1. Introducció
This manual provides essential information for the safe and efficient operation of your Cotek SP-3000-112 High Frequency Pure Sine Wave Inverter. This device converts 12V DC power from batteries into 120V AC power, suitable for a wide range of electronic appliances. Please read this manual thoroughly before installation and use, and retain it for future reference.
2. Informació de seguretat
Failure to follow these safety instructions may result in electric shock, fire, serious injury, or death. Always exercise caution when working with electrical equipment.
- Llegeix totes les instruccions: Before operating the inverter, read all instructions and cautionary markings on the inverter, the batteries, and all appropriate sections of this manual.
- Personal qualificat: Installation and servicing should be performed by qualified personnel familiar with batteries and inverters.
- Ventilació: Ensure adequate ventilation around the inverter. Do not install in a zero-clearance compartment.
- Eviteu l'aigua: Do not expose the inverter to rain, snow, spray, or bilge water.
- Connexió a terra adequada: L'inversor ha d'estar correctament connectat a terra.
- Seguretat de la bateria: Work near lead-acid batteries is dangerous. Batteries generate explosive gases during normal operation. Ensure proper ventilation and wear appropriate personal protective equipment.
- Desconnecteu l'alimentació: Always disconnect the battery supply before performing any maintenance or troubleshooting.
- Vol correctetage: Assegureu-vos que l'entrada de CC voltage matches the inverter's specifications (12VDC for this model).


3. Producte acabatview
3.1 Característiques clau
- Sortida d'ona sinusoidal pura per a electrònica sensible.
- Power ON / OFF remote control capability (Green Terminal).
- Input & output fully isolated for enhanced safety.
- Temperature & load controlled cooling fan for optimal performance.
- User-friendly interface with 3-color LED status indicators.
- Multiple protection features: Reverse Polarity (Fuse), Under Voltage / Over Voltage, Output Protection (Short Circuit / Overload / Over Temperature).
- E-13 / UL / CE / FCC approved.
3.2 Inverter Components




4. Configuració i instal·lació
Proper installation is crucial for the safe and efficient operation of your inverter. Refer to local electrical codes and standards.
4.1 Col·locació
- Install the inverter in a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Ensure sufficient clearance around the inverter for proper airflow, especially around the cooling fan vents.
- Mount the inverter securely on a stable, non-combustible surface.
- Avoid areas where dust, moisture, or corrosive fumes are present.
4.2 Cablejat
All wiring must comply with applicable electrical codes and be performed by a qualified electrician.
- Posada a terra: Connect the inverter's chassis ground terminal to a reliable earth ground using appropriate gauge wire.
- Connexió d'entrada de CC:
- Assegureu-vos que el volum del banc de bateriestage és 12VDC.
- Use appropriately sized cables for the DC input to minimize voltage drop and ensure safety. Refer to cable sizing charts based on current and distance.
- Connect the positive (+) terminal of the battery bank to the red (+) terminal on the inverter.
- Connect the negative (-) terminal of the battery bank to the black (-) terminal on the inverter.
- Install a DC-rated fuse or circuit breaker between the battery bank and the inverter's positive terminal, as close to the battery as possible.
- Connexió de sortida de CA:
- Connect your AC loads to the hardwire AC output terminal block.
- Ensure the total load does not exceed the inverter's continuous power rating (3000W).
- Comandament a distància (opcional): Connect the remote control unit to the RJ45 port or use the green terminal for external ON/OFF control if desired.
5. Instruccions de funcionament
5.1 Engegada/apagada
- Per encendre: Ensure all DC and AC connections are secure. Flip the main power switch on the inverter's rear panel to the 'ON' position. The Power LED indicator should illuminate.
- Per apagar: Disconnect all AC loads from the inverter. Flip the main power switch to the 'OFF' position.
5.2 Indicadors LED
The inverter features 3-color LED status indicators on the control panel (refer to Figure 4) to provide operational feedback:
- LED verd: Indicates normal operation and power output.
- LED groc: Indicates a warning condition, such as low battery voltage or high temperature. The inverter may continue to operate but requires attention.
- LED vermell: Indicates a fault condition, such as overload, short circuit, or severe over/under voltage. The inverter will shut down to protect itself and connected devices.
5.3 Configuració del commutador DIP
The DIP switches on the control panel allow for customization of certain inverter parameters, such as output voltage, frequency, and power saving mode. Refer to the detailed specifications table (Figure 5) or the product datasheet for specific configurations. Always adjust DIP switches when the inverter is powered off.
6. Manteniment
Un manteniment regular garanteix la longevitat i el funcionament fiable del vostre inversor.
- Neteja: Netegeu periòdicament l'exterior de l'inversor amb un drap sec. Assegureu-vos que les obertures de ventilació estiguin lliures de pols i residus. No utilitzeu netejadors líquids.
- Connexions: Regularly check all electrical connections (DC input, AC output, ground) for tightness and corrosion. Loose connections can cause overheating and poor performance.
- Inspecció de la bateria: Inspect batteries for signs of damage, corrosion, or electrolyte leakage. Ensure battery terminals are clean and tight.
- Medi ambient: Verifiqueu que l'entorn operatiu es mantingui dins dels rangs de temperatura i humitat especificats.
7. Solució De Problemes
Aquesta secció ofereix solucions a problemes comuns que podeu trobar. Si el problema persisteix, poseu-vos en contacte amb l'atenció al client.
| Problema | Causa possible | Solució |
|---|---|---|
| L'inversor no s'encén. | No DC input power; Loose battery connections; Blown DC fuse/breaker; Inverter switch OFF. | Comproveu el volum de la bateriatage; Tighten connections; Replace fuse/reset breaker; Turn inverter switch ON. |
| Sense sortida de CA. | Overload; Short circuit; Over-temperature shutdown; Low/High DC input voltage. | Reduce AC load; Check for short circuits in wiring/appliances; Allow inverter to cool; Check battery voltage. |
| Yellow LED illuminated. | Vol de bateria baixatage warning; High temperature warning. | Recharge batteries; Ensure adequate ventilation, reduce load. |
| Red LED illuminated / Inverter shut down. | Overload; Short circuit; Over-temperature; Under/Over voltage. | Identify and correct the fault (e.g., reduce load, fix short, allow cooling, check battery voltage), then restart the inverter. |
| El ventilador de refrigeració funciona constantment o sorollosament. | High internal temperature due to heavy load or poor ventilation. | Reduce load; Improve ventilation around the inverter. |
8. Especificacions
The following table outlines the technical specifications for the Cotek SP-3000 Series Pure Sine Wave Inverter, specifically for the SP-3000-112 model.

| Categoria | Paràmetre | SP-3000, 112 |
|---|---|---|
| Sortida | Vol. ACtage | 100/110/115/120VAC ±5% |
| Potència nominal | 3000W | |
| Surge Power (1 Sec.) | 6000W | |
| Potència de sortida màxima (1 min) | 3450W | |
| Forma d'ona de sortida | Pure Sine Wave (THD<3%) | |
| Freqüència | 50/60 Hz ±0.5% | |
| Entrada | DC Voltage | 12VDC |
| Voltage Rang | 10.5 ~ 16.5VDC | |
| Sense corrent de càrrega | <3.0A@12VDC | |
| Mode d'estalvi d'energia | <0.4A@12VDC | |
| Eficiència (màx.) | 90% | |
| Protecció | Input Under - Voltage Protecció | 10.5 ± 0.3 VCC |
| Input Under - Voltage Alarma | 11.0 ± 0.3 VCC | |
| Input Under - Voltage Recuperació | 12.0 ± 0.3 VCC | |
| Input Over - Voltage Protecció | 16.5 ± 0.3 VCC | |
| Input Over - Voltage Recuperació | 14.5 ± 0.3 VCC | |
| Sobrecàrrega de sortida | Sortida d'apagada voltage, reinicieu per recuperar-vos | |
| Resultat curt | Sortida d'apagada voltage, reinicieu per recuperar-vos | |
| Medi ambient | Temp. de funcionament. | -20 °C ~ +40 °C |
| Temp. d'emmagatzematge & Humitat | -30°C ~ +70°C, 10 ~ 95% RH | |
| General | Dimensions (A x A x P) | 442 x 214 x 102 mm (17.4 x 8.4 x 4.0 polzades) |
| Pes | 8.2 kg (18.1 lliures) | |
| Refrigeració | Ventilador de refrigeració controlat per temperatura i càrrega |

9. Garantia i Suport
9.1 Informació de la garantia
The Cotek SP-3000-112 Pure Sine Wave Inverter comes with a 2 any de garantia del fabricantAquesta garantia cobreix els defectes de materials i de fabricació en condicions d'ús normal. Si us plau, conserveu el comprovant de compra per a reclamacions de garantia.
9.2 Atenció al client
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Cotek customer support through their official website or your point of purchase. Provide your model number (SP-3000-112) and a detailed description of the issue to expedite service.





