
SunGoldPower | 4000W DC 48V Split Phase Pure Sine Wave Inverter With Charger | UL1741 Standard
High-Performance Inverter for Off-Grid, Backup, and Renewable Energy Systems

The LFP Series 4000W DC 48V Split Phase Pure Sine Wave Inverter With Charger is a robust all-in-one solution that delivers clean, reliable power for homes, cabins, and backup power systems. Combining a pure sine wave inverter, smart battery charger, and automatic AC transfer switch, this unit offers flexibility, durability, and high efficiency.
Certified to UL1741 standards, it ensures safety and compliance for grid-tied and off-grid use. With a low-frequency design, this inverter can handle heavy-duty appliances with ease, while providing both 120V and 240V split-phase output. Ideal for powering tools, appliances, pumps, and electronics.
Key Features:
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4000W Split-Phase Pure Sine Wave Inverter
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48VDC Input with 120V/240V AC Output
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UL1741 Standard Compliant for enhanced safety and reliability
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Low-Frequency Design for high surge capacity and long-term durability
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Built-In AC Battery Charger with Adjustable Charging Current (0% to 100%)
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AC/Battery Priority Selector via SW5 Switch
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50Hz/60Hz Selectable Output Frequency via SW4 Switch
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Automatic Generator Start Functionality for uninterrupted power
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Low Idle Power Draw for increased system efficiency
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BTS Cable and Remote Control Included

The SunGoldPower LFP 4000 Watt DC 48V AC 120/240 Split Phase Inverter Charger is a premier, low-frequency power inverter designed for residential, commercial, and mobile applications such as RVs, trailers, and boats. It serves as an ideal solution for off-grid systems or emergency backup power.
This split-phase inverter accepts 240VAC input and delivers 110/120V or 220/230/240VAC output, with the flexibility to produce 50Hz or 60Hz via the SW4. Its design enables the provision of two legs of 110V, making it suitable for setups with a 220-panel configuration.
This versatile product offers three primary functions:
- Inverter: Converts stored 48V DC power from batteries into AC electricity to power various tools and appliances.
- Built-in 40 amp battery charger: Facilitates grid or generator recharging of the battery system.
- Transfer switch: Enables seamless automatic switching between shore power and battery power within 10 milliseconds.







Specifications
MODEL | 4000W DC 48V Split Phase |
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Inverter Output: | |
Continuous Output Power | 4000W |
Surge Rating | 12000W (20 Seconds) |
AC Output | AC 120V and AC 240V |
AC Input | 240V |
Output Wave | Pure Sine Wave (bypass mode) |
Typical Transfer Time | 10ms (MAX) |
Nominal Efficiency | >88% |
DC Input: | |
Nominal Input Voltage | 48.0Vdc |
Minimum Start Voltage | 40.0Vdc |
Low Battery Alarm | 42.0Vdc-44.0Vdc |
Low battery Trip | 40.0Vdc-42.0Vdc (select by SW1) |
High Voltage Alarm | 64.0Vdc |
Low battery Voltage Restart | 52Vdc |
*Idle Consumption | 48W |
Power Saver Mode Idle Consumption | 19W |
AC Charger : | |
Charger Rate | 40+/-5A |
AC input Range (Grid or Generator) | 140V-270VAC/184V-253VAC (select by SW2) |
Over Charge Protection Shutdown | 62.8V |
Selectable Charge Setting based on battery type | |
Adjustable charge current | off 0%-100% |
3-step intelligent battery charger | |
Packaging: | |
4000W 48V Low Frequency Pure Sine Inverter | |
English Manual | |
Remote Control | |
BTS Cable | |
Unit Weight | 55 LB |
Unit Size | 22 x 9.1 x 7.5 inch |
Shipping Weight | 64 LB |
Shipping Size | 27 x 13.4 x 13 inch |
Manuals and Downloads
DOWNLOAD LFP 4KW 48V PURE SINE WAVE SPLIT INVERTER/CHARGER DATA SHEET
FAQ
1.) What is the AC output current?
Dear Customer, the output current is 16A. The load should not exceed 4000W for a 240V AC load or 2000W for a 120V AC load. This is a split-phase inverter, so power will be divided to 2x2000W when using 120V output. Thank you for your understanding.
2.) What is the maximum charging voltage for this inverter?
Dear Customer, the inverter has overcharge protection that activates if the voltage exceeds 62.8V. Thank you.
3.)Can it charge seven modules of a Nissan Leaf battery (56 volts, 66Ah) (1 module: 8V, 66Ah)?
Dear Customer, please refer to the battery type selector in the manual. You will need to adjust the switch position according to your battery voltage. The total battery voltage must not exceed 48V. You can download the manual from the technical specifications section of the product page. Thank you.
Warranty
2 Year Warranty
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Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
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Yes! All products on Solar Guys Pro are 100% brand-new and in perfect condition.
We do not sell any used or refurbished items.
Frequently Asked Questions

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