1. Uvod
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. Varnostna navodila
Za zmanjšanje tveganja električnega udara, požara ali poškodb vedno upoštevajte naslednje varnostne ukrepe:
- Preberite vsa navodila: Before operating the inverter, read all instructions and cautionary markings on the inverter, the batteries, and all appropriate sections of this manual.
- Kvalificirano osebje: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- Prezračevanje: Ensure adequate ventilation around the inverter. Do not install in a zero-clearance compartment.
- Izogibajte se vlagi: Do not expose the inverter to rain, snow, spray, or bilge water.
- Proper grounding: Razsmernik mora biti pravilno ozemljen.
- Varnost baterije: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Izklopite napajanje: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Značilnosti izdelka
The COTEK SP-3000-148 inverter offers the following key features:
- Čisti sinusni izhod za občutljivo elektroniko.
- 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. Izdelek je končanview
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.

Slika: Na splošno view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Zadnja plošča

Image: Rear panel of the COTEK SP-3000-148 inverter.
- AC izhodni terminal: Hardwire connection for 120VAC output.
- DIP stikala: Used for configuring output voltage in frekvenca.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Stikalo za vklop: Main ON/OFF switch for the inverter.
- LED indikatorji: Display operational status and fault conditions.
4.2 Sprednja plošča

Image: Front panel of the COTEK SP-3000-148 inverter.
- Vhodni priključki za enosmerni tok: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Namestitev
Pravilna namestitev je ključnega pomena za varno in učinkovito delovanje vašega pretvornika.
5.1 Montaža
- Lokacija: Choose a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Orientacija: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Varna montaža: 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 Ožičenje
Vsa napeljava mora biti v skladu z lokalnimi in nacionalnimi električnimi predpisi.
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 Ozemljitev
- 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 Priključitev daljinskega upravljalnika
- 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. Delovanje
6.1 Vklop/izklop
- Za vklop: 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.
- Za izklop: Flip the main power switch to the 'OFF' position. If using a remote switch, ensure it is also in the 'OFF' position.
6.2 Nastavitve stikala DIP
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 Izhod Voltage Izbira
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 Način varčevanja z energijo
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 indikatorji
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. Vzdrževanje
Redno vzdrževanje zagotavlja dolgo življenjsko dobo in zanesljivo delovanje vašega inverterja.
- Čiščenje: Zunanjost pretvornika redno čistite s suho krpo. Prepričajte se, da so prezračevalne odprtine brez prahu in umazanije. Ne uporabljajte tekočih čistil.
- Povezave: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Pregled baterije: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
8. Odpravljanje težav
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.
| Težava | Možen vzrok | rešitev |
|---|---|---|
| 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. |
| Vnos Under-Voltage Alarm | Baterija voltage prenizka. | Napolnite ali zamenjajte baterije. |
| Vhodna prekomerna glasnosttage Alarm | Baterija voltage previsoko. | Check charging system, ensure correct battery voltage. |
| Izhodna preobremenitev | Priključena obremenitev presega zmogljivost razsmernika. | Zmanjšajte skupno obremenitev, priključeno na razsmernik. |
| Previsoka temperatura | Inverter overheating due to poor ventilation or excessive load. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Kratek stik | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Specifikacije
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Funkcija | Specifikacija |
|---|---|
| Model | SP-3000-148 |
| AC Voltage | 120VAC (Selectable via DIP switch) |
| Uredba AC | ±5 % |
| Nazivna moč | 3000 W |
| Surge Power (1 Sec) | 6000 W |
| Največja izhodna moč (1 min) | 3450 W |
| Izhodna valovna oblika | Pure Sine Wave (THD<3% at nominal load) |
| Pogostost | 60Hz (Selectable via DIP switch) |
| DC Voltage | 48 VDC |
| voltage Območje | 42.0 ~ 66.0 VDC |
| Tok brez obremenitve | <1.0A @48VDC |
| Način varčevanja z energijo | <0.4A @48VDC |
| Učinkovitost (maks.) | 92 % |
| Vnos Under-Voltage Zaščita | 42.0 ± 0.5 VDC |
| Vnos Under-Voltage Alarm | 44.0 ± 0.5 VDC |
| Vnos Under-Voltage Obnovitev | 50.0 ± 0.5 VDC |
| Vhodna prekomerna glasnosttage Zaščita | 66.0 ± 1.0 VDC |
| Vhodna prekomerna glasnosttage Obnovitev | 64.0 ± 1.0 VDC |
| Izhodna preobremenitev | Shutdown output, restart to recover. |
| Izhod kratek | Shutdown output, restart to recover. |
| Previsoka temperatura | Shutdown output, auto-recovery after cooling. |
| Obratna polarnost vhoda DC | Z varovalko |
| Delovna temp. | -20°C ~ +40°C |
| Temperatura shranjevanja. & Vlažnost | -30°C ~ +70°C, 10 ~ 95% RH |
| Dimenzije (Š x V x G) | 442 x 239 x 102.5 mm (17.4 x 9.4 x 4.0 palca) |
| Teža | 8.2 kg (18.08 lbs) |
| Garancija | 2 let proizvajalec |
10. Informacije o garanciji
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a 2-letna garancija proizvajalca. 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. Podpora strankam
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.