1. Увод
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. Безбедносна упутства
Увек се придржавајте следећих мера предострожности како бисте смањили ризик од струјног удара, пожара или повреда:
- Прочитајте сва упутства: Before operating the inverter, read all instructions and cautionary markings on the inverter, the batteries, and all appropriate sections of this manual.
- Квалификовано особље: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- вентилација: Ensure adequate ventilation around the inverter. Do not install in a zero-clearance compartment.
- Избегавајте влагу: Do not expose the inverter to rain, snow, spray, or bilge water.
- Proper grounding: Инвертор мора бити правилно уземљен.
- Безбедност батерије: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Искључите напајање: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Карактеристике производа
The COTEK SP-3000-148 inverter offers the following key features:
- Чисти синусни излаз за осетљиву електронику.
- 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. Производ је готовview
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.

Слика: Укупно view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Задња плоча

Image: Rear panel of the COTEK SP-3000-148 inverter.
- Излазни терминал наизменичне струје: Hardwire connection for 120VAC output.
- ДИП прекидачи: Used for configuring output voltagе и фреквенција.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Прекидач: Main ON/OFF switch for the inverter.
- ЛЕД индикатори: Display operational status and fault conditions.
4.2 Предња плоча

Image: Front panel of the COTEK SP-3000-148 inverter.
- Улазни терминали једносмерне струје: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Инсталација
Proper installation is crucial for the safe and efficient operation of your inverter.
5.1 Монтажа
- Локација: Choose a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Оријентација: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Сигурна монтажа: 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 Ожичење
Све ожичење мора бити у складу са локалним и националним електричним прописима.
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 Уземљење
- 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 Повезивање са даљинским управљачем
- 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. Операција
6.1 Укључивање/искључивање
- За укључивање: 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.
- За искључивање: Flip the main power switch to the 'OFF' position. If using a remote switch, ensure it is also in the 'OFF' position.
6.2 Подешавања ДИП прекидача
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 Оутпут Волtagе Избор
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 Режим уштеде енергије
The inverter features a power saving mode (High Efficiency). Refer to the diagram for enabling or disabling this feature via DIP switches.
6.3 ЛЕД индикатори
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. Одржавање
Regular maintenance ensures the longevity and reliable operation of your inverter.
- Чишћење: 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.
- Везе: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Инспекција батерије: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
КСНУМКС. Решавање проблема
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.
| Проблем | Могући узрок | Решење |
|---|---|---|
| Нема излаза наизменичне струје / Инвертор је искључен | Main switch off, low battery voltage, overload, internal fuse. | Check power switch, charge batteries, reduce load, check DC input fuse. |
| Инпут Ундер-Волtagе Аларм | Баттери волtagе прениско. | Напуните или замените батерије. |
| Инпут Овер-Волtagе Аларм | Баттери волtagе превисоко. | Check charging system, ensure correct battery voltage. |
| Оутпут Оверлоад | Connected load exceeds inverter's capacity. | Смањите укупно оптерећење повезано на инвертор. |
| Овер Температуре | Inverter overheating due to poor ventilation or excessive load. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Кратки спој | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Спецификације
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Феатуре | Спецификација |
|---|---|
| Модел | СП-КСНУМКС-КСНУМКС |
| АЦ Волtage | 120VAC (Selectable via DIP switch) |
| АЦ Регулатион | ±5% |
| Називна снага | 3000В |
| Surge Power (1 Sec) | 6000В |
| Максимална излазна снага (1 мин) | 3450В |
| Оутпут Вавеформ | Pure Sine Wave (THD<3% at nominal load) |
| Фреквенција | 60Hz (Selectable via DIP switch) |
| ДЦ Волtage | 48ВДЦ |
| Волtagе Распон | 42.0 ~ 66.0ВДЦ |
| Струја без оптерећења | <1.0A @48VDC |
| Режим уштеде енергије | <0.4A @48VDC |
| Ефикасност (макс.) | 92% |
| Инпут Ундер-Волtagе Заштита | 42.0 ± 0.5ВДЦ |
| Инпут Ундер-Волtagе Аларм | 44.0 ± 0.5ВДЦ |
| Инпут Ундер-Волtage Oporavak | 50.0 ± 0.5ВДЦ |
| Инпут Овер-Волtagе Заштита | 66.0 ± 1.0ВДЦ |
| Инпут Овер-Волtage Oporavak | 64.0 ± 1.0ВДЦ |
| Оутпут Оверлоад | Shutdown output, restart to recover. |
| Оутпут Схорт | Shutdown output, restart to recover. |
| Овер Температуре | Shutdown output, auto-recovery after cooling. |
| Обрнути поларитет ДЦ улаза | По осигурачу |
| Радна темп. | -20°Ц ~ +40°Ц |
| Температура складиштења. & Влажност | -30°C ~ +70°C, 10 ~ 95% RH |
| Димензије (Ш к В к Д) | 442 к 239 к 102.5 мм (17.4 к 9.4 к 4.0 инча) |
| Тежина | 8.2 кг (18.08 лбс) |
| Гаранција | 2 година произвођача |
10. Информације о гаранцији
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a 2-годишња гаранција произвођача. 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. Корисничка подршка
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.