Key Components of a Solar & Battery System

Posted on 08 May 2026

Key Components of a Solar / Solar & Battery System

• Solar Panels (convert sunlight to DC electricity)
• Inverters (convert DC to AC electricity, DC to AC or Both)
• Mounting systems (secure the panels to the roof)
• Energy Meter (measure energy movement)
• Batteries (store DC energy for later use)
  

Solar Panels

Solar panels convert sunlight into DC electricity. While they may look alike, their internal technology and build quality affect power output, durability, and lifespan.

Key Comparisons:

• Panel Wattage
• Efficiency
• Temperature Coefficient
• Annual Degradation Rate
• Hail Testing
• Salt Mist Severity Certification
• Shade Optimisation
• Cell Technology
• Warranties

Panel Wattage

Shows the maximum output under ideal conditions. A 475 W panel can generate up to 475 W in standard test conditions. Real-world conditions vary, and higher wattage panels produce more power per panel. For homes with limited roof space, module efficiency is equally important.

Module Efficiency

Measures how much electricity a panel produces per square metre. Higher efficiency is crucial when roof space is limited. For instance, the AIKO 475 W panel generates more power from the same area than the Jinko 440 W panel, making it a smarter choice for small or complex roofs.

Temperature Coefficient

Panels lose efficiency as they heat up. The temperature coefficient shows how much energy a panel loses for every degree above 25 °C. With Australian roofs often 30 °C hotter than the air, this is an important spec that’s often overlooked.

Annual Degradation Rate

Solar panels gradually produce less energy, measured as the degradation rate. Higher quality panels degrade slower, generating more energy over their lifespan.

Hail Testing

Panels are certified to withstand 25 mm hailstones at 23 m/s, and premium panels often exceed these standards.

Salt Mist Certification

Crucial for coastal or humid areas, ensuring panels resist corrosion. The standard has six levels, with higher levels offering more robust protection.

Shade Optimisation

Shade reduces panel performance. Advanced panels like AIKO’s all-back contact models or REA Powers HJT panels optimise for shade at the cell level, reducing losses and extending lifespan.

Technology

Most panels on the market today use N-type TOPCon because it was the most cost-effective way to upgrade existing PERC supply chains for better efficiency. TOPCon (Tunnel Oxide Passivated Contact) improves on the previous mainstream technology PERC by adding a passivated rear layer, delivering solid efficiency and cost-effectiveness—but it’s nearing its peak potential.

More advanced N-type technology like Aiko’s ABC (All Back Contact) goes further by moving all electrical contacts to the rear, eliminating front-side shading for higher efficiency, better temperature coefficients, and dramatically improved performance in partially shaded conditions—making it superior to TOPCon in both performance and design.

At the premium end, HJT (Heterojunction Technology), used in REA Fusion panels, takes a completely different approach by combining crystalline silicon with amorphous layers. This not only builds on the benefits of back-contact technology but adds exceptional low-light performance, ultra-low degradation, bifacial capability, and the best temperature resilience—outperforming both ABC and TOPCon in real-world conditions.

Warranty

Panels carry two warranties: product warranty (covers faults) and performance warranty (guarantees degradation won’t exceed a set amount, usually over 25–30 years).

Inverters

The inverter converts DC from panels to usable AC for your home. Types include:

• Solar Inverters: DC to AC only.
• Battery Inverters: Manage battery charging/discharging.
• Hybrid Inverters: Combine both functions of the solar and battery inverters.
• Micro Inverters: Each panel has its own inverter.
  
  

Mounting Systems

A quality mounting system is critical for the long-term safety and performance of any solar installation. It ensures panels remain secure under extreme weather conditions, prevents roof damage, and maintains correct alignment for optimal energy generation. Inferior mounting systems can corrode, loosen, or fail over time, leading to costly repairs and safety risks. That’s why we only use Schletter—a German-owned and engineered brand with a 25-year warranty, built from T66 marine-grade aluminium for superior strength and corrosion resistance. Schletter systems deliver unmatched durability and reliability, giving homeowners peace of mind that their investment is built to last.

Batteries

Home batteries store excess solar energy generated during the day for use when your system isn’t producing—such as at night, during cloudy weather, or during peak tariff periods—helping reduce reliance on the grid and lower electricity costs. They can also provide backup power during outages and integrate with smart home systems for automated energy management. However, batteries vary significantly in performance and features.

• Discharge Rate: Determines how much power the battery can supply in an hour.
• Optimisation & Scalability: Advanced batteries allow mixing different size or age modules in the same system, making expansion easier as energy needs grow
  
• Safety Features: Includes thermal management, sensors, fire suppression systems, and AI monitoring.
• Battery Chemistry: Most modern batteries use LFP (Lithium Iron Phosphate) for cost-effectiveness, stability, and safety.

Monitoring Systems / Applications

Solar inverters and battery systems include monitoring software or apps for real-time system tracking. With a standard solar installation, you can view live energy generation—handy for scheduling high-energy appliances. All battery systems require an energy meter which includes advanced monitoring for power management.

Advanced monitoring systems allow homeowners to track solar generation, energy consumption, grid import/export, and battery performance through apps and meters. The quality and accuracy of data can vary between brands, and some platforms offer more advanced features than others. For example, Sigenergy’s app not only provides real-time energy insights but can also integrate smart home automation when paired with optional or third-party hardware, enabling users to optimise energy usage and enhance convenience.

Homes with a smart/energy meter can monitor:

• Live energy production
• Live energy consumption
• Solar export
• Battery charge/discharge
• Historical data

Note: Your solar system’s smart/energy meter is different from the distributor meter installed by your energy company.