Generator entity · Inverter (portable)
Generac iQ3500
Compact 120 V inverter: 3,000 W running / 3,500 W starting on gasoline, 5-20R and L5-30R outlets, COsense CO shutdown, and 14.1 h at 25% load on the 2.6 gal tank — 49.5 kg. No official noise figure and no numeric THD published.
Machine summary · generator · generac-iq3500
- brand
- Generac
- model_name
- iQ3500 (Model 7723)
- generator_type
- inverter_portable
- fuel
- gasoline
- running_watts
- 3000
- starting_watts
- 3500
- voltage
- 120V
- co_shutdown
- present
- rv_outlet_present
- false
- weight_kg
- 49.5
- confidence_level
- medium
- source_last_checked
- 2026-07-08
- json_export
- /generators/generac-iq3500.json
Overview
The iQ3500 is Generac's high-output 120 V recreational/backup inverter: 3,000 W running / 3,500 W starting on gasoline (the product page's 'Starting Watts: 0' is an obvious page error, corrected here from the official spec sheet). Its 212 cc engine feeds a 120 V panel with a 5-20R household duplex and an L5-30R twist-lock, plus USB-A and parallel-connection ports. Generac's COsense monitors carbon monoxide and shuts the engine down; that is recorded as present, though at medium confidence because the model-specific manual revision at the official URL omits the COsense section (the branding and function come from Generac's COsense documentation). Runtime is 14.1 h at 25% / 8.9 h at 50% load on the 2.6 gal tank. Generac publishes no dBA noise figure for this model and no numeric THD (only a '<3%' upper bound in marketing), so both are recorded as unknown rather than invented.
Variant note: Model 7723 (7723-1 is the 50-State config). Parallel kit is 7668. Not conflated with lower-output iQ models.
Data note: Confidence medium for two documented gaps: (1) the COsense CO-shutdown section is absent from the model-specific manual revision at the official URL — coShutdown 'present' rests on Generac's COsense branding and function description; noted plainly rather than blocked, since this is an inverter marketed and sold as a COsense unit. (2) No official dBA noise figure exists anywhere → noiseDb null, noiseClass unknown. THD stored null: Generac states only a '<3%' upper bound in marketing, not a numeric spec — per policy 'clean power' / bounded claims never become a THD number; inverter → sensitive-electronics suitability medium (not high). RUNTIME CONFLICT preserved: spec sheet (2024 Rev C) 8.9 h at 50% vs owner's manual 8.0 h — newer spec sheet used, both noted. Product page 'Starting Watts: 0' is a page error, corrected from the spec sheet's 3,500 W. carbCompliant true / epaCertified true per the 7723-1 50-State configuration.
Specifications
Running and starting watts are never collapsed; every runtime figure carries its fuel and load basis; THD is shown only when officially stated numerically. Core values' original claims and sources are in the provenance table. The final group is computed from the fields above and marked as derived.
| Attribute | Value |
|---|---|
| Running (rated) watts | 3,000 W |
| Starting (peak) watts | 3,500 W |
| Voltage | 120V |
| Frequency | 60Hz |
| Total harmonic distortion | Not numerically stated |
| 240V support | No |
| Attribute | Value |
|---|---|
| Fuel | Gasoline |
| Fuel tank (gasoline) | 2.6 gal |
| Runtime — Gasoline, 25% load | 14.1 h |
| Runtime — Gasoline, 50% load | 8.9 h |
| Fuel notes | Gasoline runtime 14.1 h at 25% / 8.9 h at 50% load on the 2.6 gal tank per the 2024 Rev C spec sheet. CONFLICT: the owner's manual lists 8.0 h at 50% — the newer spec sheet's 8.9 h is used and both are preserved. No official dBA noise figure published anywhere. |
| Attribute | Value |
|---|---|
| Engine displacement | 212 cc |
| Noise | No dBA with stated basis published |
| Start method | recoil, electric |
| Parallel capable | Yes |
| Inverter technology | Yes |
| Attribute | Value |
|---|---|
| Receptacles | 2 × 5-20R (one 120V 20A household duplex (two outlets)), 1 × L5-30R (120V 30A twist-lock), 1 × USB-A (USB charging port) |
| RV outlet (30A RV receptacle) | No |
| TT-30R present | No |
| L14-30R present | No |
| GFCI outlets | No |
| Attribute | Value |
|---|---|
| CO shutdown | Automatic CO shutdown present (COsense) |
| Low-oil shutdown | Yes |
| Overload protection | Yes |
| EPA certified | Yes |
| CARB compliant | Yes |
| Attribute | Value |
|---|---|
| Weight (dry) | 49.5 kg (109.1 lb) |
| Dimensions (L × W × H) | 601 × 457.6 × 552.4 mm |
| Type | Inverter (portable) · Enclosed / suitcase |
| Attribute | Value |
|---|---|
| Watts per kg | 60.6 W/kg |
| Runtime per gallon @ 50% load | 3.4 h/gal |
| Portability band | mid |
Use cases
- Recreation and tailgating: high-output 3,500 W 120 V in a suitcase inverter
- Essential-circuit 120 V backup via the L5-30R twist-lock
- Sensitive electronics on inverter power (though THD is not published numerically)
- Extended running: 14.1 h at 25% load on the 2.6 gal tank
Cross-category fit flags (stored for future battery-vs-generator pages, not yet used for ranking): RV not suitable · camping suitable · home backup suitable · apartment use: no · sensitive electronics: medium · noise class: unknown.
Strengths and weaknesses
Strengths
- High output for a suitcase inverter: 3,500 W starting on 120 V
- COsense carbon-monoxide auto-shutdown
- L5-30R twist-lock plus a household duplex; parallel capable (kit 7668)
- 50-State: EPA certified and CARB compliant (7723-1 config)
- 14.1 h at 25% load runtime
Weaknesses
- No official dBA noise figure published — noise is unknown, excluded from ranking
- No numeric THD (only a '<3%' marketing upper bound) — sensitive-electronics suitability capped at medium
- 120 V only; no TT-30R and no 240 V — not RV-outlet equipped, limited home backup
- CO documentation gap: the model-specific manual revision omits the COsense section (confidence medium)
- Product page erroneously shows 'Starting Watts: 0' — corrected from the spec sheet
Comparisons featuring this generator
Compact Quiet Inverter Generators: Honda EU2200i vs EU2200i Companion vs WEN 56235iX vs Generac iQ3500
Four sub-3,500 W 120 V inverter generators built for quiet recreation, camping, and light backup — all with documented CO-shutdown. They separate on output (1,800–3,000 W running), noise basis (Honda and WEN publish load-based dBA; Generac publishes none), documented THD (only WEN gives a number), weight (17.7–49.5 kg), and receptacle panel.
Where to buy
Merchant links are scaffolded but not yet active. When live, some will be affiliate links; merchant relationships never affect indexed specifications or verdicts.
- Official product page: https://www.generac.com/residential-products/portable-generators/3500-portable-inverter-generator-with-cosense-50st-7723/
- Amazon: link pending — Affiliate link placeholder — not yet active
Sources and provenance
Core specifications — including all safety fields — come from official manufacturer sources only, with the exact claim text preserved per field. Safety-related fields carry the strictest rules: CO-shutdown status is never inferred from marketing. See the methodology for the full policy.
| Field | Normalized value | Raw claim | Source | Confidence |
|---|---|---|---|---|
runningWatts | 3000 | Rated (Running) Watts: 3000 | Official datasheet (PDF) — Gasoline headline. | high |
startingWatts | 3500 | Starting Watts: 3500 | Official datasheet (PDF) — The product page shows 'Starting Watts: 0' — an obvious page error; spec sheet 3,500 W used. Never collapsed with running watts. | high |
voltage | 120V | Rated Voltage: 120V | Official datasheet (PDF) — 120 V only; no 240 V receptacle. | high |
receptacleSummary | {"5-20R":2,"L5-30R":1,"USB-A":1} | 120V 20A Duplex (5-20R) ... 120V 30A Twist-Lock (L5-30R) ... USB ... Parallel connection ports | Official datasheet (PDF) — No TT-30R → rvOutletPresent=false. Parallel ports feed the optional parallel kit, not counted as standard receptacles. | high |
fuelTankCapacityGal | 2.6 | Fuel Tank Capacity: 2.6 gal | Official datasheet (PDF) | high |
runtimeAt25LoadHours | 14.1 | Run Time at 25% Load: 14.1 hrs | Official datasheet (PDF) — Load basis explicit. | high |
runtimeAt50LoadHours | 8.9 | Run Time at 50% Load: 8.9 hrs (2024 Rev C spec sheet) | Official datasheet (PDF) — CONFLICT: owner's manual lists 8.0 h at 50%. Newer spec sheet's 8.9 h used; both preserved. Never merged with the 25% figure. | medium |
noiseDb | — | (no dBA figure published in any official Generac source) | Official datasheet (PDF) — No official dBA anywhere → null, not invented; noiseClass unknown. | high |
totalHarmonicDistortion | — | less than 3% THD (marketing upper bound, no numeric spec) | Official product page — Only a '<3%' upper bound is marketed, not a numeric spec-table THD → null per policy; inverter → sensitive-electronics suitability medium. | medium |
coShutdown | present | COsense technology detects rising levels of carbon monoxide and automatically shuts down the generator. | Official product page — Basis: Generac COsense branding + function description. The model-specific manual revision at the official URL omits the COsense section — hence medium confidence; noted plainly, not blocked (documented feature, not ambiguous status). | medium |
engineSizeCc | 212 | Engine Displacement: 212 cc | Official datasheet (PDF) — Generac OHV engine. | high |
weightKg | 49.5 | Dry Weight: 109.1 lb (49.5 kg) | Official datasheet (PDF) — Explicitly dry. | high |
dimensionsMm | {"l":601,"w":457.6,"h":552.4} | Dimensions (L x W x H): 23.66 x 18.02 x 21.75 in | Official datasheet (PDF) — Converted ×25.4. | high |
warrantyYears | 3 | Warranty: 3-Year Limited (residential) | Official datasheet (PDF) | high |
carbCompliant | true | 50-State / CARB compliant (7723-1 configuration) | Official datasheet (PDF) — EPA certified true; CARB compliant true for the 50-State config. | high |
All sources used
- https://www.generac.com/residential-products/portable-generators/3500-portable-inverter-generator-with-cosense-50st-7723/
- https://www.generac.com/globalassets/products/residential/portable-generators/spec-sheets/7723-iq3500-cosense-portable-generator-spec-sheet.pdf
- https://www.generac.com/globalassets/products/residential/portable-generators/spec-sheets/7723-iq3500-cosense-portable-generator-spec-sheet.pdf (official manual)