Clean power conversion
Helps turn stored battery energy into usable AC power for everyday loads, backup circuits, and off-grid applications.
1 / 16
SunGoldPower
Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V
SKU: LFP3K12V120VSG
$859.00
$1,074.00
Save $215.00
In Stock
No sales tax collected at checkout where applicable.
Estimated delivery
Calculating current delivery window…
Secure checkoutProtected payment
Free shippingView shipping policy
Eligible returnsView return policy
Authorized dealerSunGoldPower warranty
Need help choosing?
Find the right setup for you.
Talk it through with our team, or size your system with the Power Planner.
Call 1-844-747-6767
Open Power Planner
SunGoldPower Solar Inverter
Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V
The Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V is a dependable inverter charger option for battery-backed power systems. It is made for customers who need clean AC output, strong surge handling, and a practical way to support backup, mobile, workshop, or off-grid power needs.
3000W120VSingle PhaseIn StockSKU LFP3K12V120VSG
Built for battery systems
A practical match for solar storage builds where the inverter needs to work smoothly with a dedicated battery bank.
Ready for real loads
Designed for customers powering appliances, tools, electronics, and essential circuits instead of small one-off devices.
Built to anchor your power system
Low-frequency inverter systems are often chosen when the load profile is heavier and surge demand matters. This model is positioned for practical energy systems where steady output, battery support, and real-world reliability are more important than a tiny lightweight footprint.
- Use it as the core conversion point for a battery-backed power system.
- A practical fit for backup power, off-grid power, workshops, mobile builds, and residential energy projects.
- Helps keep system design cleaner when you need dependable AC output from stored energy.
Size the inverter
Our RV inverter sizing guide explains continuous watts, startup loads and battery-side demand before choosing an RV inverter.
Compare before you choose
Compare continuous AC output, battery voltage, surge behavior and PV or charger functions for the intended installation.
See the Low Frequency Inverter 3000W-DC24V (single phase) AC input 120V AC output 120V for another SunGoldPower inverter option.
Package Includes
1x Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V
Includes the selected item based on the current package option.
| Low Frequency Inverter 3000W-DC12V (single phase) AC input 120V AC output 120V | |
| Selected variant SKU | LFP3K12V120VSG |
|---|---|
| MODEL | |
| Model / SKU | LFP3K12V120VSG |
| Product Type | Inverter |
| ELECTRICAL | |
| Continuous AC Output | 3,000 W |
| Output Waveform | Pure sine wave |
| Inverter Type | Low-frequency inverter, battery charger, and automatic transfer switch |
| Output Frequency | 50/60 Hz ±0.3 Hz |
| Peak Inverter Efficiency | Greater than 88% |
| Line-Mode Efficiency | Greater than 95% |
| Typical Transfer Time | 10 ms maximum |
| Battery Charging | Three-stage intelligent charger with 0%-100% adjustable current and 9 selectable battery settings |
| Input Priority | AC priority by default; battery priority selectable with DIP switch SW5 |
| Surge Output | 9,000 W for 20 seconds |
| AC Input Voltage | 120 V AC |
| AC Output Voltage | 120 V AC |
| Nominal DC Input Voltage | 12.0 V DC |
| Minimum Start Voltage | 10.0 V DC |
| Low-Battery Alarm | 9.5-10.0 V DC |
| Low-Battery Trip | 9.0-9.5 V DC, selectable with SW1 |
| High-Voltage Alarm | 16.0 V DC |
| Low-Battery Restart Voltage | 13.0 V DC |
| Power-Saver Idle Consumption | 20 W |
| Charger Rating | 90 A ±5 A |
| Selectable AC Input Range | 90-135 V AC or 100-135 V AC, selected with SW2 |
| Overcharge Shutdown Voltage | 15.7 V |
| Peak AC Output | 9,000 W |
| Battery Voltage | 12 VDC |
| AC Input / Output Voltage | 120 VAC |
| Battery Charger | 90 A |
| Input Frequency Range | Narrow: 47-55±0.3Hz for 50Hz, 57-65±0.3Hz for 60Hz |
| Listed Output | 3000W |
| PHYSICAL | |
| Dimensions | 22 × 9.1 × 7.5 in |
| Unit Weight | 49 lb |
| Shipping Dimensions | 26.8 × 13.4 × 13 in |
| Shipping Weight | 57.3 lb |
| OPERATING LIMITS | |
| Protections | AC overvoltage, AC undervoltage, low-battery alarm, high-battery alarm, overtemperature, overload, short circuit, and backfeed protection |
| Maximum Operating Ambient Temperature | 122°F (50°C) |
| Standard Warranty | 1 year |
Frequently Asked Questions
Clear answers to common questions about this product, setup, compatibility, and use.
What should a buyer understand first about the LFP3K12V120VSG's architecture?
It converts a 12V battery system into the AC output stated on the listing. Treat charging, transfer, solar input, monitoring, and grid interaction as separate capabilities unless the exact model documentation explicitly includes them.
Can a small 12V battery support the LFP3K12V120VSG at full AC load?
The 12V bank must support the inverter's continuous DC demand, startup surge, and conversion loss without exceeding battery or BMS limits. Size parallel batteries, busbars, short copper conductors, lugs, disconnects, and fusing as one high-current circuit.
How should 120V loads be divided on the LFP3K12V120VSG?
This listing is identified for 120V output. Verify appliance voltage, frequency, neutral and grounding requirements, and any hardwire or transfer limits before connecting it to a distribution system.
Which cold-weather solar limit matters on the LFP3K12V120VSG?
Do not infer a solar input from the word inverter. Confirm the exact listing and manual for MPPT hardware; otherwise use a separate controller matched to the array and 12V battery bank.
Who should commission the LFP3K12V120VSG in a whole-home installation?
No inverter should be assumed suitable for unrestricted grid export or direct panel connection. Confirm the LFP3K12V120VSG's listed operating modes, transfer rating, neutral-ground behavior, overcurrent protection, rapid-shutdown or disconnect requirements, permits, and utility rules with a qualified installer.