Complete Off-Grid Solar Kit 8kW 48V 120V/240V 10.24kWh Lithium 5400W Solar Panels (SGK-8MAX)

DIY Solar Panel Kit — 8kW 48V 120V/240V 5400W Complete Off-Grid System

The DIY solar panel kit that professional installers reach for — the SGK-8MAX delivers a complete 8kW off-grid solar power system with everything needed to get from empty roof to running appliances in a single purchase. Twelve 450W monocrystalline solar panels, 10.24kWh of LiFePO4 battery storage with Bluetooth monitoring, an 8kW 48V split-phase 120V/240V inverter and all mounting hardware and cables are included. This is the most popular mid-range off grid solar kit in the range — balancing system output with installation simplicity in a package that serious DIY installers and professional crews alike can take from delivery to commissioning efficiently.

Table of Contents

1. Kit Contents
2. System Specifications
3. 8kW 48V Split-Phase Inverter
4. 12 × 450W Solar Panels
5. 10.24kWh LiFePO4 Battery
6. DIY Installation Approach
7. System Expandability
8. FAQ

Kit Contents

• 1 × 8,000W 48V DC 120V/240V AC Inverter (Up to 6 units parallel)
• 12 × 450W Monocrystalline Solar Panels
• 4 × 200AH LiFePO4 Battery with Bluetooth
• 12 × Sets Mounting Z-Brackets
• 1 × 200A DC Breaker
• 2 × 25A PV Breakers
• 2 × 50ft Solar Extension Cables (Inverter PV Input)

System Specifications

8kW 48V Split-Phase Inverter

The 8kW split-phase inverter in the SGK-8MAX delivers 120V/240V output — the standard North American residential electrical configuration. Split-phase capability means this off grid solar power system runs 240V loads (air conditioners, well pumps, electric water heaters) and 120V loads simultaneously through the same inverter, without requiring a separate step-up transformer or dual-inverter configuration.

At 8kW continuous output, the inverter handles the simultaneous operation of multiple high-demand appliances — providing the full-capacity home performance that separates genuine off grid solar kits from undersized backup systems.

12 × 450W Solar Panels

At 5,400W of total installed solar capacity, the SGK-8MAX generates approximately 21–32kWh of electricity per day under 4–6 hours of peak sun — more than enough to fully charge the 10.24kWh battery bank and power daytime loads simultaneously. The 450W monocrystalline panels are designed for maximum efficiency per square foot — reducing the roof area required for the 12-panel array compared to lower-efficiency alternatives.

For a solar kits buyer comparing generation capacity across different kit sizes, the 5,400W array in the SGK-8MAX consistently delivers more daily generation than the typical household can consume — keeping batteries at full charge and reducing the risk of overnight depletion in all but the worst weather conditions.

10.24kWh LiFePO4 Battery

The 4 × 200AH LiFePO4 batteries with Bluetooth provide 10.24kWh of storage — accessed in real time through the Bluetooth monitoring interface on any smartphone. This storage capacity provides:

• 8+ hours of moderate load operation from fully charged batteries without any solar input
• Full overnight coverage for average residential loads
• Buffer capacity for consecutive cloudy days when combined with generator backup

LiFePO4 chemistry delivers the cycle life, thermal stability and charge efficiency that make it the preferred chemistry for off grid solar panels system storage at this investment level.

DIY Installation Approach

This diy solar panel kit is designed to simplify the installation process without compromising system quality. The Z-bracket mounting hardware directly attaches panels to standard composition shingle and metal roofing — no separate racking system purchase required. The 50ft solar extension cables provide flexible panel-to-inverter routing for most installation geometries. The complete breaker set covers both DC and PV circuit protection in a single purchase.

The system architecture — panels to MPPT charge controller to battery to inverter — follows a linear, well-documented design that experienced DIY installers can commission confidently. The inverter’s parallel capability (up to 6 units) provides future expandability without requiring a system redesign.

System Expandability

The SGK-8MAX is built for growth. The inverter architecture supports up to 6 units connected in parallel — enabling output expansion from 8kW to 48kW as power needs increase. Additional battery banks can be added to extend storage beyond the initial 10.24kWh. Additional solar panels can be connected to the charge controllers within their 100A input ratings, or additional charge controllers added for larger arrays.

This kit solar off grid approach — starting with a right-sized system and expanding methodically — is the most cost-effective path to long-term energy independence for most residential and cabin off-grid projects.

Explore additional solar kit configurations in our Solar Kits, Off-Grid Solar Systems and Solar Panels categories.

FAQ

Is the SGK-8MAX a true DIY solar panel kit? Yes — the SGK-8MAX is designed for DIY installation. All essential components are included — panels, inverter, batteries, mounting hardware, cables and breakers. The system architecture follows a straightforward linear design that experienced DIY installers can commission without professional assistance. Local electrical codes vary, so verify your jurisdiction’s requirements for self-installed off-grid solar systems before proceeding.

What is the daily energy output of this off grid solar kit? With 5,400W of solar panels and 4–6 hours of peak sun, this off grid solar kit generates approximately 21–32kWh per day — more than the 10.24kWh battery capacity, ensuring daily full battery charging with power available for simultaneous daytime loads.

Can I run an air conditioner on this off grid solar power system? Yes — the 8kW split-phase 120V/240V inverter handles single-unit residential air conditioners alongside other household loads. The key variable is total simultaneous load — the 8kW inverter provides 8,000W of continuous output, which accommodates air conditioning plus other standard household loads within that total.

What batteries come with this solar panel kit with battery and inverter? This kit includes 4 × 200AH LiFePO4 batteries with Bluetooth monitoring — providing 10.24kWh of storage. LiFePO4 chemistry delivers superior cycle life, thermal stability and charge efficiency compared to lead-acid and other lithium alternatives at this price point.

How expandable is this off grid solar system kit? The SGK-8MAX inverter supports up to 6 units in parallel — enabling total output expansion from 8kW to 48kW. Additional batteries can be added to extend storage beyond 10.24kWh. Additional panels can be connected within charge controller capacity ratings or via additional charge controllers. The system is designed for methodical expansion without requiring a complete architecture redesign.