SunGold Power 18KW 48V Split Phase Inverter

The SunGold Power 18KW 48V Split Phase Inverter Supplies 18000 Watts of Pure Sine Power and a 54KW Surge for Heavy Motor and Whole-Home Loads

The SunGold Power 18KW 48V Split Phase Inverter is the 18.0KW model in SunGold's LF-PV Series of low-frequency inverter chargers, sold alongside 12KW and 15KW versions. It brings a pure sine wave inverter, an AC battery charger and an auto-transfer switch together in one unit, running on a 48V battery bank and delivering 120V and 240V split phase output.

It needs a 240V grid or generator input and comes without MPPT, so solar charging is handled by a separate controller. SunGold lists it for refrigerators, freezers, microwaves, dryers, air conditioners, pumps and other big home and business loads.

SunGold Power 18KW 48V Split Phase Inverter Features

18KW Continuous and 54KW Surge

The inverter carries 18.0KW of continuous load and a 54.0KW surge for 20 seconds. That headroom matters when several large motors, such as air conditioners and pumps, share one system.

100A Bypass Breaker

SunGold's manual rates the bypass breaker on the 18KW at 100A, compared with 80A on the 15KW and 60A on the 12KW. The charger has its own 100A breaker.

95A Charger With PFC

The AC battery charger is rated 95±5Amp. Power factor correction keeps the charger's power factor close to 1, and a linear switch can reduce the charge current for a smaller bank. Choosing 0 on the battery type selector turns the charger off.

Inverter-Preferred UPS Configuration

With SW5 set to battery priority, the inverter normally supplies the loads and an internal transfer switch moves them to utility power if the inverter output is interrupted. That transfer is typically 6ms, short enough that sensitive loads usually do not notice it.

Three-Fan Cooling

The 12KW to 18KW models use two controlled DC fans and one AC fan. Fan speed rises smoothly with heat sink temperature, charge current and load, and SunGold targets a noise level under 60dB at 1m.

Generator Start, Remote and BTS

The inverter can start a compatible generator at its low battery alarm and stop it once charging finishes. The remote control and battery temperature sensor cable come in the box.

Coated Electronics and Built-In Protections

The PCB has a conformal coating for water, rust and dust resistance. Protections cover AC input over and under voltage, low and high battery, over temperature, overload, short circuit and backfeed.

Real-World Applications

Large off-grid homes. Run a 240V panel with heating, cooling and kitchen loads from a 48V bank charged by a separate solar controller and a generator.

Whole-home backup. Switch an entire house to battery power during outages and back to the grid automatically.

Business sites. Keep refrigeration, pumps and 240V equipment running when utility power fails.

Generator-backed systems. Let the inverter start the generator when the bank runs low, with a 15-second delay before loads transfer.

How It Compares to Common Alternatives

Versus the 15KW model. SunGold's manual rates the 15KW at 15.0KW continuous and 45.0KW surge, with an 80A bypass breaker and 225W idle draw with power saver off. This model adds 3KW of output and a 100A bypass breaker, with 270W idle draw.

Versus the 12KW model. The 12KW is rated 12.0KW and 36.0KW, with a 60A bypass breaker, an 80A charger breaker and a 115±5Amp charger. It fits systems with lighter loads.

Versus an all-in-one solar inverter. This inverter has no MPPT, so you pick the solar charge controller separately. That keeps the inverter and the solar side independent.

Is This Split Phase Inverter the Right Fit

• Battery bank. Requires a 48V bank and a solid DC connection. SunGold lists 1/0AWG x 3 for runs up to 1m and 2/0AWG x 3 for 1 to 5m.
• AC input. 240V only, not suitable for 120V input. Input wiring is two hot lines plus ground.
• 120V circuits. When one hot line feeds 120V loads, it can carry at most half the rated capacity.
• Phase. Dual phase 120V and 240V only. It cannot connect to a multiple phase system.
• Installation. Indoor use only, wall mounted, 197 LB and 28.7 x 16.5 x 8.7 inches.

This may be a good fit if

• Your loads need up to 18KW continuous
• You start several large motors
• Your system runs on a 48V bank
• You charge from a 240V grid or generator

Common Questions

Can I Use It on a Multiple Phase Service?

No. Its output is dual phase only, 120V and 240V, so it cannot work with a multiple phase system.

Is There an Adjustable Charge Curve for Lithium Batteries?

It works with lithium batteries through the LiFePO4 battery type. The charge and discharge voltages themselves cannot be adjusted.

How Much Power Does It Use at Idle?

It draws 50W with power saver on and 270W with power saver off.

What Happens If the Battery Cables Are Reversed?

The inverter is not reverse polarity protected. Reversing the battery connections causes permanent damage that is not covered under warranty, so always check polarity first.

Can It Run From a Generator?

Yes. A generator setting on SW2 accepts a wider input voltage and frequency, and a 15-second delay lets the generator stabilize before the transfer.

What's Included

• 1 x 18000W 48V Split Phase Pure Sine Wave Power Inverter (LFPV18K48V240VSP)
• 1 x English Manual
• 1 x Remote Control
• 1 x BTS Cable

Headroom for Heavy Split Phase Loads

The SunGold Power 18KW 48V Split Phase Inverter pairs 18.0KW of 120V and 240V pure sine wave output with a 54.0KW surge, a 100A bypass breaker and a 95A charger. At Outbound Power, we help customers plan large inverters, 48V battery banks and generators for whole-home power. If you have questions, our team is happy to help.

SunGold Power LFPV18K48V240VSP Manual