1. Introduksjon
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. Sikkerhetsinstruksjoner
Følg alltid følgende sikkerhetsregler for å redusere risikoen for elektrisk støt, brann eller skade:
- Les alle instruksjonene: Before operating the inverter, read all instructions and cautionary markings on the inverter, the batteries, and all appropriate sections of this manual.
- Kvalifisert personell: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- Ventilasjon: Ensure adequate ventilation around the inverter. Do not install in a zero-clearance compartment.
- Unngå fuktighet: Do not expose the inverter to rain, snow, spray, or bilge water.
- Riktig jording: The inverter must be properly grounded.
- Batterisikkerhet: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Koble fra strømmen: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Produktfunksjoner
The COTEK SP-3000-148 inverter offers the following key features:
- Ren sinusbølgeutgang for sensitiv elektronikk.
- 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. Produktet er overview
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.

Bilde: Totalt sett view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Bakpanel

Image: Rear panel of the COTEK SP-3000-148 inverter.
- AC-utgangsterminal: Hardwire connection for 120VAC output.
- DIP-brytere: Used for configuring output voltage og frekvens.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Strømbryteren: Main ON/OFF switch for the inverter.
- LED-indikatorer: Display operational status and fault conditions.
4.2 Frontpanel

Image: Front panel of the COTEK SP-3000-148 inverter.
- DC-inngangsterminaler: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Installasjon
Riktig installasjon er avgjørende for sikker og effektiv drift av omformeren din.
5.1 Montering
- Sted: Choose a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Orientering: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Sikker montering: 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 Kabling
All kabling må være i samsvar med lokale og nasjonale elektriske forskrifter.
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 Jording
- 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 Remote Control Connection
- 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. Drift
6.1 Slå på/av
- For å slå på: 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.
- Slik slår du av: Flip the main power switch to the 'OFF' position. If using a remote switch, ensure it is also in the 'OFF' position.
6.2 DIP-bryterinnstillinger
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 Utgang Voltage Utvalg
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 Strømsparingsmodus
The inverter features a power saving mode (High Efficiency). Refer to the diagram for enabling or disabling this feature via DIP switches.
6.3 LED-indikatorer
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. Vedlikehold
Regelmessig vedlikehold sikrer lang levetid og pålitelig drift av omformeren din.
- Rengjøring: 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.
- Tilkoblinger: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Batteriinspeksjon: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
8. Feilsøking
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.
| Problem | Mulig årsak | Løsning |
|---|---|---|
| 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. |
| Inngang under voltage Alarm | Batteri voltage for lavt. | Lad eller bytt batterier. |
| Inngang over-voltage Alarm | Batteri voltage for høyt. | Check charging system, ensure correct battery voltage. |
| Utgang overbelastning | Tilkoblet last overstiger omformerens kapasitet. | Reduce the total load connected to the inverter. |
| Over temperatur | Inverter overheating due to poor ventilation or excessive load. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Kortslutning | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Spesifikasjoner
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Trekk | Spesifikasjon |
|---|---|
| Modell | SP-3000-148 |
| AC Voltage | 120VAC (Selectable via DIP switch) |
| AC-regulering | ±5 % |
| Nominell effekt | 3000W |
| Surge Power (1 Sec) | 6000W |
| Maksimal utgangseffekt (1 min) | 3450W |
| Utgangsbølgeform | Pure Sine Wave (THD<3% at nominal load) |
| Hyppighet | 60Hz (Selectable via DIP switch) |
| DC Voltage | 48VDC |
| Voltagog rekkevidde | 42.0 ~ 66.0 VDC |
| Ingen belastningsstrøm | <1.0A @48VDC |
| Strømsparingsmodus | <0.4A @48VDC |
| Effektivitet (maks.) | 92 % |
| Inngang under voltage Beskyttelse | 42.0 ± 0.5 VDC |
| Inngang under voltage Alarm | 44.0 ± 0.5 VDC |
| Inngang under voltage Gjenoppretting | 50.0 ± 0.5 VDC |
| Inngang over-voltage Beskyttelse | 66.0 ± 1.0 VDC |
| Inngang over-voltage Gjenoppretting | 64.0 ± 1.0 VDC |
| Utgang overbelastning | Shutdown output, restart to recover. |
| Utgang kort | Shutdown output, restart to recover. |
| Over temperatur | Shutdown output, auto-recovery after cooling. |
| DC-inngang omvendt polaritet | Med sikring |
| Driftstemp. | -20°C ~ +40°C |
| Lagringstemp. & Luftfuktighet | -30°C ~ +70°C, 10 ~ 95% RH |
| Dimensjoner (B x H x D) | 442 x 239 x 102.5 mm (17.4 x 9.4 x 4.0 tommer) |
| Vekt | 8.2 kg (18.08 lbs) |
| Garanti | 2 års produsent |
10. Garantiinformasjon
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a 2 års produsentgaranti. 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. Kundestøtte
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.