Off-Grid Solar Kit 13kW 48V 120V/240V 20.48kWh LiFePO4 14×415W Solar Panels (SGR-13KM)

Off Grid Solar — 13kW Dual Inverter 415W 20.48kWh Complete Kit

Off grid solar at serious residential and commercial scale — the SGR-13KM delivers 13kW of split-phase 120V/240V off-grid power through two coordinated 6.5kW inverters, paired with either 14 or 20 × 415W monocrystalline panels, 20.48–25.6kWh of LiFePO4 battery storage and complete mounting hardware in a kit sized for large homes, farms, light commercial operations and off-grid properties where 10kW falls short. The dual-inverter architecture provides built-in redundancy alongside the expanded output — and both inverter units support up to 6-unit parallel operation, making the SGR-13KM a scalable foundation for systems that may ultimately need to grow well beyond their initial 13kW rating.

Table of Contents

1. Kit Contents by Configuration
2. System Specifications
3. Dual 6.5kW Inverter Architecture
4. 14×415W vs 20×415W Solar Array
5. 20.48kWh Battery Storage
6. What This System Powers
7. Expansion to 78kW
8. FAQ

Kit Contents by Configuration

SGR-13KM (14 panels, 20.48kWh):

• 2 × 6,500W 48V DC 120V/240V AC Output Inverter
• 14 × 415W Monocrystalline Solar Panels
• 4 × 100AH 51.2V LiFePO4 Battery
• 1 × Enclosed Battery Cabinet (for 4 × 100AH)
• 2 Sets × 50ft Solar Extension Cables (Inverter PV Input)
• 14 × Sets Mounting Z-Brackets
• 2 × 200A DC Breaker
• 2 × 25A PV Breaker

SGR-13K25S (20 panels, 25.6kWh):

• 2 × 6,500W 48V DC 120V/240V AC Output Inverter
• 20 × 415W Monocrystalline Solar Panels
• 5 × 100AH 51.2V LiFePO4 Battery
• 1 × Enclosed Battery Cabinet (for 5 × 100AH)
• 2 Sets × 50ft Solar Extension Cables (Inverter PV Input)
• 20 × Sets Mounting Z-Brackets
• 2 × 200A DC Breaker
• 2 × 25A PV Breaker

System Specifications

Dual 6.5kW Inverter Architecture

The SGR-13KM uses two 6.5kW inverters in coordinated split-phase operation rather than a single 13kW unit. This dual-inverter architecture provides three meaningful advantages for off grid solar installations at this output level.

First, built-in redundancy. If one inverter requires service, the system continues operating on the remaining 6.5kW unit — maintaining more than enough capacity for essential loads while repairs are arranged. For large homes, farms and commercial operations where complete system outages are unacceptable, dual-inverter redundancy is a critical operational feature.

Second, flexible phase configuration. Each 6.5kW inverter can operate independently in single-phase 120V mode or in coordinated split-phase 240V mode. This provides operational flexibility unavailable in single-unit systems.

Third, superior expandability. Each of the two 6.5kW inverters supports up to 6-unit parallel operation — enabling the combined system to scale from 13kW toward 78kW maximum output as loads grow.

14×415W vs 20×415W Solar Array

The choice between SGR-13KM (14 panels, 5,810W) and SGR-13K25S (20 panels, 8,300W) is a generation capacity decision:

SGR-13KM (14 panels): 5,810W generation capacity, approximately 23kWh daily under four hours of peak sun. Appropriate for large homes consuming 20–25kWh per day — covering daily consumption with modest surplus for storage.

SGR-13K25S (20 panels): 8,300W generation capacity, approximately 33kWh daily under four hours of peak sun. Appropriate for properties with higher daily consumption, farms with pump and irrigation loads, or systems that intentionally oversupport to maximise cloudy-day resilience and future load expansion capacity.

For off grid solar buyers who are certain of their current consumption profile and want minimum panel count, the 14-panel configuration is the right choice. For buyers who expect consumption to grow or want maximum resilience from their off grid solar system, the 20-panel configuration provides substantial generation headroom.

20.48kWh Battery Storage

Four 100AH 51.2V LiFePO4 batteries in an enclosed cabinet provide 20.48kWh of organised, protected storage. The enclosed cabinet is a specification that matters at this scale — keeping batteries in a structured, ventilated enclosure simplifies installation, improves safety and provides a professional presentation appropriate for both residential and commercial off-grid installations.

What This System Powers

At 13kW continuous output with 20–25kWh of daily solar generation, the SGR-13KM handles the complete electrical load of a large residential property simultaneously:

• Central air conditioning (multiple units)
• Well pump and pressure system
• Electric water heater
• Washer and dryer
• Full kitchen appliances
• Workshop tools
• Lighting throughout a large property
• Entertainment and office systems

This is genuine whole-home off grid solar — the complete electrical replacement for utility power in a large residential or light commercial application.

Expansion to 78kW

Each 6.5kW inverter supports up to 6-unit parallel operation. The two-inverter SGR-13KM can be expanded by adding inverters to each existing unit — scaling from 13kW toward a combined 78kW maximum output in single-phase, split-phase or three-phase configurations. Add battery banks for storage expansion. Add panels for generation increase. The SGR-13KM grows with its installation.

Explore the complete Sungold off-grid kit range in our Solar Kits, Off-Grid Solar Systems and Solar Panels categories.

FAQ

What is off grid solar and what does the SGR-13KM deliver? Off grid solar refers to solar power systems that generate, store and consume electricity independently of the utility grid. The SGR-13KM delivers 13kW of off grid solar output through two 6.5kW split-phase inverters, paired with 14 or 20 × 415W solar panels, 20.48–25.6kWh of LiFePO4 battery storage and all mounting hardware. It is a complete, scalable off-grid solar solution for large homes, farms and light commercial operations.

Why does the SGR-13KM use two inverters instead of one? Two 6.5kW inverters provide built-in redundancy — if one requires service, the system continues on the remaining unit. The dual architecture also provides operational flexibility between single-phase and split-phase configurations and a superior expansion platform — each inverter supports up to 6-unit parallel operation, enabling combined system growth toward 78kW. Single-unit 13kW systems offer none of these advantages.

What is the difference between SGR-13KM and SGR-13K25S? The SGR-13KM includes 14 × 415W panels (5,810W, ~23kWh daily) and 4 × 100AH batteries (20.48kWh). The SGR-13K25S includes 20 × 415W panels (8,300W, ~33kWh daily) and 5 × 100AH batteries (25.6kWh). Both use identical dual 6.5kW inverters. The choice depends on daily consumption profile and desired generation margin — the 20-panel configuration provides 43% more daily generation for larger consumption profiles and higher resilience.

Can this off grid solar system power a whole farm? Yes — at 13kW continuous output with up to 33kWh of daily generation (SGR-13K25S configuration), the SGR-13KM is appropriately scaled for farm applications including well pumps, irrigation controls, refrigeration, lighting and shop equipment. The 78kW maximum expansion capability accommodates significant load growth through parallel inverter addition.

How scalable is this off grid solar system toward commercial scale? Each of the two 6.5kW inverters supports up to 6-unit parallel operation — enabling the system to scale from 13kW toward 78kW through inverter additions. Additional battery banks can be added for storage expansion. Additional solar panels increase daily generation. The SGR-13KM is designed as a scalable platform investment — not a fixed-capacity system — making it appropriate for both current and future energy requirements.