Sol-Ark Pytes Pro 18K Solar Kit
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Visit CalculatorThe Sol-Ark Pytes Pro 18K Solar Kit combines cutting-edge hybrid inverter technology, long-life lithium battery storage, and high-output solar panels into one professional-grade power system. Designed for homeowners, businesses, and installers who demand reliability, it’s capable of operating completely off-grid or seamlessly switching between grid-tied and hybrid modes.
At the center of this kit is the Sol-Ark 18K-2P Hybrid Inverter, delivering up to 18kW of continuous power with 97.6% efficiency. It supports both 120/240V split-phase and 3-phase configurations, making it ideal for residential and commercial applications alike.
Paired with scalable Pytes V5 LiFePO₄ batteries and SunGold 500W or 550W Mono PERC panels, this system is engineered for high-capacity energy storage, real-time smart monitoring, and long-term durability. Whether you’re powering a full home, off-grid property, or mission-critical operation, this kit ensures stable energy performance and complete energy independence.

High-Power Hybrid Inverter - The Sol-Ark 18K-2P inverter delivers 18,000W continuous power and 36,000W surge output, allowing the system to start and run demanding loads such as HVAC units, pumps, and heavy appliances during outages.
Scalable Lithium Battery Storage - The kit includes Pytes V5 LiFePO4 batteries (5.12kWh each), providing expandable energy storage with long cycle life and stable performance for residential or off-grid systems.
Flexible Solar Capacity - The Sol-Ark 18K supports over 40kW of solar input when AC-coupled, enabling large solar arrays and maximizing energy harvesting potential.
Advanced Battery Management - Integrated CANBus and RS485 communication ensures seamless compatibility between the inverter and lithium battery systems for safe and efficient energy management.
Expandable System Architecture - The inverter supports stacking up to 12 units, allowing the system to scale for larger homes or light commercial installations as energy needs grow.


Everything you need to build your solar energy system. Quantities vary based on the configuration selected.
| Specification | Details |
| Continuous Power | 18,000 W |
| Surge Power (10s) | 36,000 W |
| Max. Supported PV Power | 32,400 W |
| Rated MPPT Operating Voltage Range | 150 – 425 V |
| Nominal DC Voltage | 48 V |
| Continuous Battery Charge / Discharge Current | 350 A |
| Max Efficiency | 97.6 % |
| Grid Voltage / Frequency | 120/240 V (split-phase) • 208 V (optional) |
| Stackable | Yes; Max 12 |
| BMS Communication | CANBus & RS485 MODBUS |
| Enclosure | IP65 / NEMA 3R |
| Ambient Temperature | −40 °C to +60 °C |
| Weight | 137 lb (62.4 kg) |
| Certifications and Listings | 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 |
| Standard Warranty | 10 Years |
| Specification | Details |
| Nominal Energy | 5.12 kWh |
| Nominal Voltage | 51.2 V |
| Nominal Capacity | 100 Ah |
| Voltage Range | 47.5 V – 57.6 V |
| Max Charge/Discharge Current | 100A (5.12kW DC) |
| Peak Discharge Current | 101A–120A (3min) | 121A–180A (15sec) |
| Round-Trip Efficiency | > 95 % |
| Cycle Life | ≥ 6,000 cycles |
| Operating Temperature | Charge: 32°F–113°F / 0°C–45°C | Discharge: -4°F–122°F / -10°C–50°C |
| Communication Protocol | CAN / RS485 |
| Dimensions (HxWxD) | 17.4 × 20.87 × 5.51 in (424 × 530 × 140 mm) |
| Weight | 97 lb (44 kg) |
| Chemistry | Lithium Iron Phosphate (LFP) |
| Scalability | 16 pcs (81.92 kWh) in a group | 6 groups (491.52 kWh) in a system w/ a Hub |
| Warranty | 10 years |
| Specification | Details |
| Peak Power (Pmax) | 560W |
| Production Tolerance | ±3% |
| Maximum Power Current (Imp) | 13.3A |
| Maximum Power Voltage (Vmp) | 42.1V |
| Short Circuit Current (Isc) | 14.09A |
| Open Circuit Voltage (Voc) | 50.09V |
| Maximum System Voltage | 1500V |
| Wind Resistance | 2400Pa |
| Output Cables | 12 AWG (1 ft per cable) |
| Number of Cells | 144(6x 24),60 cells in series |
| Cell Type | PERC Monocrystalline (7.2x 3.6 in) |
| Certifications | CE TUV |
| Product Weight | 67.9lbs |
| Product Dimension | 89.8*44.7*1.4inch |
| Package Weight (32 pcs) | 2440.0lbs(32PCS) |
| Package Dimension (32 pcs) | 92.9*48.0*61.8inch(32PCS) |
| Performance | 5 year 95% output warranty 10 year 90% output warranty 25 year80% output warranty |
| Material and workmanship warranty | 12 year material and workmanship warranty |
| Specification | Details |
| Peak Power (Pmax) | 500W |
| Production Tolerance | ±3% |
| Maximum Power Current (Imp) | 13.30A |
| Maximum Power Voltage (Vmp) | 37.60V |
| Short Circuit Current (Isc) | 14.09A |
| Open Circuit Voltage (Voc) | 44.36V |
| Maximum System Voltage | 1500V |
| Wind Resistance | 2400Pa |
| Output Cables | 12 AWG (1 ft per cable)e) |
| Number of Cells | 132(6*22) |
| Cell Type | PERC Mono 182×91 mm |
| Certifications | UL 61730, CE, TUV |
| Product Weight | 56.2lbs |
| Product Dimension | 82.44*44.65*1.38inch |
| Package Weight (32 pcs) | 2006.2lbs(32PCS) |
| Package Dimension (32 pcs) | 85.0*48.0*52.0inch(32PCS) |
| Performance | 5 year 95% output warranty 10 year 90% output warranty 25 year80% output warranty |
| Material and workmanship warranty | 25 years Linear Product Workmanship Warranty and 10 years workmanship warranty. |
How much energy storage does this kit provide?
Each Pytes V5 battery provides 5.12kWh of usable energy. Depending on the configuration selected, total storage can range from 20.48kWh (4 batteries) up to 61.44kWh (12 batteries).
Can this system power an entire home?
Yes. The 18kW continuous output and 36kW surge capacity allow the system to power most residential loads, including HVAC systems and large appliances.
Is this system suitable for off-grid use?
Yes. The Sol-Ark 18K inverter is designed for grid-tied, hybrid, or fully off-grid solar installations, making it ideal for energy independence systems.
Are the batteries expandable later?
Yes. Additional Pytes V5 batteries can be added to increase total storage capacity as energy needs grow.
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I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!
Bruce D.
I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.
Jennene A.
I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.
Ray B.
I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!
Roger V.
I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.
Jeff S.
We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!
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Very fast response times. Very professional. I highly recommend!
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