Happy Power ESS is a rechargeable home battery and home energy management solution that stores energy from solar or the grid and uses it to help lower energy costs and provide back up power in case of power outages. With a built-in inverter, the Happy Power ESS can be retrofitted into an existing solar system, be part of a brand new solar system, or can be a stand-alone system. The Happy Power ESS’s energy management system helps to reduce energy costs, and allows users to control and monitor the Happy Power ESS from anywhere in the world. When new firmware or software updates get released the Happy Power ESS is automatically updated with the new features and functionality.

Happy Power ESS can be used for a variety of applications, including:Happy Power ESS provides seamless backup power in the event of a utility power outage. In a longer outage, Happy Power ESS can recharge from a solar power system. If necessary, it can even run the home from solar and Happy Power ESS indefinitely.
If the utility offers a time-of-use rate plan, Happy Power ESS can charge when rates are low and use that energy during expensive times to reduce electricity bill charges
Self-Powering your home
With Happy Power ESS you can use more of your solar by storing the excess energy and using it at night, which increases the amount of solar energy that directly powers your home
You can monitor and manage your solar, Happy Power ESS and home energy use in real-time with the Happy Power mobile app.

With the Happy Power ESS mobile app and web-based dashboard, you can customize how much battery is available for backup power and select three different modes, Backup, Time-of-Use, and Self-Supply, which allow you to choose how you use your battery’s energy use. Additional control features will continue to become available with over-the-air updates.

The Happy Power ESS needs an Internet connection to receive software updates and to communicate with the Happy Power mobile app/web app for energy monitoring. A reliable connection is required to provide new product features over time. If its connection is temporarily lost, Happy Power ESS can continue to operate with its most recent settings, but it should not be installed in a location without Internet.

Happy Power ESS is available from 1.2Kwh to 3.77MWh storage capacity configurations. The right size for your home depends on a few variables, including your electricity usage profile, how much solar is being paired with your Happy Power ESS, and what your specific goals are for your home energy storage project. Your certified Happy Power installer will help determine which size is best for you.

Yes, the AC-coupled Happy Power ESS can integrate with any existing solar system. It’s best to check with your certified Happy Power installer to determine compatibility and configuration.

Yes, you can charge your Happy Power ESS from the utility grid and have backup power when the grid is down. Check with your installer to discuss the benefits of pairing solar with your Happy Power ESS. We offer AC & DC coupled solutions and there is a benefit in exploring each when you consider adding storage to your home.

Happy Power is on the cutting edge of home energy storage technology. Happy Power ESS represents the latest in-home battery technology and utilizes the LiFePO4 battery chemistry which is provided by CATL the biggest battery manufacturer in the world. This battery technology is safer, more reliable and longer-lasting when compared to other technologies on the market.

Generally speaking, yes, Happy Power ESS can be configured as a whole-home backup. This system features a greater output capacity that can handle the most common electricity demands from most homes. We recommend that you work with your certified Happy Power installer to determine how you can manage your electricity consumption when the grid is down to prolong the usefulness of your Happy Power ESS.

This is a common question and one without an exact answer. Many EV chargers allow the operator to reduce charging amps to a level that falls within the Happy Power ESS operating guidelines. You’ll want to work with your Yorkwatt certified installer to determine if charging your electric vehicle with Happy Power ESS is a viable option for you.

Happy Power ESS offers many benefits to a homeowner when the grid is up, but when the grid goes down, you’ll be happy that you had a Happy Power ESS installed. There will be a seamless transition to battery power when the grid is down, Happy Power will automatically change to “Back Up” mode. At this time, you’ll want to check your Happy Power application to determine your battery state of charge and how your home is using electricity.

Yes, the Happy Power ESS can be integrated with your existing solar system using our AC-Coupled model. The Happy Power ESS is compatible with most solar inverters.

Yes, the Happy Power ESS can be used without the need for an additional string or micro-inverters with our DC-Coupled model.

Yes, the Happy Power ESS is able to keep a home solar system running during a power outage and to recharge the batteries during extended outages. When more solar is being produced than can be used or stored, Happy Power ESS is able to curtail the solar system and turn it back on when the energy can be used again.

For 7/7.6/8.6/9.6kW, you can connect up to 8 PV cables to PV terminals (4 MPPT trackers).
For 5kW/6kW, you can only connect 4 PV cables to PV terminals (2 MPPT trackers).
For additional system design questions, please contact us at www.Yorkwatt.com/en/service/feedback

If you are in a remote area without access to grid power, the Happy Power ESS and solar can offer an off-grid solution.

Not at this time.

The Happy Power ESS Consists of three critical components: the batteries, the inverter, and the . The provides energy management, metering and monitoring functions for Happy Power ESS. The Happy PowerHub also includes communication functions and receives over-the-air updates for the system.

The Happy Power ESS installation includes at least one Happy Power ESS battery and Inverter, and standard electrical hardware as required by your particular installation and local electrical codes.

When configured in the 15 or 20 kWh configuration, the Happy Power ESS battery enclosures can be mounted as single side-by-side units on a wall, or on the floor. When mounted side-by-side on a wall, Happy Power ESS units must have sufficient clearance on each side for electrical connections and proper ventilation.

The Happy Power ESS is rated for indoor and outdoor installation, and can operate within a wide range of temperatures, from -20°C to 55°C (-4°F to 131°F). At the high and low ends of this temperature range, the Happy Power ESS will limit charge or discharge power based on battery cell temperature to improve battery lifespan. To optimize performance, avoid installing the Happy Power ESS in locations exposed to direct sunlight or subject to sustained high or low temperatures. However, we recommend that the Happy Power ESS be installed in a temperature-controlled climate such as a garage or a basement for optimal performance and lifetime.
While humidity and rain do not pose a risk, the Happy Power ESS should not be installed in locations subject to flooding or near water sources such as downspouts, faucets or sprinkler systems. In order to maintain proper ventilation, the Happy Power ESS should be kept clear of debris such as leaves and dense brush, and of accumulated snow.

The Happy Power ESS does not currently have the ability to work with existing battery systems.

In the event of a utility power outage, the Happy Power ESS immediately disconnects the home’s critical load electrical system from the utility and restores power to the home. Whereas a traditional solar system typically shuts down during a grid outage to prevent any power from going back into the grid, because the Happy Power ESS manages the grid connection, solar can continue to operate. The Happy Power ESS is able to coordinate its charge and discharge based on home usage and solar production while curtailing solar production when necessary.

In Self-Supply mode, the Happy Power ESS charges from the excess solar energy generated during the day, and discharges to power your home at night.
When solar is producing more power than the home is using, the Happy Power ESS captures and stores that energy. When the home is consuming more energy than solar is providing, the Happy Power ESS discharges enough energy to offset the home usage. If solar is producing more than the Happy Power ESS can store, or the home needs more than the Happy Power ESS can provide, the remainder can be exported or imported from the grid respectively.

The Happy Power ESS is able to store solar energy when rates are lower, and discharge that energy to offset the home’s usage when rates are higher. The Happy Power ESS prioritizes charging from solar energy instead of the grid in order to meet the requirements outlined by government. Using the Happy Power mobile or web-based app, homeowners are able to customize a charge/discharge schedule based on the utility’s Time-of-Use rate plan.

As long as the Happy Power ESS is connected to the Internet, homeowners can use the Happy Power mobile app to monitor home energy system in real time and view energy usage history. During a grid outage, Internet is often still available with the Happy Power ESS and homeowners are able to view the Happy Power ESS’s status. If the Internet connection is lost, the Happy Power ESS will continue to operate with its most recent settings, but will not be able to monitor operation or change settings until connectivity is restored.

Yes, the Happy Power ESS can charge from the grid. However, if the Happy Power ESS is charged from the grid instead of solar, it will negate the ability to receive the Federal Investment Tax Credit, which is a 30% credit. When Happy Power ESS’s state of charge is below its backup reserve or when it is in Backup-only mode, it can charge from the grid.

Yes, the Happy Power ESS can provide stored solar energy to an EV through your home electrical panel. However, there is no direct connection between the Happy Power ESS and the EV wall connector. It is not recommended that an EV charger be connected to the critical load panel, either.

An average home uses approximately 20 kWh of energy per day. A small home may use as little as 10 kWh and a large home may use 40 kWh or more per day. The Happy Power ESS, at its base level, provides 10 kWh of energy for backup power and can be scaled to 20 kWh. You can use the Happy Power mobile app to monitor usage and conserve power to extend backup coverage for a day or more. Additionally, when the Happy Power ESS is paired with solar it can continue to recharge and has the potential to run your home indefinitely.

The Happy Power ESS can detect an outage, disconnect from the grid and bring power back to your home in a fraction of a second. Lights may flicker, but digital clocks should not reset. Unlike backup generators, the Happy Power ESS can keep your appliances running without interruption.

The best way to extend your usage of the Happy Power ESS during an outage is to limit the energy consumption of your home. You can do this by monitoring your use of non-essential or energy-hungry appliances like air conditioners, plasma TVs, hairdryers, and hot tubs.

If you exceed the Happy Power ESS’s power (5 kW each) or energy (10 kWh each) capabilities, it will safely shut down similar to your home circuit breaker. We’ve taken precautions to make sure this does not happen by working closely with our installer network to ensure that the Happy Power ESS is not overloaded when installing the system. If energy is depleted, and the grid has not yet returned, the Happy Power ESS will automatically restart when the sun begins to rise the next day.

The Happy Power app is available on the iTunes and Google Play stores. You can download the Happy Power mobile app from your regular app store on your device. Please visit our YouTube channel for additional support videos and be sure to subscribe to stay up-to-date with our latest releases.
During the commissioning process, you will receive a welcome email that will prompt you to create an account from which you can log in.

Power Flow shows real-time power generated from your solar system, stored/discharged by the Happy Power ESS, used by your home, and exported/imported from the grid. It can be accessed from the Happy Power ESS’s home screen. You will have real-time visibility into your home energy system.

From the Real-time Power Flow display, select the timeline, to access the graph page, which shows historical power and energy usage. From there you can select the desired time period and access more data.

Select the ‘System’ tab on the top of the screen. Homeowners can select between three different modes: Backup, Self-Supply, and Time-of-Use, which allows you to select the mode that best fits any energy lifestyle. The Happy Power ESS’s software will optimize for cost savings with the available energy available in the ‘Self-Supply’ mode.

When installed with PV, the Happy Power ESS is designed to charge from solar energy. If the solar system is not yet operational, the Happy Power ESS will not be able to charge. If the solar system is operational and the system is in ‘Self-Supply’ Mode, the Happy Power ESS will charge with any excess solar that your home doesn’t immediately use. Smaller solar systems sometimes do not produce more than what the home is currently using.

Power flow shows the instantaneous flow of power of the home’s energy system. On a typical day a combination of solar, grid, and the Happy Power ESS may be powering the home’s loads. Solar energy may flow to the grid when the home loads do not need it and the Happy Power ESS is full. When charging the Happy Power ESS to its backup reserve level or in ‘Backup’ Mode, solar power will flow directly from solar to the Happy Power ESS while grid energy is drawn for the home.

Happy Power ESS comes with a 10-year warranty. The warranty details can be found here.

The specifications for Happy Power ESS can be here.

The Happy Power ESS Installation Manual can be found here.