as "Frequency 60 Hz" on the Fronius technical data page captured on September 24, 2026; the page also prints "Frequency range 45 - 66 Hz".

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data

Documented

Dimensions
55.4 L
Calculated: Enclosure volume: W × H × D ÷ 1,000,000
W: 429.3 × H: 627.4 × D: 205.7 mmW: 16.9 × H: 24.7 × D: 8.1 in convertedOfficial datasheet
Sources

Published in the Fronius Primo US datasheet as 16.9 x 24.7 x 8.1 in. (width x height x depth) for the 3.8-8.2 column; converted at 25.4 mm/in and rounded to 0.1 mm. The technical data page prints the same enclosure in feet and inches (1,42 ft x 2,11 ft x 8,05 in).

Official datasheet: Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023) Rev M,06,0229,EN-US USA REV. 05/11/2023 · Checked · Earlier document

Location: Datasheet, General data, first column

Calculated

Efficiency
96.7 %
Official product page
Sources

Maximum efficiency, printed as "Max. efficiency 96,7 %" (decimal comma) on the Fronius technical data page captured on September 24, 2026. No operating point is stated.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data

Documented

MPPT voltage range
200 to 480 V
Official product page
Sources

Printed as "MPP voltage range (U mpp min - U mpp max ) 200 - 480 V" on the Fronius technical data page captured on September 24, 2026.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Input Data

Documented

Enclosure
NEMA 4X
Official product page
Sources

Printed as "Degree of protection NEMA 4X" on the Fronius technical data page captured on September 24, 2026.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, General Data

Documented

All specs18
AC configuration
Single-phase
Official product page
Sources

The Fronius Primo UL family text on the technical data page captured on September 24, 2026 prints "the ideal compact single-phase inverter for residential applications".

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Family description

Documented

Efficiency
96.7 %
Official product page
Sources

Maximum efficiency, printed as "Max. efficiency 96,7 %" (decimal comma) on the Fronius technical data page captured on September 24, 2026. No operating point is stated.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data

Documented

Apparent power
3,800 VA
Official product page
Sources

Maximum output power at 240 V, printed as "Max. output power 240 V 3800 VA" on the Fronius technical data page captured on September 24, 2026; the page prints "Max. output power 208 V 3800 VA" at 208 V. Fronius prints this figure in VA (or kVA with a decimal comma); no rated real power in watts is printed on the page or in the datasheet for this model.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data, Max. output power 240 V

Documented

Idle consumption
1 W
Less than 1 WOfficial datasheet
Sources

Printed as "Night time consumption < 1 W" in the Fronius Primo US datasheet general data table, one value for all Primo models; the figure is an upper bound ("less than 1 W"), not a measured value.

Official datasheet: Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023) Rev M,06,0229,EN-US USA REV. 05/11/2023 · Checked · Earlier document

Location: Datasheet, General data

Documented

Continuous output
3.8 kW
Converted: 3,800 W x 0.001 = 3.8 kW
Official user manual
Sources

Converted: 3,800 W x 0.001 = 3.8 kW

Printed as "3800 W 3800 W 3800 W" in Fronius's Fronius Primo 208-240 Operating instructions (025-16102024), Technical data section, Fronius Primo 208-240 3.8-1 / 5.0-1 / 6.0-1 table, Nominal output power (P nom) at 208 V, 220 V and 240 V row, 3.8-1 208-240 column. The same figure is printed at all three grid voltages.

Official user manual: Fronius Fronius Primo 208-240 Operating instructions (025-16102024) Rev 025-16102024 · October 2024 · Checked · Earlier document

Location: Technical data section, Fronius Primo 208-240 3.8-1 / 5.0-1 / 6.0-1 table, Nominal output power (P nom) at 208 V, 220 V and 240 V row, 3.8-1 208-240 column

Converted

Weighted efficiency
95 %
Official product page
Sources

CEC weighted efficiency at 240 V, printed as "CEC efficiency 240 V 95 %" (decimal comma) on the Fronius technical data page captured on September 24, 2026.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data

Documented

AC voltage configuration
1~ NPE 208 / 240 V
Official product page
Sources

Literal manufacturer output configuration printed on the Fronius technical data page captured on September 24, 2026.

Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Location: Technical Data, Output Data

Documented

Published claims and calculations, not independent test results.

Documents

3 on file
  • PDF
    Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023)OfficialFronius International GmbHOfficial datasheet
    Source details
    Revision
    M,06,0229,EN-US USA REV. 05/11/2023
    Revision date
    Not stated

    Location: General data table; input and output tables per model column

    Retrieved

    Two-page US datasheet for the Fronius Primo 3.8-1 to 15.0-1, fetched from www.fronius.com and archived on September 24, 2026. The input and output tables set the models side by side (3.8-1, 5.0-1, 6.0-1, 7.6-1, 8.2-1 in one table; 10.0-1, 11.4-1, 12.5-1, 15.0-1 in the other) and the general data table has two columns (3.8-8.2 and 10.0-15.0), so every figure read from it is a column of a family table and the whole row is quoted. It names models, not article numbers. Its standards list is a manufacturer claim that no issuer record was read against.

    Archived copies

    Archived copy of a document published by Fronius International GmbH. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup M,06,0229,EN-US USA REV. 05/11/2023 · 1.45 MB

    Archived copy, unaltered, kept as a record of what Fronius International GmbH published. Original address: https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_EN_US.pdf. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    2
    Embedded creation date
    Embedded modification date

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: dce5591096e96987759fea1b6e190a7b6ae84c18c49a4fb5a86c8595460af25b

    Open
  • WEB
    Fronius Fronius Primo 208-240 Operating instructions (025-16102024)OfficialFroniusOfficial user manualOctober 2024
    Source details
    Revision
    025-16102024
    Revision date
    October 2024

    Archived copy captured on 2026-10-01.

    Location: Technical data section, tables headed Fronius Primo 208-240 3.8-1 / 5.0-1 / 6.0-1, 7.6-1 / 8.2-1 / 10.0-1 and 11.4-1 / 12.5-1 / 15.0-1

    Retrieved

    Fronius's own operating instructions for the Fronius Primo 208-240 (US edition), captured 1 October 2026 from manuals.fronius.com; revision printed as 025-16102024. Its technical data tables name the Primo 3.8-1, 5.0-1, 6.0-1, 7.6-1, 8.2-1, 10.0-1, 11.4-1, 12.5-1 and 15.0-1 208-240. Manufacturer instructions, not independent tests.

    Open
  • WEB
    Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture)OfficialFronius International GmbHOfficial product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Location: Technical Data table; embedded product data "ArticleNumber"

    Retrieved

    Fronius USA technical data page on www.fronius.com, captured byte for byte on September 24, 2026. The visible page prints the Fronius Primo UL family text and a technical data table for this one model. The article number 4,210,064,800 is carried in the product data the page embeds (field "ArticleNumber") and is checked against that markup (expect_html), not against visible text. Where the page and the Fronius datasheet disagree, the disagreement is written into the product identity note. The page is a technical data page, not a signed specification.

    Open

Archive and older revisions

Archive and older revisions0

Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.

Archived documents

Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023)

Archived copy of a document published by Fronius International GmbH. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup M,06,0229,EN-US USA REV. 05/11/2023 · 1.45 MB

Archived copy, unaltered, kept as a record of what Fronius International GmbH published. Original address: https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_EN_US.pdf. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
2
Embedded creation date
Embedded modification date

Embedded dates are file metadata, not independent proof of publication.

SHA-256: dce5591096e96987759fea1b6e190a7b6ae84c18c49a4fb5a86c8595460af25b

Submit a document

Warranty

Product warranty
10 years
Official datasheet
Sources

Printed as "Warranty 10 years / extensions up to 15 and 20 years available" in the Fronius Primo US datasheet, with the footnote "Fronius Limited Warranty Conditions for the USA. Different terms or restrictions may apply in other countries." The warranty document itself was not read.

Official datasheet: Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023) Rev M,06,0229,EN-US USA REV. 05/11/2023 · Checked · Earlier document

Location: Datasheet, General data, Warranty

Documented

Sellers

No sellers found.

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Price history

No seller price history.

Owner reviews

No reviews yet

Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.

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Your reviews · Review policy

Evidence score

32/100Missing details85% documented

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: Battery conversion efficiency 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 term10 years12.0 / 30.0

10 of 25 years, the best documented for an inverter (printed by the maker): APsystems DS3

Printed as "Warranty 10 years / extensions up to 15 and 20 years available" in the Fronius Primo US datasheet, with the footnote "Fronius Limited Warranty Conditions for the USA. Different terms or restrictions may apply in other countries." The warranty document itself was not read.

Official datasheet: Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023) Rev M,06,0229,EN-US USA REV. 05/11/2023 · Checked · Earlier document
Idle consumption1 W10.0 / 10.0

This is the lowest documented for an inverter in the 3.5 to 7 kW output band, printed by the maker. 3 inverters in the 3.5 to 7 kW output band share this value. The bar is a printed bound: less than 1 W, as printed.

Printed as "Night time consumption < 1 W" in the Fronius Primo US datasheet general data table, one value for all Primo models; the figure is an upper bound ("less than 1 W"), not a measured value. Printed as a bound: less than 1 W, as printed.

Official datasheet: Fronius datasheet: Fronius Primo 3.8-15.0 kW, USA (M,06,0229,EN-US, REV. 05/11/2023) Rev M,06,0229,EN-US USA REV. 05/11/2023 · Checked · Earlier document

Research pending, 0 points: Battery conversion efficiency.

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

How it works

Certificates

10 on fileUL 1741 · claimed
UL 1741-2010 Second Edition (incl. UL1741 Supplement SA 2016-09 for California Rule 21)Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "UL 1741-2010 Second Edition (incl. UL1741 Supplement SA 2016-09 for California Rule 21)" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
UL1998 (for functions: AFCI, RCMU and isolation monitoring)Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "UL1998 (for functions: AFCI, RCMU and isolation monitoring)" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
IEEE 1547-2003Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "IEEE 1547-2003" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
IEEE 1547.1-2003Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "IEEE 1547.1-2003" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
ANSI/IEEE C62.41Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "ANSI/IEEE C62.41" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
FCC Part 15 A & BProduct / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "FCC Part 15 A & B" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
NEC 2017 Article 690Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "NEC 2017 Article 690" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
C22. 2 No. 107.1-16Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "C22. 2 No. 107.1-16" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
UL1699B Issue 2 -2013Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "UL1699B Issue 2 -2013" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document
CSA TIL M-07 Issue 1 – 2013Product / system scope unresolvedClaimedListed when checked

The Fronius technical data page lists "CSA TIL M-07 Issue 1 – 2013" under its certificates and compliance with standards for Primo 3.8-1 208-240. This is recorded as the manufacturer's claim exactly as printed. No certificate number, certification body, file number or issuer directory record was read, so the listing, its scope and its current status are not independently established.

Models: Primo 3.8-1 208-240

Issued
Not stated
Valid from
Not stated
Expiry
Not stated
Issuer checked
Not checked
Official product page: Fronius Primo 3.8-1 208-240 | Fronius USA technical data page (September 24, 2026 capture) Checked · Earlier document

Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model
Primo 3.8-1 208-240

Manufacturer SKU 4,210,064,800 · US market

No historical observations recorded yet.

Community discussions

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Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

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