Southeastern Power Products SEP-7.0 Marine Diesel Generator – Radiator Cooled
Gain self-contained radiator-cooled auxiliary boat generation with Southeastern Power SEP-7.0 Generator, producing 7kW of 1800 RPM diesel power via an integrated radiator system for workboats without through-hull raw water plumbing.
- 7kW output powers cabin heating circuits
- Mounted radiator eliminates raw seawater plumbing
- Kubota 3-cylinder diesel provides low fuel burn
- 1800 RPM operation extends commercial lifespan
Description
Deliver seven continuous electrical kilowatts without seawater lines through the Southeastern Power Products SEP-7.0 Marine Generator, engineered with an integrated radiator cooling setup for dry-engine vessel compartments and mobile maritime trailers. Generating 7.0 kW continuous output at 120V and 240V 60Hz, this plant powers galley refrigeration, battery banks, and lighting circuits without thru-hull plumbing fittings.
A water-cooled three-cylinder Kubota diesel engine pairs with an engine-mounted radiator core and heavy cooling fan on a steel drip pan base. The synchronous four-pole alternator features 100 percent copper windings coated with Class H epoxy insulation, resisting high humidity and salt atmospheres. Weighing 415 lbs dry, the radiator-cooled chassis perimeter measures 33.5 inches long by 20.0 inches wide by 25.0 inches high.
Key Features of Southeastern Power Products SEP-7.0
Vessel owners who buy Southeastern Power Products SEP-7.0 marine generator units acquire radiator-cooled commercial power equipment built to eliminate thru-hull seawater fittings completely. This closed cooling circuit operates independently of external water sources, making it suited for upper-deck machinery spaces and containerized marine kitchens.
- 7.0 kW continuous electrical output powers galley cooktops, water heaters, and vessel battery chargers on long runs.
- 8.5 kVA surge capacity starts inductive marine air conditioning pumps and deep freezer compressors without stalling.
- Integrated radiator core and pusher fan eliminate thru-hull seacocks, sea strainers, and raw-water pump impellers.
- Kubota three-cylinder diesel block provides smooth mechanical balance and low rotational vibration.
- SEP-7.0 radiator cooled platform provides reliable electrical power during vessel dry-dock refit periods.
- Brushless synchronous alternator eliminates carbon brushes and slip rings to minimize maintenance requirements.
- Elastomeric vibration dampening mounts decouple engine vibrations from commercial aluminum and steel vessel hulls.
- Automated emergency safety sensors shut down fuel delivery upon high engine coolant temperature or low oil pressure.
Transient Load Step Voltage Tolerances
Operating at an acoustic signature of 62 dB(A) at 23 feet, this radiator-cooled generator provides steady electrical output in well-ventilated top-deck compartments. The automatic voltage regulator limits output voltage variation within 2 percent of 120V and 240V standards at 60 Hz during heavy motor starts. Diesel fuel burn measures 0.48 GPH at 50 percent load, providing high operational fuel economy.
Radiator Air Ducting Compartment Fitment
Install the unit in machinery compartments possessing dedicated intake and exhaust air ducting sized to handle radiator heat discharge, maintaining 18 inches of clearance around the radiator face. Route dry exhaust piping through a heat-blanketed industrial silencer. The isolated DC ground design prevents stray currents from causing structural hull electrolysis.
Physical Handling Radiator Service Protocols
Single-side maintenance access permits checking engine oil and fuel filters without removing radiator shrouds. This radiator-cooled unit is not engineered for sealed bilge compartments lacking high-volume air ducting, nor for wet exhaust systems requiring cooling water injection.
- Check radiator coolant level and inspect fan belt tension before each shift.
- Drain engine crankcase oil and replace spin-on filter cartridges every 100 runtime hours.
- Blow compressed air through radiator exterior cooling fins every 250 runtime hours.
Manufacturer Warranty Factory Package Manifest
Southeastern Power Products backs this generator with a 2-Year commercial warranty protecting the Kubota engine, radiator core, and alternator assembly. The shipment contains the Southeastern Power Products SEP-7.0 generator, remote control panel, dry exhaust connection flange, rubber isolator set, and technical instruction guide.
SEP-7.0 Radiator Cooled Diesel Generator 7.0 kW 60 Hz Specs
| Brand / Manufacturer | Southeastern Power Products / Phasor Marine |
| Full Model Code | SEP-7.0kW / SEP3-7.0 KW (120/240V Layout) |
| Generator Type | Industrial / Standby Radiator-Cooled Stationary Diesel Generator Set |
| Prime Power Output | 7.0 kW (7,000 Continuous Watts) |
| AC Voltage & Frequency | 120V / 240V AC Single Phase @ 60 Hz (Three-Phase Options Available) |
| Amperage Output | 58.0 Amps @ 120V / 29.0 Amps @ 240V |
| Engine Type & Model | Kubota D1005-E3BG Naturally Aspirated 3-Cylinder Diesel Engine |
| Engine Performance Core | 13.1 HP @ 1,800 RPM Governed Synchronous Speed (Bore & Stroke: 2.99" x 2.90") |
| Displacement Size | 1.00 Liter (61.08 cubic inches) |
| Cooling System Type | Integrated Industrial Unit Radiator with Engine-Driven Fan Array |
| Starting & Charging | 12V DC Electric Starter Motor with Onboard System Battery Charging Alternator |
| Alternator Spec Core | Stamford/Newage Single Bearing Direct Coupled Brushless Generator with Brushless Exciter |
| Fuel System Infrastructure | 5/16" Inlet Port, 3/16" Return Line, Fuel Transfer Pump, and Spin-on Fuel Filter Module |
| Safety Management Systems | Automatic Engine Shutdown Overrides (Low Lubricating Oil Pressure / High Coolant Temperature) |
| Chassis & Architecture | Heavy-Duty Welded Steel Structural Base Frame with 4-Point Isolation Mount Arrays |
| Included Kit Equipment | Start/Stop/Preheat Toggle Controls with Hour Meter (Machine Mounted) & Residential Muffler (Shipped Loose) |
| Dimensions L x W x H | 1016 mm x 508 mm x 737 mm (40.0" x 20.0" x 29.0") |
| Net Weight | 249.5 kg (550.0 lbs) Dry Base Mass Weight |
| Ideal Application | Perfect for residential emergency backup, small off-grid estates, or stationary marine configurations needing a clean radiator loop independent of external raw-water intake lines. |












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