Sol-Ark 18kW Hybrid On/Off-Grid Inverter Battery Charger

Description

The Sol-Ark 18K-2P hybrid on/off-grid inverter delivers reliable whole-home backup, exceptional efficiency, and unmatched flexibility for both grid-tied and off-grid systems. With 18 kW of continuous output and 36 kW surge capacity, it can easily power demanding appliances like air conditioners, pumps, and heavy equipment. Designed to maximize solar integration, the 18K-2P supports over 40 kW of PV through AC coupling and offers three independent MPPT channels for versatile array configurations. Its 48 V battery compatibility with up to 350 A charge/discharge ensures scalable energy storage for any household need.

Built for resilience, the 18K-2P features 97.6% peak efficiency, ultra-fast 5 ms transfer time, and a 200 A grid pass-through for seamless operation during outages. The rugged NEMA 3R/IP65-rated enclosure withstands harsh climates from –40 °C to +60 °C, while stackability up to 12 units allows system expansion. Certified to UL 1741, IEEE 1547-2018, and AFCI standards, it comes with a standard 10-year warranty for peace of mind. Easy-to-use monitoring through the MySol-Ark platform provides real-time visibility and control, making this inverter a powerful, future-ready solution for energy independence and home resilience.

Product Specifications

Sol-Ark 18kW Hybrid On/Off-Grid Inverter Battery Charger Product Specifications

Manufacturer:	Sol Ark
Model:	SA-18k, SA-18K-2P-N
Solar DC Power:	SOLAR DC POWER
Max allowed PV power:	32,400 watts
Max. Usable PV Power:	28,800 watts
Max. AC Coupled Input:	19,200 watts
Max PV power to battery & AC outputs:	18,000 watts
Max DC Voltage:	500V@36A
MPPT Voltage range:	150V - 425V
Starting voltage:	125V
Max. Operating Input Current per MPPT:	36A
Max. Short Circuit Current per MPPT:	54A
Number of MPPT:	3/2
Solar Strings per MPPT:	2 without fuses, or 3 with fuses
Max DC current per MPPT:	36A@500V, 54A@400V (self limiting)
Max AC Coupled Input:	19,200W (Micro/String Inverters)
AC POWER:	AC POWER
AC Output On-Grid:	18,000 watts
AC Output Off Grid:	18,000 watts
Surge Power (10s):	36,000 watts
Connections:	120/240/208V split phase
Max. Output Current:	75A
Frequency:	60/50Hz
Max efficiency:	97.6%
Stackable:	Yes; Max 12
Response time:	5ms Grid-Tied to Off-Grid
Sell back power modes:	Limited to Household or Full Grid-Tied
Design (DC to AC):	Transformer-less DC
Power Factor:	+-0.9 - 1.0
BATTERY:	BATTERY
Battery Types:	Lead Acid or Lithium Li-Ion
Nominal DC input:	48V
Capacity:	50 - 9900Ah
Voltage range:	40 - 60V
Continuous Battery charging output:	350A
External temperature sensor:	Included
Current shunt:	Integrated for accurate % SOC
External Generator Start:	Integrated based on voltage or % SOC
Li-Ion Communication:	CanBus & RS485 MODBUS for Lithium battery
General:	GENERAL
Display:	Color touch
Weight:	137 lbs
Dimensions:	(H x W x D) 34.0 x 18.3 x 11.1 inches, 863 x 464 x 282 mm
Enclosure:	IP65, NEMA type 3R (indoor / outdoor)
Temperature:	-40 to 60C; >45C derating; (3 variable speed fans)
Warranty:	10 years
Wi-Fi Communication:	Included for monitoring or SW updates
Snap on sensors:	Included, for limited selling to household
PROTECTION:	PROTECTION
Certifications:	UL1741 3rd SB, UL1741 CRD-PCS, IEEE1547-2018 and interoperability using IEEE2030.5, Hawaiian Electric SRD V2.0, UL1699B PVDC AFCI, UL1998, CSA C22.2 No. 107
Grid Sell Back:	UL1741-2010/2018, IEEE1547a-2003/2014, FCC 15 class B, UL1741SA, CA Rule 21, HECO Rule 14H
PV DC Disconnect:	Integrated switch NEC 240.15
Ground Fault Detection:	Integrated NEC 690.5
Surge Protection:	DC Type II / AC Type II
PV rapid shutdown control:	Integrated NEC 690.12
PV Arc Fault detection:	Integrated NEC 690.11; UL1699B
PV input lightning protection:	Integrated
AC input/output breakers:	Integrated 200A
Battery Disconnect:	Integrated breaker
Solar Flare EMP Hardened:	OPTIONAL to 2015 MIL-STD 461G (Independently tested June 2018)

Product Manuals

Sol-Ark 18kW Hybrid On/Off-Grid Inverter Product Manual

Product Warranty

Limited Warranty: Sol-Ark 12K-2P-N
10-Year Limited Warranty for Sol-Ark LLC Products. Sol-Ark LLC provides a Ten-year (10) limited
Warranty ("Warranty") against defects in materials and workmanship for its Sol-Ark LLC products
("Product"). The term of this warranty begins on the Product(s) initial purchase date, or the date
of receipt of the Product(s) by the end user, whichever is later. This must be indicated on the
invoice, bill of sale from your installer. This warranty applies to the original Sol-Ark LLC Product
purchaser and is transferable only if the Product remains installed in the original use location.
Please call Sol-Ark LLC to let us know if you are selling your Home and give us name and contact
of the new owner.
The warranty does not apply to any Product or Product part that has been modified or damaged by the following:
• Installation or Removal (examples: wrong voltage batteries, connecting batteries backward, damage due to water/rain to
electronics, preventable damage to solar wires.)
• Alteration or Disassembly.
• Normal Wear and Tear.
• Accident or Abuse.
• Unauthorized Firmware updates/software updates or alterations to the software code.
• Corrosion.
• Lightning: unless using EMP hardened system, then Sol-Ark LLC will repair the product.
• Repair or service provided by an unauthorized repair facility.
• Operation or installation contrary to manufacturer product instructions.
• Fire, Floods, or Acts of Nature.
• Shipping or Transportation.
• Incidental or consequential damage caused by other components of the power system.
• Any product whose serial number has been altered, defaced, or removed.
• Any other event not foreseeable by Sol-Ark LLC
Sol-Ark LLC liability for any defective Product, or any Product part, shall be limited to the repair or replacement of the Product, at Sol-Ark
LLC discretion. Sol-Ark LLC does not warrant or guarantee workmanship performed by any person or firm installing its Products. This warranty
does not cover the costs of installation, removal, shipping (except as described below), or reinstallation of Products or parts of Products. LCD
screen and fans are covered for 5 years from date of purchase.
THIS LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY APPLICABLE TO SOL-ARK LLC PRODUCTS. SOL-ARK LLC EXPRESSLY DISCLAIMS
ANY OTHER EXPRESS OR IMPLIED WARRANTIES OF ITS PRODUCTS. SOL-ARK LLC ALSO EXPRESSLY LIMITS ITS LIABILITY IN THE EVENT
OF A PRODUCT DEFECT TO REPAIR OR REPLACEMENT IN ACCORDANCE WITH THE TERMS OF THIS LIMITED WARRANTY AND
EXCLUDES ALL LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY LIABILITY FOR
PRODUCTS NOT BEING AVAILABLE FOR USE OR LOST REVENUES OR PROFITS, EVEN IF IT IS MADE AWARE OF SUCH POTENTIAL
DAMAGES.

Product FAQs

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18000W Solar Power Inverters

Sol-Ark 18kW Hybrid On/Off-Grid Inverter Battery Charger