1. Sarrera
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. Segurtasun-argibideak
Beti jarraitu segurtasun neurri hauek deskarga elektriko, sute edo lesio arriskua murrizteko:
- Irakurri argibide guztiak: Inbertsoreari ekin aurretik, irakurri inbertsoreari, bateriei eta eskuliburu honetako atal egoki guztiei buruzko argibide eta abisu-marka guztiak.
- Pertsonal kualifikatua: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- Aireztapena: Ziurtatu aireztapen egokia dagoela inbertsorearen inguruan. Ez instalatu tarte libreko konpartimentu batean.
- Saihestu hezetasuna: Ez jarri inbertsoreari euri, elur, zipriztin edo sentina-uraren eraginpean.
- Lurreratze egokia: Inbertsoreak behar bezala lurrera konektatuta egon behar du.
- Bateria segurtasuna: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Deskonektatu energia: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Produktuaren ezaugarriak
The COTEK SP-3000-148 inverter offers the following key features:
- Uhin sinusoidal puruaren irteera elektronika sentikorrerako.
- Power ON / OFF remote control capability via green terminal.
- Sarrera eta irteera guztiz isolatuta segurtasun handiagoa lortzeko.
- Temperature & load controlled cooling fan for optimal performance and longevity.
- Erabiltzaileentzako interfazea erabiltzeko erraza.
- Type 1 Indoor Aluminum Enclosure for durability and protection.
4. Produktua amaitu daview
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.

Irudia: Orokorra view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Atzeko panela

Image: Rear panel of the COTEK SP-3000-148 inverter.
- AC irteerako terminala: Hardwire connection for 120VAC output.
- DIP etengailuak: Used for configuring output voltage eta maiztasuna.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Switch potentziala: Inbertsorearen ON/OFF etengailu nagusia.
- LED adierazleak: Display operational status and fault conditions.
4.2 Aurreko panela

Image: Front panel of the COTEK SP-3000-148 inverter.
- DC sarrera terminalak: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Instalazioa
Zure inbertsorearen funtzionamendu seguru eta eraginkorrerako instalazio egokia ezinbestekoa da.
5.1 Muntaketa
- Lekua: Aukeratu leku lehor eta ondo aireztatua, eguzki-argitik, bero-iturrietatik eta material sukoietatik urrun.
- Orientazioa: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Muntaketa segurua: 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 Kableatua
Kableatu guztiek tokiko eta estatuko arau elektrikoak bete behar dituzte.
5.2.1 DC sarrerako konexioa (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 Lurreratzea
- 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 Urrutiko agintearen konexioa
- 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. Funtzionamendua
6.1 Piztu/Itzaltzea
- Pizteko: 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.
- Itzaltzeko: 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 Switch ezarpenak
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 Irteera Voltage Hautaketa
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 Energia aurrezteko modua
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 adierazleak
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. Mantentzea
Mantentze-lan erregularrak zure inbertsorearen iraupena eta funtzionamendu fidagarria bermatzen ditu.
- Garbiketa: Aldian-aldian garbitu inbertsorearen kanpoaldea oihal lehor batekin. Ziurtatu aireztapen-irekiduretatik hautsik eta hondakinik gabe daudela. Ez erabili garbitzaile likidorik.
- Konexioak: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Bateriaren ikuskapena: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
8. Arazoak
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.
| Arazoa | Kausa posiblea | Irtenbidea |
|---|---|---|
| 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. |
| Sarrera-boltage Alarma | Bateria boltage baxuegia. | Kargatu edo ordeztu bateriak. |
| Sarrera bolumen gorakoatage Alarma | Bateria boltage altuegia. | Check charging system, ensure correct battery voltage. |
| Irteera gainkarga | Konektatutako kargak inbertsorearen gaitasuna gainditzen du. | Murriztu inbertsoreari konektatutako karga osoa. |
| Tenperatura gainditzea | Inbertsorearen gehiegizko berotzea aireztapen eskasagatik edo gehiegizko kargagatik. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Zirkuitu Laburra | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Zehaztapenak
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Ezaugarri | Zehaztapena |
|---|---|
| Eredua | SP-3000 148- |
| AC Boltage | 120VAC (Selectable via DIP switch) |
| AC araudia | ±% 5 |
| Potentzia nominala | 3000W |
| Piko-potentzia (1 seg) | 6000W |
| Irteerako potentzia maximoa (1 min) | 3450W |
| Irteerako uhin forma | Uhin sinusoidal purua (THD <% 3 karga nominalean) |
| Maiztasuna | 60Hz (Selectable via DIP switch) |
| DC bolumenatage | 48VDC |
| liburukiatage Barrutia | 42.0 ~ 66.0 VDC |
| Kargarik gabe | <1.0A @48VDC |
| Energia aurrezteko modua | <0.4A @48VDC |
| Eraginkortasuna (gehienez) | %92 |
| Sarrera-boltage Babesa | 42.0 ± 0.5VDC |
| Sarrera-boltage Alarma | 44.0 ± 0.5VDC |
| Sarrera-boltage Susperraldia | 50.0 ± 0.5VDC |
| Sarrera bolumen gorakoatage Babesa | 66.0 ± 1.0VDC |
| Sarrera bolumen gorakoatage Susperraldia | 64.0 ± 1.0VDC |
| Irteera gainkarga | Shutdown output, restart to recover. |
| Irteera laburra | Shutdown output, restart to recover. |
| Tenperatura gainditzea | Shutdown output, auto-recovery after cooling. |
| DC Sarrera Alderantzizko Polaritatea | Fusible bidez |
| Eragiketa Tenperatura. | -20 °C ~ +40 °C |
| Biltegiratze Tenperatura. & Hezetasuna | -30 °C ~ +70 °C, % 10 ~ % 95eko hezetasun-tenperatura |
| Neurriak (W x H x D) | 442 x 239 x 102.5 mm (17.4 x 9.4 x 4.0 hazbete) |
| Pisua | 8.2 kg (18.08 lb) |
| Bermea | 2 urteko fabrikatzailea |
10. Bermearen informazioa
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a 2 urteko fabrikatzailearen bermea. 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. Bezeroarentzako arreta
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.





