Published July 31, 2026 — PES Supply Brand Guide
Sol-Ark: Hybrid and Off-Grid Inverter Brand Guide
Sol-Ark has carved out a distinctive niche in the North American solar market by focusing exclusively on all-in-one hybrid inverters designed for whole-home backup and off-grid capability. Where most inverter manufacturers prioritize grid-tied systems with battery as an add-on, Sol-Ark designs from the battery outward, treating the grid as an optional input. The result is a product line built for energy independence, generator integration, and the ability to power heavy loads like well pumps and central AC during outages. For PES Supply customers choosing among 50,000+ SKUs from 169 authorized brands, Sol-Ark is the go-to platform for off-grid and heavy-backup residential applications.
Browse our complete selection of Sol-Ark hybrid inverters. Pair them with battery storage and solar panels for a complete off-grid or backup system. Standard delivery is 7-10 business days.
1. Company Overview
Sol-Ark is a US-based company headquartered in Allen, Texas (805 Central Expressway South, Suite 200). Founded with a mission to simplify residential energy independence, Sol-Ark designs and markets all-in-one hybrid inverter systems that combine an inverter, charge controller, transfer switch, and load center in a single pre-wired enclosure. The company focuses on the North American market and has built a loyal installer following through its 7-day-a-week live engineering support and 10-year standard warranty. Sol-Ark's inverters are engineered and tested in the US, with manufacturing partnerships for production.
Sol-Ark's market position is defined by its off-grid-first philosophy. While the inverters are UL 1741 certified for grid interconnection, they are equally capable operating with no grid connection at all. This "grid-optional" approach resonates with homeowners seeking energy independence, installers serving rural areas, and the growing market for whole-home backup systems. Sol-Ark's battery-agnostic design—supporting any 48V lithium or lead-acid battery—gives installers flexibility that locked-in ecosystems cannot match.
2. Current Product Lines
Sol-Ark 8K-2P
The Sol-Ark 8K is the entry-level platform, delivering 8,000W continuous output with split-phase 120/240V configuration. Designed for cabins and small off-grid homes, the 8K includes 2 MPPT inputs, integrated charge controllers, and the same pre-wired all-in-one design as larger models. The 8K-2P EMP Hardened variant adds electromagnetic pulse protection for critical infrastructure applications.
Sol-Ark 12K-2P
The Sol-Ark 12K is the volume seller, delivering 12,000W continuous output with 24,000W surge. Split-phase 120/240V output runs standard household circuits without a subpanel workaround. The 12K features 2 MPPT inputs, max PV input of 16,500W, and supports parallel stacking of up to 8 units for systems requiring 96 kW or more. Inverter efficiency is 96.0%.
Sol-Ark 15K-2P
The Sol-Ark 15K is the flagship single-unit residential inverter, delivering 15,000W continuous output with a 45,000W surge rating—sufficient to start central AC compressors, well pumps, and other heavy motor loads. The 15K features 6 MPPT inputs, 97.5% CEC weighted efficiency, and 0ms transfer time for seamless backup. Max PV input is 19,500W. The Limitless 15K-2P-N variant adds enhanced features including 200A grid passthrough.
Sol-Ark 18K-2P (Limitless)
The newest residential platform, the 18K-2P delivers 18,000W continuous output with 36,000W surge. Features include 3 MPPT inputs, 97.6% max efficiency, max usable PV input of 28,800W, and stackability up to 12 units. The 18K carries UL 1741 3rd Edition SB certification, IEEE 1547-2018, and Hawaiian Electric SRD V2.0 compliance.
Sol-Ark 30K and 60K-3P-480V (Commercial)
For three-phase commercial applications, Sol-Ark offers the 30K (30,000W, 208V or 480V three-phase) and the 60K-3P-480V (60,000W, 480V three-phase). These units extend the all-in-one hybrid architecture to larger off-grid and commercial backup applications.
3. Recent Releases (2025-2026)
In 2025-2026, Sol-Ark launched the Limitless 12K-2P-LL hybrid inverter, a budget-conscious variant of the 12K platform with 12kW grid output and 10kW continuous battery backup output. The Limitless 12K won a Bronze Stevie Award for Energy Technology Excellence in July 2026. Key features include 19.2kW maximum solar PV input, 3 MPPT trackers, 100A grid passthrough, 220A integrated battery charger, and support for both AC and DC coupling. Sol-Ark also expanded the 18K-2P platform with full UL 1741 3rd Edition SB certification and Hawaiian Electric SRD V2.0 compliance, opening the Hawaii market. The MySolArk v2 monitoring app received major updates for improved fleet management and remote diagnostics. Firmware updates across the line enhanced time-of-use optimization, peak shaving, and zero-export mode functionality.
4. Certifications & Listings
- UL 1741 (3rd Edition) SB: The 18K-2P and Limitless series carry UL 1741 3rd Edition SB certification, the current standard aligned with IEEE 1547-2018
- IEEE 1547-2018: Full grid-support compliance including interoperability via IEEE 2030.5 (SEP 2.0)
- Hawaiian Electric SRD V2.0: Listed for HECO interconnection
- UL 1699B: DC PV arc-fault circuit interruption (AFCI) integrated
- UL 1998: Software safety certification
- CSA C22.2 No. 107: Canadian safety certification
- FCC Part 15 Class B: Residential emissions compliance
- Rule 21: Smart inverter functions for California interconnection (where applicable by model)
5. Warranty Terms
Sol-Ark offers a 10-year standard warranty across its inverter line—one of the most generous standard warranties in the hybrid inverter category. The warranty is verified through HALT (Highly Accelerated Life Testing) data. Sol-Ark's warranty covers the inverter unit and includes the company's 7-day-a-week live engineering support, which is a significant differentiator for installers who need troubleshooting assistance during commissioning or service calls. Battery warranty is separate and depends on the battery manufacturer, since Sol-Ark is battery-agnostic.
6. Popular Products at PES Supply
| Model | Type | Power | MPPT | Efficiency | Key Features | Price Range |
|---|---|---|---|---|---|---|
| Sol-Ark 15K-2P | All-in-one hybrid | 15,000W | 6 | 97.5% CEC | 45kW surge, 0ms transfer, whole-home backup | $5,000-$6,000 |
| Sol-Ark 12K-2P | All-in-one hybrid | 12,000W | 2 | 96.0% | 24kW surge, stackable to 8 units, pre-wired | $4,000-$4,800 |
| Sol-Ark 18K-2P | All-in-one hybrid | 18,000W | 3 | 97.6% | 36kW surge, UL 1741 3rd SB, HECO SRD V2.0 | $5,500-$6,500 |
| Sol-Ark 8K-2P | All-in-one hybrid | 8,000W | 2 | 96.0% | Cabin/small home, EMP hardened variant available | $4,500-$5,200 |
| Sol-Ark Limitless 12K-2P-LL | All-in-one hybrid | 12,000W | 3 | 96.5% | 19.2kW PV input, 100A passthrough, Stevie Award | $3,800-$4,500 |
7. Technical Comparison
| Feature | Sol-Ark 15K | Schneider XW Pro | SolarEdge Energy Hub |
|---|---|---|---|
| Continuous output | 15,000W | 6,800-7,600W | Up to 11.4 kW |
| Surge power | 45,000W | Moderate | Limited |
| Topology | All-in-one hybrid | Hybrid/charger | DC-coupled hybrid |
| Battery compatibility | Any 48V (LFP, lead-acid) | CAN bus lithium | SolarEdge Home Battery only |
| Transfer time | 0ms | ~20ms | ~20ms |
| CEC efficiency | 97.5% | ~96% | 99% |
| Standard warranty | 10 years | 10 years | 12 years |
| Cost per watt | $0.35-$0.45 | $0.40-$0.55 | $0.25-$0.35 |
Sol-Ark's competitive advantage is whole-home backup power and off-grid capability at a price point that undercuts purpose-built off-grid inverters while offering grid interconnection that pure off-grid units cannot. The 15K's 45,000W surge and 0ms transfer time make it uniquely suited for homes with heavy motor loads. The trade-off is lower CEC efficiency than SolarEdge and a higher cost per watt than conventional string inverters. The battery-agnostic design is a major advantage for installers who want to source batteries independently.
8. Monitoring & Software
Sol-Ark's monitoring is accessed through the MySolArk v2 app (iOS and Android) and a web portal:
- Real-time monitoring: Solar production, battery state of charge, grid import/export, and load consumption
- Remote control: Adjust work modes (grid-tied, off-grid, time-of-use, peak shaving, zero-export) remotely
- Fleet management: Multi-site dashboards for installers managing multiple Sol-Ark systems
- Generator integration: Monitor and control generator auto-start based on battery state of charge or load conditions
- Firmware updates: Remote firmware updates pushed through the app
- Alert system: Fault notifications and production anomaly alerts via push notification and email
9. Installation Notes
- Pre-wired design: Sol-Ark inverters arrive pre-wired with integrated charge controllers, DC disconnect, AC breakers, and rapid shutdown in a single NEMA 3R enclosure. This eliminates the need for external combiner boxes, transfer switches, and separate charge controllers, simplifying installation and reducing balance-of-system costs.
- Wiring: The all-in-one design means DC PV input, battery, AC grid, AC load, and generator connections are all made at the inverter's terminal block. Follow the labeled terminal layout and torque specifications in the installation manual.
- Grounding: The enclosure is grounded to the main bonding jumper. Battery negative is typically floating (ungrounded). Follow NEC 690.41 and 690.42 for array grounding requirements.
- Rapid shutdown: Sol-Ark inverters include integrated rapid shutdown functionality. The PV DC disconnect switch is integrated, and the system supports module-level shutdown requirements per NEC 690.12 when paired with compatible rapid shutdown devices.
- Grid code setup: Grid-support parameters and work modes are configured through the touchscreen interface or MySolArk app. Select the appropriate grid standard for your utility. Zero-export and time-of-use modes can be programmed for self-consumption optimization.
- Generator integration: The GEN port supports generator pass-through and auto-start. Configure the generator start/stop thresholds based on battery SOC and load requirements. Sol-Ark supports propane, natural gas, and diesel generators.
- Battery communication: Sol-Ark communicates with lithium batteries via CAN bus or RS485 Modbus. Verify the battery is on Sol-Ark's compatibility list, or use voltage-based charging for lead-acid batteries that do not require communication.
10. FAQ
Can Sol-Ark operate completely off-grid?
Yes. Sol-Ark inverters are designed for true off-grid operation with no grid connection required. They function as standalone battery-based inverters, charging from solar and/or generator and powering loads independently of the grid.
What batteries work with Sol-Ark?
Sol-Ark is battery-agnostic and works with any 48V lithium (LiFePO4) or lead-acid battery, including brands like EG4, Fortress, KiloVault, SimpliPhi, and others. Lithium batteries communicate via CAN bus or RS485; lead-acid batteries use voltage-based charging.
Can I stack multiple Sol-Ark units?
Yes. The 12K supports stacking up to 8 units in parallel for up to 96 kW. The 18K supports up to 12 units. Stacking requires communication cables between units and proper AC synchronization.
Does the 15K really start a central AC compressor?
Yes. The 15K's 45,000W surge rating (3x continuous) is specifically designed to handle motor inrush currents from compressors, well pumps, and other heavy loads that trip lower-surge inverters.
How long does delivery take?
All Sol-Ark orders from PES Supply ship within 7-10 business days. We do not offer same-day or free shipping.
Shop Sol-Ark
Explore our full inventory of Sol-Ark hybrid and off-grid inverters. PES Supply carries 50,000+ SKUs from 169 authorized brands—your B2B electrical and solar distribution partner. Shop all Sol-Ark products. Delivery is 7-10 business days on all orders.