Frequently Asked Questions

About the Junelight Smart Battery

The following overview contains a list of frequently asked questions and answers to them. If your question is not shown here or if the answer does not meet your needs, you can also contact us directly.

The Junelight Smart Battery must be installed and set up only by Siemens-certified installers. We have a network of qualified installers available for the purpose, all of whom have undergone intensive training on the Junelight Smart Battery and meet our quality requirements. Under “Request Offer,” you can request an offer from one or more partner entities in your area.

 

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Yes. Because this is an AC-coupled system, the Smart Battery is easy to incorporate into the house network, regardless of the PV system used.

The Junelight Smart Battery is an integrated system that already includes the battery inverter. Because the Junelight Smart Battery is an AC-coupled system, your PV system still runs using your own inverter. 

Two Siemens PAC 1600-series meters are installed in your distribution box, which record both PV feed-in and current flows at the grid feed-in point. Your consumption is calculated from the difference, to enable the Smart Battery to best reconcile all charging and discharging processes against each other.

Safety is our top priority. A type B residual current device not only protects your system in the area where AC current is present, but also protects the entire part of your system that uses DC. That means our protective relaying will also identify faults in the DC system, thus providing you with comprehensive protection. 

 

This is not the case for other manufacturers that do not use type B, which can lead to dangerous fires and potentially life-threatening electric shocks. We recommend you also protect your PV system with a type B RCD, since direct currents are also found there.

The dimensions and the software of the Junelight Smart Battery are designed specifically for the battery modules that will be used, so they cannot be replaced with modules from other manufacturers. Only the batteries provided by Siemens can be used.

The system is currently designed to be combined with a photovoltaic system. In the future, however, it will be possible to use alternative generators like small wind turbines or cogeneration systems.

It is technically possible to connect several generating systems like photovoltaics, a mini-cogeneration unit or small wind turbine in parallel. This would make the metering process much more complicated, however, so we do not currently offer this option.

The Smart Battery was designed to ensure the hardware includes all the relevant connections for future functions, so the system can be refined step-by-step via free software updates.

 

That means provisions have been made to connect heat pumps and a wall box for an electric vehicle, which will expand your options for smart power management in real time. Forward compatibility is a particular advantage of this system.

For capacities of up to 6.6 kWh, the housing and battery are supplied together in a single package on one pallet. For 9.9 kWh or higher, the product is delivered on two pallets.

The housing components can only be stacked, not assembled side-by-side. You can mount the expansion housing on the floor or attach it to the wall.

Following a power failure, the storage unit automatically synchronizes itself again. Full functionality is restored within a short period, regardless of the cause of the outage.

You can use the storage unit without an Internet connection. But to optimize consumption of your own-generated energy, we recommend you have an uninterrupted Internet connection.

 

It is also a condition for warranty claims that data can be shared and updates installed via an active Internet connection from time to time (at least every two months).

You can obtain all information about current battery status via your Smart App.

The Junelight Smart Battery is maintenance-free.

We guarantee at least 80 percent of the rated capacity of the batteries for the first ten years, and five years for the other system components. The system warranty can also be extended to ten years at an extra cost.

 

Our detailed warranty conditions are available at siemens.de/junelight/garantie.    

You can arrange a warranty extension from five to ten years with any of our partner installers up to six months following installation.

Because of the time needed to perform testing, we cannot offer a valid assessment of cycle details. In addition, the service life of a battery is determined mainly by its age and operating conditions. 

 

Siemens Junelight is guaranteed to maintain 80 percent of its rated capacity for the first ten years. The Junelight system also makes use of weather and consumption forecasts to charge the batteries as gently and as predictively as possible.

The Smart Battery is an extremely intelligent storage system that takes both weather and output forecasts and your individual consumption forecasts into account in order to maximize consumption of your own generated solar power.

The lithium-ion batteries (graphite/NMC) that are used are highly efficient and offer the greatest energy density on the market in comparison to alternative cell technologies.

Here at Siemens, we have had the entire system and our entire manufacturing system certified by the German Association of Electrotechnical Engineers (VDE). VDE is one of the country’s largest independent testing institutions and is responsible for electrotechnical standardization in Germany. In this way we can be sure that the way the individual components work together meets maximum safety requirements, and that every finished system is of matching quality and tested under equal conditions. 

 

We also ensure testing is performed in accordance with the most stringent standard, e.g. the German Industry Standard in the case of material strength. In addition, VDE tests each software update for safety-relevant factors. We can therefore state that when you deal with us, you can be sure of no excessive electromagnetic interference and maximum personal safety, even in the event of a fault.

 

The Smart Battery incorporates a three-stage safety plan that exceeds the requirements of the VDE standard: As a result, both the battery management system and the inverter and control unit can independently power the batteries down in the event of a fault, in order to prevent potential hazards.

With an AC system like the Siemens Junelight Smart Battery, the battery inverter is connected to the house network, which converts the alternating current (AC) into direct current (DC). 

 

AC systems are ideal if you already have a solar plant with a PV inverter and simply want to add an electricity storage system. But even with new installations you can enjoy total flexibility with an AC system, regardless of whether your generation system is PV, wind power or a cogeneration unit. The size of the plant makes no difference.

With an AC system like the Siemens Junelight Smart Battery, the battery inverter is connected to the house network, which converts the alternating current (AC) into direct current (DC). 

 

AC systems are ideal if you already have a solar plant with a PV inverter and simply want to add an electricity storage system. But even with new installations you can enjoy total flexibility with an AC system, regardless of whether your generation system is PV, wind power or a cogeneration unit. The size of the plant makes no difference.

We work with a service partner, Suncycle, which is responsible for dealing with servicing questions quickly and smoothly. 

 

Suncycle is the contact for you as the installer, and also for any questions that the end customers may have. That ensures a professional service while taking the load off you. Just give your installer customer number and get direct support from one of our technicians. That means no lengthy waiting times during the set-up process.

Siemens offers an appealing partner program to ensure the batteries operate smoothly for the end customer. It’s vitally important for customers to know whether they are dealing with a tested and trained Junelight partner. That’s why we’re happy for businesses to publicize the fact they work with Siemens on their websites, etc. 

 

Promotional materials provided by Siemens can be used both online and offline. The only exception is the Siemens logo, which cannot be licensed and must not be used by partner entities themselves.

To protect the batteries and enable a lengthy service life, the storage blocks are all charged and discharged together, not one after the other. That means that when a new battery is retrofitted, it must first be charged to the same level as the other batteries to enable them to be run in parallel.