1. Муқаддима
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. Дастурамал оид ба бехатарӣ
Барои кам кардани хатари зарбаи барқ, сӯхтор ё ҷароҳат ҳамеша чораҳои бехатарии зеринро риоя кунед:
- Ҳама дастурҳоро хонед: Before operating the inverter, read all instructions and cautionary markings on the inverter, the batteries, and all appropriate sections of this manual.
- Кадрҳои соҳибихтисос: All electrical work should be performed by qualified personnel familiar with battery and inverter systems and their installation.
- Вентилятсия: Ensure adequate ventilation around the inverter. Do not install in a zero-clearance compartment.
- Аз намӣ худдорӣ кунед: Do not expose the inverter to rain, snow, spray, or bilge water.
- Заминакунии дуруст: The inverter must be properly grounded.
- Бехатарии батарея: Work in a well-ventilated area when working with batteries. Wear eye protection and protective clothing. Avoid touching eyes while working near batteries.
- Хомӯш кардани барқ: Before performing any maintenance or cleaning, disconnect all power to the inverter.

Image: Always use appropriate safety equipment when working with electrical systems.
3. Хусусиятҳои маҳсулот
The COTEK SP-3000-148 inverter offers the following key features:
- Pure sine wave output for sensitive electronics.
- 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. Маҳсулот ба охир расидview
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.

Тасвир: Умуман view of the COTEK SP-3000-148 Pure Sine Wave Inverter.
4.1 Панели пушти

Image: Rear panel of the COTEK SP-3000-148 inverter.
- Терминали баромади AC: Hardwire connection for 120VAC output.
- Гузаришҳои DIP: Used for configuring output voltagд ва басомад.
- Remote Control Port (Green Terminal): For connecting an optional remote ON/OFF switch.
- Калиди барқ: Main ON/OFF switch for the inverter.
- Нишондиҳандаҳои LED: Display operational status and fault conditions.
4.2 Панели Асосӣ

Image: Front panel of the COTEK SP-3000-148 inverter.
- DC Input Terminals: Positive (+) and Negative (-) terminals for 48VDC battery connection.
- Chassis Ground Terminal: For connecting the inverter to earth ground.
5. Насбкунӣ
Proper installation is crucial for the safe and efficient operation of your inverter.
5.1 Васлкунӣ
- Ҷойгиршавӣ: Choose a dry, well-ventilated area, away from direct sunlight, heat sources, and flammable materials.
- Самт: Mount the inverter horizontally on a flat, stable surface. Ensure adequate clearance around the unit for proper airflow.
- Монтажи бехатар: 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 Ноқилҳо
Ҳамаи симкашӣ бояд ба қоидаҳои барқии маҳаллӣ ва миллӣ мутобиқат кунад.
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 Ба заминканӣ
- 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 Пайвастшавӣ бо идоракунии дурдаст
- 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. Амалиёт
6.1 Фурӯзон/хомӯш кардан
- Барои фаъол кардан: 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.
- Барои хомӯш кардани барқ: Flip the main power switch to the 'OFF' position. If using a remote switch, ensure it is also in the 'OFF' position.
6.2 Танзимоти Калиди 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 Чилди баромадtage Интихоб
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 Ҳолати сарфаи барқ
The inverter features a power saving mode (High Efficiency). Refer to the diagram for enabling or disabling this feature via DIP switches.
6.3 Нишондиҳандаҳои LED
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. Нигоҳдорӣ
Regular maintenance ensures the longevity and reliable operation of your inverter.
- Тозакунӣ: Қисми берунии инверторро мунтазам бо матои хушк тоза кунед. Боварӣ ҳосил кунед, ки сӯрохиҳои вентилятсия аз чанг ва партовҳо холӣ ҳастанд. Аз тозакунандаҳои моеъ истифода набаред.
- Пайвастшавӣ: Regularly check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Санҷиши батарея: Inspect your battery bank regularly for corrosion, damage, or signs of leakage.
8. Баррасии мушкилот
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.
| Мушкилот | Сабаби эҳтимолӣ | Ҳалли |
|---|---|---|
| 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. |
| Вуруди зери ҷилдtagҳушдор | Ҳаҷми батареяtagд хеле паст. | Батареяҳоро пур кунед ё иваз кунед. |
| Вуруди барзиёдtagҳушдор | Ҳаҷми батареяtagд хеле баланд. | Check charging system, ensure correct battery voltage. |
| Сарбории изофаи баромад | Connected load exceeds inverter's capacity. | Reduce the total load connected to the inverter. |
| Ҳарорати аз ҳад зиёд | Inverter overheating due to poor ventilation or excessive load. | Ensure adequate ventilation, reduce load, allow inverter to cool. |
| Расми кӯтоҳ | Short circuit detected on AC output. | Identify and clear the short circuit on the AC output wiring or load. |
9. Мушаххасоти
The following table details the technical specifications for the COTEK SP-3000-148 Pure Sine Wave Inverter:
| Хусусият | Мушаххасоти |
|---|---|
| Модели | SP-3000-148 |
| Ҷилди ACtage | 120VAC (Selectable via DIP switch) |
| Танзими AC | ±5% |
| Қувваи номиналӣ | 3000 Вт |
| Surge Power (1 Sec) | 6000 Вт |
| Қувваи ҳадди аксар (1 дақиқа) | 3450 Вт |
| Шакли мавҷи баромад | Pure Sine Wave (THD<3% at nominal load) |
| Басомад | 60Hz (Selectable via DIP switch) |
| Ҷилди DCtage | 48VDC |
| Ҷилдиtage Диапазон | 42.0 ~ 66.0VDC |
| Ҷараёни сарборӣ нест | <1.0A @48VDC |
| Ҳолати сарфаи барқ | <0.4A @48VDC |
| Самаранокӣ (макс.) | 92% |
| Вуруди зери ҷилдtage Муҳофизат | 42.0 ± 0.5VDC |
| Вуруди зери ҷилдtagҳушдор | 44.0 ± 0.5VDC |
| Вуруди зери ҷилдtage Барқароркунӣ | 50.0 ± 0.5VDC |
| Вуруди барзиёдtage Муҳофизат | 66.0 ± 1.0VDC |
| Вуруди барзиёдtage Барқароркунӣ | 64.0 ± 1.0VDC |
| Сарбории изофаи баромад | Shutdown output, restart to recover. |
| Натиҷаи кӯтоҳ | Shutdown output, restart to recover. |
| Ҳарорати аз ҳад зиёд | Shutdown output, auto-recovery after cooling. |
| Қутбияти баръакси вуруди DC | Бо сутунмӯҳра |
| Ҳарорати корӣ. | -20°C ~ +40°C |
| Ҳарорати нигоҳдорӣ. & Намӣ | -30°C ~ +70°C, 10 ~ 95% RH |
| Андозаҳо (W x H x D) | 442 x 239 x 102.5 мм (17.4 x 9.4 x 4.0 инч) |
| Вазн | 8.2 кг (18.08 фунт) |
| Кафолат | Истеҳсолкунандаи 2 сол |
10. Маълумот дар бораи кафолат
The COTEK SP-3000-148 Pure Sine Wave Inverter comes with a Кафолати 2-солаи истеҳсолкунанда. 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. Дастгирии муштариён
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.