Skip to content
Sitewide SALE: 100 OFF on select brands + Free Shipping* on select items. Price Match Guarantee on all products. Some exclusions apply.
Sitewide SALE: 100 OFF on select brands + Free Shipping* on select items. Price Match Guarantee on all products. Some exclusions apply.
SunGoldPower Three-Phase All-in-One Solar Charge Inverter 18kW 48V - PowerCore 18K-48

SunGoldPower Three-Phase All-in-One Solar Charge Inverter 18kW 48V - PowerCore 18K-48

by SunGoldPower
SKU PowerCore 18K-48
Save 20% Save 20%
$4,994.00
$4,994.00 - $4,994.00
$4,994.00
$3,995.00
$3,995.00 - $3,995.00
$3,995.00
  • Authorized online dealer
  • Transparent pricing. Any delivery cost is confirmed before processing*
  • Typical delivery 4 to 7 business days on standard shipments*
  • Price Match Guarantee. We beat verified prices
  • 30 day returns on eligible items
  • Manufacturer warranty included
  • No sales tax in most states*

Questions? Text or call +1 (307) 248-7227

*Exclusions apply. Freight, oversized items, made-to-order items, or remote delivery may require additional delivery time and cost confirmation. See Shipping and Returns.

Price Match Guarantee at OffGrid Lux

At OffGrid Lux, we're committed to offering you the best prices online. That's why we have a Price Match Guarantee in place. If you find a lower price for the same product elsewhere, we'll match or beat it to ensure you get the best value.

For full details on our Price Match Guarantee, including eligibility criteria and how to request a price match, please click here to view our complete policy.

Shipping & Order Policy at OffGrid Lux

When you place an order, we confirm stock availability before charging your card. Orders typically process within 1-2 business days, and shipping is fast—most orders arrive within 4-7 days. We use reliable third-party carriers and provide tracking information promptly.

For more details, click here to view our full Shipping Policy.

Refunds & Returns at OffGrid Lux

We're committed to your happiness with every purchase. Need assistance? Just reach out. You have 30 days from delivery to return items in their original condition. We process refunds promptly, usually within 3 business days of receiving your return.

For more info, check out our full Returns & Refunds Policy here.

SunGoldPower PowerCore 18K-48 - 18kW 48V Three-Phase Solar Charge Inverter

Build a high-capacity three-phase off-grid solar power system for commercial buildings, farms, workshops, or facilities with demanding electrical loads. The PowerCore 18K-48 combines a pure sine wave inverter, dual solar MPPT charge controllers and battery charging functions in a single unit. It delivers 18,000 watts of rated AC output at 120/208V three-phase and accepts up to 28.8kW of connected photovoltaic input.

Typical applications include pumps, refrigeration, compressors, fans, lighting and other compatible three-phase equipment. The unit provides a main load output plus a configurable generator/smart-load port for system designs that require priority loads or generator support.

SunGoldPower PowerCore 18K-48 official feature illustration 1

SunGoldPower PowerCore 18K-48 official feature illustration 2

Key Features

  • 18kW rated output: Three-phase pure sine wave AC output at 120/208V, 50/60Hz, with short-duration surge capacity up to twice rated power for 10 seconds.
  • Dual MPPT solar charging: Two independent MPPT trackers accept up to 14.4kW of PV each, 28.8kW combined. Maximum PV input voltage is 600V DC.

SunGoldPower PowerCore 18K-48 official feature illustration 3

SunGoldPower PowerCore 18K-48 official feature illustration 4

  • 48V energy storage: Designed for a nominal 48V battery bank (40–60V operating range); supports lithium-ion, lead-acid and configurable battery types, with compatible BMS communication.
  • Multiple charging and operating modes: Solar-only and combined PV/utility charging, programmable charging schedules, utility bypass, and battery-backed inverter operation.

SunGoldPower PowerCore 18K-48 official feature illustration 5

SunGoldPower PowerCore 18K-48 official feature illustration 6

  • Smart generator / secondary load port: Configurable port can serve a generator input or a secondary load output depending on installation settings.
  • Expandable power: Parallel operation supported for up to six compatible PowerCore units using the manufacturer's required parallel wiring and configuration.

SunGoldPower PowerCore 18K-48 official feature illustration 7

SunGoldPower PowerCore 18K-48 official feature illustration 8

  • Monitoring and protections: LCD status display; RS485, CAN and USB interfaces; Wi-Fi capability and protection functions for overload, short circuit, abnormal voltage and overheating.

SunGoldPower PowerCore 18K-48 official feature illustration 9

SunGoldPower PowerCore 18K-48 official feature illustration 10

SunGoldPower PowerCore 18K-48 official feature illustration 11

SunGoldPower PowerCore 18K-48 official feature illustration 12

Technical Specifications

Model PowerCore 18K-48
Inverter type All-in-one solar charge inverter; three-phase pure sine wave
Rated AC output 18,000 W (18 kW)
Maximum AC output 19,800 VA
Peak output Up to 2x rated power for 10 seconds
Rated AC output voltage 120/208 VAC, three phase (L1 + L2 + L3 + N + PE)
Output frequency 50 / 60 Hz
Rated AC output current 50 A
Nominal battery voltage 48 V DC
Battery operating range 40–60 V DC
Supported battery types Lithium-ion, lead-acid, or user-defined
Maximum battery charge/discharge current 360 A DC
Solar PV input capacity 28.8 kW maximum (14.4 kW + 14.4 kW)
MPPT trackers 2 independent inputs
Maximum PV input current 36 A + 36 A
PV start-up voltage 100 V DC
Maximum PV input voltage 600 V DC
MPPT operating voltage 120–550 V DC
Grid / generator AC input 120/208 VAC three phase, 50/60 Hz
Continuous AC pass-through current 100 A
Maximum inverter efficiency 97.6%
MPPT tracking efficiency Greater than 99%
Parallel expansion 1–6 compatible units
Dimensions (W × H × D) 23.36 × 33.40 × 8.47 in
Net weight 118 lb
Environmental rating IP20 - indoor use only
Operating temperature 14°F to 131°F (-10°C to 55°C); power derating above 113°F (45°C)
Cooling / sound Intelligent air cooling; less than 60 dB
Communication interfaces RS485, CAN, USB, dry contact; Wi-Fi capability
Standards referenced by manufacturer IEC 62109-1, IEC 62109-2, UL 1741; EN 61000-6-1/-6-3, FCC Part 15 Class B; RoHS

SunGoldPower PowerCore 18K-48 official technical illustration 1

SunGoldPower PowerCore 18K-48 official technical illustration 2

SunGoldPower PowerCore 18K-48 official technical illustration 3

SunGoldPower PowerCore 18K-48 official technical illustration 4

SunGoldPower PowerCore 18K-48 official technical illustration 5

SunGoldPower PowerCore 18K-48 official technical illustration 6

Documents -

Installation and Compatibility Notes

  • Important: This inverter is designed for 120/208V three-phase output. It is not a standard 120/240V residential split-phase inverter. Confirm load voltage, phase configuration and system requirements before purchasing.
  • Indoor installation only: IP20-rated unit. Mount it on a suitable solid wall in a dry, adequately ventilated location.
  • Panel string design must respect the 600V maximum PV open-circuit input limit and 120–550V MPPT operating range. Confirm cold-weather open-circuit voltage and component compatibility.
  • Use appropriately sized overcurrent protection, grounding, wiring and batteries. Follow the official manual and applicable electrical codes; installation should be carried out by a qualified professional.
  • This listing is for the PowerCore 18K-48 inverter. Solar panels, battery storage and other system components are separate unless expressly stated in the order.

Specifications are based on SunGoldPower's official PowerCore 18K-48 data sheet and user manual. Manufacturer specifications and included accessories may be revised. Consult the current documentation and confirm system suitability before installation.

Free Shipping & No Tax to the United States

Enjoy Free Shipping on Orders Over $200. No Sales Tax (Excludes WY).

in stock and ready to ship

Shop High-Quality Items in Stock
Get Free 30-Day Returns if Unsatisfied.

Guaranteed Lowest Prices

Rest assured, we offer the lowest prices available. Explore our Price Match Policy for unbeatable savings.

Excellent Customer Service

Questions? Give us a call +1(307) 248-722

Let customers speak for us

from 47 reviews
Good communication

Good communication. Order arrived on time.

Anonymous
Pain free transaction and fast

Pain free transaction and fast delivery!

Tracy Frenzel
I bought a refrigerator/freezer for my off grid truck

I bought a refrigerator/freezer for my off grid truck, I can now go off grid for several days.

Darold Dahse
The staff at off grid luxury were great at keeping me updated on my order

The staff at off grid luxury were great at keeping me updated on my order.

Michael Hope

Very good

Jean
Eahora Electric Bike Juliet Pro II Dual 2200W Motor 220 Mile Range
Best

Best forever

IM
Milky Day Electric Cream Separator Milky Fj 350 EAR (115V)
Great Shopping Experience I had a great experience shopping with Offgrid Lux

Great Shopping Experience

I had a great experience shopping with Offgrid Lux. The product was exactly as described, the quality was excellent, and everything arrived in good condition. The ordering process was easy and the service was professional. I’m very happy with my purchase and would definitely shop with Offgrid Lux again. Highly recommended!

IM

Great communication and so far it’s great

Tom Davison
PECRON F3000LFP Portable Power Station 3600W 3072Wh
fast shipping

fast shipping, great prices compared to other websites!!!

Anonymous
on the ball

From day one when I ordered a eahora romeo 2 2025 off grid lux has been in constant contact . From shipping the bike to after care I haven't had issues at all . They even called me to check on an issue I had and I actually spoke to a person , who was great by the way . Customer service has fallen to the big internet conglomerates but I didn't feel that way with the purchase , they have really tried to take care of me and answered every question I've asked , even ones that are stated on the site . Im happy I went with them .I hope I can purchase other stuff in the future here .
The products won't be flawless but their customer service is . Thanks again Greg

greg decedue
Eahora Romeo Pro II 2025 Ebike 52V Dual 2000W Motors 200 Miles
If you are professional or a weekend smoker

If you are professional or a weekend smoker.this is a most have. One bit of advise learn the air

Eric Lister
Damaged upon arrival, stellar customer service

Mototec Raider, paid for assembly, arrived with flat tire, dangling cracked headlight, scratched and scuffed. Customer service very responsive and able to resolve issues and make it right. They answer the phone and actually talk to you!
Recommended!

Edmund Siragusa
Extra battery for Ecotric Leopard

I bought an extra battery to increase my ebike range. Of all the sites I looked at, I was sure this one would fit my battery mount because it was labeled correctly. Not true of other sites. They shipped quickly and the battery was packed properly. Good business--would easily buy from this site again.

Mitchell Stocker
Received product in a timely

Received product in a timely fashion

Daniel Marck
Amazing ribs

Well built and easy to operate and clean. Effortless cooking and amazing pork ribs.

Anonymous
Old Country BBQ Pits Insulated Gravity Fed Charcoal Smoker GF-L-34X40

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare
Clicky