1. Entwodiksyon
This manual provides essential instructions for the safe and efficient installation, operation, and maintenance of your COTEK SP-3000-148 High Frequency Pure Sine Wave Inverter. Please read this manual thoroughly before attempting any installation or operation to ensure proper use and to prevent potential hazards. Keep this manual for future reference.
2. Enstriksyon Sekirite
Toujou obsève prekosyon sekirite sa yo pou diminye risk chòk elektrik, dife, oswa blesi:
- Li tout enstriksyon yo: Anvan ou itilize envèstisè a, li tout enstriksyon ak mak avètisman ki sou envèstisè a, pil yo, ak tout seksyon ki apwopriye nan manyèl sa a.
- Pèsonèl kalifye: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- Vantilasyon: Asire w ke gen ase vantilasyon toutotou envèstisè a. Pa enstale l nan yon konpatiman ki pa gen espas vid.
- Evite imidite: Do not expose the inverter to rain, snow, spray, or bilge water.
- Proper grounding: Envèstisè a dwe byen konekte atè.
- Sekirite batri: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Dekonekte kouran an: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Pwodwi Features
The COTEK SP-3000-148 inverter offers the following key features:
- Sòti ond sinis pi pou elektwonik sansib.
- Power ON / OFF remote control capability via green terminal.
- Input & output fully isolation for enhanced safety.
- Temperature & load controlled cooling fan for optimal performance and longevity.
- User-friendly interface for ease of operation.
- Type 1 Indoor Aluminum Enclosure for durability and protection.
4. Pwodwi souview
The COTEK SP-3000-148 is a high-frequency pure sine wave inverter designed to convert 48VDC battery power into stable 120VAC electricity, suitable for a wide range of applications.

Imaj: An jeneral view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Panèl dèyè

Image: Rear panel of the COTEK SP-3000-148 inverter.
- AC Sòti Tèminal: Hardwire connection for 120VAC output.
- DIP switch: Used for configuring output voltage ak frekans.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Pouvwa switch: Main ON/OFF switch for the inverter.
- Endikatè ki ap dirije: Display operational status and fault conditions.
4.2 Panèl devan

Image: Front panel of the COTEK SP-3000-148 inverter.
- Tèminal Antre DC: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Enstalasyon
Proper installation is crucial for the safe and efficient operation of your inverter.
5.1 Montaj
- Kote: Choose a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Oryantasyon: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Montaj sekirite: Use appropriate fasteners to securely mount the inverter to prevent movement or vibration.

Image: Mechanical drawings with dimensions for mounting the SP-3000 series inverter.
5.2 fil elektrik
Tout fil elektrik yo dwe konfòme yo ak kòd elektrik lokal ak nasyonal yo.
5.2.1 DC Input Connection (48VDC)
- Connect the positive (+) terminal of the inverter to the positive terminal of your 48VDC battery bank.
- Connect the negative (-) terminal of the inverter to the negative terminal of your 48VDC battery bank.
- Use appropriately sized cables and fuses/breakers for the DC input circuit to prevent overcurrent.
5.2.2 AC Output Connection (120VAC Hardwire)
- Connect your AC loads to the hardwire AC output terminal block on the rear panel.
- Ensure proper polarity (Line, Neutral, Ground) for all AC connections.
- Consult a qualified electrician for hardwiring AC circuits.
5.2.3 Terre
- Connect the chassis ground terminal on the inverter's front panel to a reliable earth ground.
- This connection is essential for safety and to minimize electrical noise.
5.2.4 Koneksyon Kontwòl a Distans
- Connect an optional remote ON/OFF switch to the green terminal block on the rear panel.
- Refer to the remote control's specific instructions for wiring details.
6. Operasyon
6.1 Limen/Etenyen
- Pou limen: Ensure all connections are secure. Flip the main power switch on the rear panel to the 'ON' position. The LED indicators will illuminate to show operational status.
- Pou etenn: Flip the main power switch to the 'OFF' position. If using a remote switch, ensure it is also in the 'OFF' position.
6.2 Anviwònman DIP switch
The DIP switches on the rear panel allow configuration of the inverter's output voltage and frequency. Refer to the diagram below for specific settings. Always power off the inverter before changing DIP switch settings.

Image: COTEK SP-3000 series specifications and DIP switch settings.
6.2.1 Sòti Voltage Seleksyon
The inverter supports various output voltages (100V, 110V, 115V, 120V AC). Adjust DIP switches according to the desired output voltage as indicated in the specifications diagram.
6.2.2 Output Frequency Selection
The inverter can operate at 50Hz or 60Hz. Set the DIP switches to match the required frequency for your region or application.
6.2.3 mòd ekonomize pouvwa
The inverter features a power saving mode (High Efficiency). Refer to the diagram for enabling or disabling this feature via DIP switches.
6.3 Endikatè ki ap dirije
The inverter is equipped with LED indicators to display its operational status and alert you to potential issues. Consult the specifications diagram for a detailed explanation of each LED's meaning.
7. Antretyen
Antretyen regilye asire lonjevite ak fonksyònman serye envèstisè ou a.
- Netwayaj: Periodically clean the exterior of the inverter with a dry cloth. Ensure ventilation openings are free from dust and debris. Do not use liquid cleaners.
- Koneksyon: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Enspeksyon batri: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
NAN. Depanaj
The SP-3000-148 inverter includes several protection features. If the inverter stops operating or indicates a fault, refer to the table below for common issues and solutions.
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| No AC Output / Inverter Off | Main switch off, low battery voltage, overload, internal fuse. | Check power switch, charge batteries, reduce load, check DC input fuse. |
| Antre anba-Voltage Alam | Batri voltage twò ba. | Chaje oswa ranplase pil. |
| Antre Plis pase-Voltage Alam | Batri voltage twò wo. | Check charging system, ensure correct battery voltage. |
| Sòti Surcharge | Chaj konekte a depase kapasite envèstisè a. | Diminye chaj total ki konekte ak envèstisè a. |
| Tanperati sou | Inverter overheating due to poor ventilation or excessive load. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Kout Awondisman | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Espesifikasyon
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Karakteristik | Spesifikasyon |
|---|---|
| Modèl | SP-3000-148 |
| AC Voltage | 120VAC (Selectable via DIP switch) |
| AC Règleman | ± 5% |
| Rated pouvwa | 3000W |
| Surge Power (1 Sec) | 6000W |
| Maksimòm pwodiksyon pouvwa (1 min) | 3450W |
| Sòti Ond | Pure Sine Wave (THD<3% at nominal load) |
| Frekans | 60Hz (Selectable via DIP switch) |
| DC Voltage | 48VDC |
| Voltage Range | 42.0 ~ 66.0VDC |
| Pa gen kouran chaj | <1.0A @48VDC |
| Mode ekonomize pouvwa | <0.4A @48VDC |
| Efikasite (Max.) | 92% |
| Antre anba-Voltage Pwoteksyon | 42.0 ± 0.5VDC |
| Antre anba-Voltage Alam | 44.0 ± 0.5VDC |
| Antre anba-Voltage Rekiperasyon | 50.0 ± 0.5VDC |
| Antre Plis pase-Voltage Pwoteksyon | 66.0 ± 1.0VDC |
| Antre Plis pase-Voltage Rekiperasyon | 64.0 ± 1.0VDC |
| Sòti Surcharge | Shutdown output, restart to recover. |
| Sòti Kout | Shutdown output, restart to recover. |
| Tanperati sou | Shutdown output, auto-recovery after cooling. |
| DC Antre ranvèse polarite | Pa fuse |
| Tanperati opere. | -20 °C ~ +40 °C |
| Tanperati Depo. & Imidite | -30°C ~ +70°C, 10 ~ 95% RH |
| Dimansyon (W x H x P) | 442 x 239 x 102.5 mm (17.4 x 9.4 x 4.0 pous) |
| Pwa | 8.2kg (18.08 liv) |
| Garanti | 2 ane manifakti |
10. Enfòmasyon sou Garanti
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a 2-ane garanti manifakti. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, refer to the official COTEK warranty statement or contact customer support.
11. Sipò pou Kliyan
If you encounter any issues not covered in this manual or require technical assistance, please contact COTEK customer support. Have your product model number (SP-3000-148) and purchase information ready when contacting support.