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SunGoldPower 4000W DC 12V Pure Sine Wave Inverter With Charger

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LFP4K12V120VSG

$1,020.00
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SunGoldPower Inverter Charger | 4000W Pure Sine Wave | 12V DC–120V AC

High-Power Low-Frequency Inverter Charger for Off-Grid & Backup Energy Systems

The SunGoldPower LFP4K12V120VSG is a powerful 4000W pure sine wave inverter charger designed to deliver reliable, utility-grade power for off-grid homes, RVs, workshops, and emergency backup systems. Built on a durable low-frequency architecture, this all-in-one unit integrates a DC–AC inverter, intelligent high-capacity battery charger, and automatic AC transfer switch into a single streamlined solution.

Engineered for efficiency and long-term reliability, the LFP Series inverter features low idle power consumption, advanced charging controls, and complete system monitoring—making it ideal for demanding power applications where stability and efficiency matter most.

Key Features

  • 4000W Low-Frequency Pure Sine Wave Output: Delivers clean, stable 120VAC power suitable for sensitive electronics, household appliances, and power tools.
  • All-in-One Inverter Charger System: Combines inverter, smart charger, and automatic transfer switch for seamless transitions between AC input and battery power.
  • 12VDC Battery Input / 120VAC Output: Designed for 12V battery banks commonly used in RV, marine, and backup power systems.
  • Selectable Output Frequency: Supports 50Hz or 60Hz operation via SW4 switch for flexible regional compatibility.
  • AC / Battery Priority Selection: Defaults to AC priority, with the option to switch to battery priority using the SW5 switch.
  • Adjustable Charging Current: Easily adjust charging current from 0% to 100% to match battery capacity and charging requirements.
  • High-Capacity Smart Multi-Stage Charger: Integrated 120A ±5A charger with multi-stage charging logic and charger-disable option for advanced system control.
  • Wide Battery Compatibility: Supports 7 battery types, including LiFePO₄, AGM, Gel, and lead-acid batteries.
  • Automatic Generator Start (AGS): Automatically starts and stops a generator based on battery voltage for fully automated backup operation.
  • Fast AC Transfer Time: Typical 10ms transfer time ensures uninterrupted power during source switching.
  • Low Idle Power Consumption: Energy-efficient standby operation reduces battery drain and maximizes runtime.
  • Advanced Monitoring & Control: Includes remote control and Battery Temperature Sensor (BTS) for safer, more accurate battery charging.

Ideal Applications

  • Off-grid homes and cabins
  • RVs, trailers, and mobile workstations
  • Backup power for homes and offices
  • Solar and battery-based energy systems
  • Tools, electronics, and household appliances

What’s Included

  • 1 × SunGoldPower LFP4K12V120VSG 4000W Pure Sine Wave Inverter Charger
  • 1 × Remote Control
  • 1 × Battery Temperature Sensor (BTS) Cable
  • 1 × English User Manual

Specification Sheets:

SunGoldPower 4000W DC 12V Pure Sine Wave Inverter With Charger Specifications (PDF)

Manuals:

SunGoldPower 4000W DC 12V Pure Sine Wave Inverter With Charger Installation Guide & Owner Manual (PDF)

Specifications

Parameter Specification
General
ModelLFP4K12V120VSG
Main Features
Inverter Type4000 W Low Frequency Pure Sine Inverter with Charger
Priority SelectionAC / Battery Priority Selector
Generator SupportAutomatic Generator Start
Output ProtectionGFCI Socket
Appliance CompatibilityPowers all types of appliances
Display & ControlLCD Display, Remote Control
Idle PowerLow Idle Consumption
Charger Battery Types9 selectable battery type settings
Charging MethodMulti-stage smart charger (120 A ±5 A, disableable)
Transfer Time10 ms (typical)
Inverter Output
Continuous Output Power4000 W
Surge Rating12,000 W (20 seconds)
AC Output Voltage120 VAC
AC Input Voltage120 VAC
Output WaveformPure Sine Wave (bypass mode)
Typical Transfer Time10 ms (max)
Nominal Efficiency> 88%
DC Input
Nominal Input Voltage12.0 VDC
Minimum Start Voltage10.0 VDC
Low Battery Alarm10.5–11.0 VDC
Low Battery Trip10.0–10.5 VDC (selectable by SW1)
High Voltage Alarm16.0 VDC
Low Battery Restart Voltage13.0 VDC
Idle Consumption45 W
Power Saver Off Idle Power18 W
AC Charger
Charger Rate120 A ±5 A
AC Input Range (Grid/Generator)90–135 VAC or 100–135 VAC (selectable by SW2)
Overcharge Protection Shutdown15.7 V
Charge SettingSelectable based on battery type
Adjustable Charge CurrentOff / 0%–100%
Charging Method3-step intelligent battery charger
Packaging
Included ItemsInverter, English Manual, Remote Control, BTS Cable
Unit Weight62.2 lb
Unit Dimensions (L×W×H)25.6 × 9.1 × 7.5 in
Shipping Weight71 lb
Shipping Dimensions (L×W×H)30.3 × 13.4 × 12.8 in

Understanding Your Power Needs

Power Calculation Guide

Sizing Metric Formula & Example
Energy Consumption (Wh) Formula: Watts × Hours
Example: 60W × 4 hrs = 240 Wh
Battery Capacity (Ah) Formula: Watt-hours ÷ System Voltage (V)
Example: 240 Wh ÷ 12V = 20 Ah
Inverter Size (W) Formula: Total Watts × 1.25 (safety margin)
Example: 300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W) Formula: Sum of all appliance watts used simultaneously
Example: Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery Formula: (Battery Ah × Voltage) ÷ Total Load (W)
Example: (100Ah × 12V) ÷ 240W = 5 hrs

Find Your Power Match

Need / Application System Recommendation
Basic lighting + phone charging Recommended Battery: 50Ah – 100Ah (12V)
Inverter Size: 100W – 200W
Notes: For small backup setups
Home office (laptop, fan, TV) Recommended Battery: 150Ah – 200Ah (12V or 24V)
Inverter Size: 500W – 1000W
Notes: For moderate usage with 4–6 hours of backup
Home backup (fridge, lights) Recommended Battery: 200Ah+ (24V or 48V recommended)
Inverter Size: 1000W – 1500W
Notes: Ideal for longer backups or heavier loads
Business / shop power backup Recommended Battery: 300Ah+ (48V system)
Inverter Size: 2000W – 3000W
Notes: Suitable for commercial setups or extended power outages

Why Shop With Us

  • Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products backed by full manufacturer warranties.
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  • Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just experts who know off-grid power systems.
  • Expert Energy Guidance: Our solar and backup energy specialists are here to help with system design, product questions, and installation tips.
  • USA-Based Service: Local, knowledgeable, and friendly support right here in the U.S.
  • Secure Payments: Shop confidently with encrypted, secure checkout protecting your personal and payment information.
  • Built for Energy Independence: Whether powering a cabin, prepping for emergencies, or going off-grid, our products are chosen for performance, reliability, and sustainability.

SunGoldPower 4000W DC 12V Pure Sine Wave Inverter With Charger

$1,020.00