Adding a Backup Generator to Off-Grid Solar System
Cleversolarpower Cleversolarpower
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 Published On Feb 7, 2024

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Discover the different ways you can add a generator to your off-grid solar power system. Whether you're looking to enhance your RV's energy resilience or ensure your home's batteries remain charged during low sunlight days, this guide covers everything you need to know. I delve into the best generator options for both RV and house batteries, providing you with the knowledge to choose the right setup for your needs.

Learn how to seamlessly integrate a portable generator for RV batteries, including the use of small, portable inverter generators like the Honda EU2200i and the Pulsar 2. We discuss the advantages of using propane and gasoline, how to connect your generator to battery chargers, and the efficiency of using 50 to 70% of the generator's electrical output to save on fuel and reduce noise. This video makes calculating the charging power for a 12V lithium battery straightforward, ensuring you can get the most out of your generator without compromising on fuel efficiency.

For those with larger energy needs, our guide explores adding a high-capacity, open-frame generator to charge house batteries. Discover the benefits of dual fuel capability, the importance of managing noise and efficiency by operating at 50% to 70% capacity, and the specific requirements for charging different battery voltages. We also introduce the EG4 'chargeverter' for easy manual current adjustment and discuss how to charge large battery banks effectively.

Additionally, we address the technical aspects of connecting your generator to an inverter/charger, including the use of a manual transfer switch and the option for automatic start/stop features with systems like Victron's Multiplus and the BMV-700 battery monitor.

Closing this video, I emphasize the importance of matching your generator's output with your battery's C-rate to avoid overstressing your system. With the rising costs of generator maintenance and fuel, we advocate for expanding your solar array as a more sustainable and cost-effective solution to increase your off-grid power system's reliability.

00:00 Introduction
00:37 Portable Generator
02:30 House Batteries
03:39 Charging Batteries
05:11 Additional considerations

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