Maximizing Solar Power in the Evening: A Guide to Whole House Battery Systems

Home energy management · Apr 9, 2024

In the quest for sustainable energy solutions, solar power stands out as a beacon of promise. Harnessing the sun's abundant energy offers a clean and renewable alternative to traditional fossil fuels.

However, one of the challenges with solar energy is its intermittent nature, particularly during the evening, when the sun sets. To address this issue, whole-house battery systems have emerged as a key technology for maximizing solar power utilization around the clock.

FranklinWH energy management and storage

Understanding Whole House Battery Systems

Whole house battery systems, also known as home energy management and storage systems, store excess electricity generated by solar panels during the day for later use, typically during the evening or when sunlight is limited. These systems consist of an intelligent energy management center, rechargeable batteries, inverters, and monitoring software to efficiently manage energy flow.

Benefits of Whole House Battery Systems

Energy Independence: By storing excess solar energy, homeowners reduce their reliance on the grid, providing greater energy independence and resilience, especially during power outages.

Maximized Solar Utilization: Rather than exporting excess solar energy back to the grid at lower rates than you pay to get it back, storing it locally for later use allows homeowners to maximize self-consumption and reduce reliance on grid-supplied electricity during peak hours.

Cost Savings: Whole house battery systems can help lower electricity bills by reducing peak demand charges and providing backup power during expensive grid outages.

Environmental Impact: By optimizing solar power utilization and reducing your reliance on fossil fuels, these systems contribute to a cleaner and more sustainable energy ecosystem, ultimately mitigating climate change.

whole home battery system

Key Considerations When Choosing a Whole House Battery System

Capacity: The capacity of the system determines how much energy it can store. Consider your household’s energy consumption patterns and the size of your solar PV system to determine the appropriate battery storage capacity.

Compatibility: Ensure that the battery system is compatible with your existing solar PV system and inverter. Some systems may require additional hardware or modifications for seamless integration.

Warranty and Lifespan: Evaluate the warranty and expected lifespan of the energy management system. Lithium-ion batteries, for example, are commonly used in home energy storage due to their durability and long lifespan.

Monitoring and Control: Choose a system with robust monitoring and control capabilities that allow you to track energy usage, optimize performance, and adjust settings remotely.

Installation and Maintenance: Consider the installation requirements and ongoing maintenance needs. Professional installation may be necessary, and regular maintenance can ensure optimal performance and longevity.

FranklinWH Energy Management and Storage System

FranklinWH energy management and storage system is a whole-house energy solution that manages home energy for higher efficiency and increases solar ROI.

The FranklinWH system contains two primary units: the aGate, an intelligent energy management controller, and the aPower, a battery storage unit.

The aGate is the center of the FranklinWH system that integrates solar, grid, battery, and generator power sources and manages them to optimize consistent energy supply, lower utility costs, and provide rapid backup in case of grid outages.

The aPower is a 13.6 kWh AC-coupled battery with a built-in inverter to automatically transfer between DC and AC. It uses extremely safe LFP cells and can stack up to fifteen aPower batteries per aGate.

Homeowners can use the FranklinWH App to remotely monitor and control the system. There are backup, load shifting, and self-consumption modes to best suit homeowners’ needs, providing optimized energy and backup power to the home, lowering electricity bills, or living completely off-grid.

home energy management and storage

Why Choose FranklinWH?

The FranklinWH system is compatible with most major solar inverters, and the aPower’s big 13.6 kWh storage capacity provides energy for the time of use (TOU) needs and to power the home during outages. It offers a 12-year warranty, during which, if the battery health level drops below 70% under conditions in compliance with the warranty, FranklinWH will replace the aPower battery, an indication of the high quality of the FranklinWH solution.

Built for easy installation and maintenance, the design of the FranklinWH system is quite simple.

Tips for Maximizing Solar Power in the Evening

Time-Based Energy Management: Program your battery system to prioritize charging from solar and the grid during off-peak hours, when electricity rates are lower, and then discharge during peak evening hours when solar generation is limited, and utility prices are highest.

Load Shifting: Shift energy-intensive tasks, such as running appliances or charging electric vehicles, to daytime hours when solar generation is abundant, or late at night, when utility rates are low.

Energy Efficiency: Implement energy-efficient practices and technologies to reduce overall energy consumption, thereby maximizing the impact of your solar and battery systems.

Grid Interaction: Take advantage of grid interaction features, such as net metering and demand response programs, to further optimize energy usage and potentially earn credits or incentives.

Franklin Home Power


Whole-house battery systems offer a practical solution for maximizing solar power utilization in the evening, enhancing energy independence, reducing costs, and mitigating environmental impact.

By carefully selecting and effectively managing these systems, homeowners can unlock the full potential of solar energy, paving the way for a more sustainable future.

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