TESVOLT stands for innovation and the highest quality standards. The A-series products are being discontinued because we are constantly striving to offer you the most modern and efficient solutions. Thanks to technological advances and sustainable developments, we will soon be able to present you with a new generation of storage systems that are even more efficient, durable and powerful.
Our aim is to remain at the cutting edge of innovation and to offer you products that ensure the long-term value and trust you place in TESVOLT. With this further development, we are setting standards for the future of energy storage - and remain your reliable partner for advanced solutions.
We will be happy to provide quotes for A-Series products until 30 April 2025.
Orders can be placed until 30 June 2025. However, as stock is limited, certain configurations or systems may no longer be available before 30 June 2025.
In the future, we will increasingly focus on our new solutions, which offer you real added value through higher performance and state-of-the-art technologies.
The order deadline for A-series systems is 30 June 2025. If your customer has decided later, please contact your responsible area manager or our Customer Service at customer.service@tesvolt.com to clarify the issue on a case-by-case basis and find a possible solution.
We guarantee continued support for the products: Our support for the TS 48 V, TS HV 70 and TS-I HV 80 products will be available to you beyond the end of sale for the entire duration of the warranty (5-year system warranty and 10-year capacity warranty). With our support, we ensure that you have a smooth transition phase if you want to switch to our new, high-performance products.
Yes, our service for the A-series will continue even after the order stop. Repairs are carried out under the terms of the warranty so that you can continue to utilise the full potential of your investment and long-term safety is guaranteed.
It will be possible to order additional battery modules for expanding the storage systems until 30 June 2025. After the deadline, systems in the field can no longer be retrofitted or expanded.
Information regarding the expansion of A-series storage systems:
2025-02_Expansion_TESVOLT_A-Series_ENG.pdf (356.9KB)
Our E-Series represents the next generation of energy storage, offering flexible, future-proof solutions – whether for small businesses, industry, or large-scale operations. With the ability to leverage dynamic electricity tariffs, the E-Series creates new savings opportunities and maximizes flexibility in energy management. Store energy when prices are low and use it when prices rise.
In addition, the E-Series meets a variety of requirements:
Explore the full range of the E-Series and discover the innovative possibilities for future-proof energy storage from TESVOLT.
We will also be introducing some new products shortly - so stay tuned!
Yes, you can purchase spare parts for your customers until 30 June 2025.
Please speak to your Area Manager or our Customer Service team at customer.service@tesvolt.com.
With our newsletter, you’ll always stay up to date on key dates, product news, and changes. This ensures you’re always informed and won’t miss any updates. For individual questions or specific concerns, our customer service team is always available – we’re happy to assist!
APU connector set (HV or LV): consisting of rail connector (LV) or DC connection cable (HV), as well as communication cables to connect the APU with the battery modules
Module connector set (HV or LV): consisting of rail connector (LV) or DC connection cable (HV), as well as communication cables to connect the battery modules to each other. You will generally need one module connector set fewer (or two fewer, for double cabinets) than you have battery modules.
Cabinet connector set (HV or LV): is required to connect the battery modules to the adjacent TS cabinet. The content is equivalent to that of the module connector set, but with the cable lengths adjusted accordingly. The HV system generally consists of one double cabinet. With the LV system (TS48V), the cabinet connector is only required if more than 10 battery modules are to be installed, or if smaller cabinets are to be used for reasons of space.
DC connector set APU to Bat INV/BatBreaker (HV only): Connection cables to connect the APU (HV) with the inverter. Incl. communication cable and PE cable. The standard length of the cables is 5 m with a cross section of 35 mm². Other lengths are available on request.
DC connector set BatBreaker to Bat INV (HV only): Optional, only if you are using a BatBreaker. Set consisting of two cables with a length of 1 m each.
DC connecting cable set (LV only): Connection cables to connect the APU (LV) with the inverter (Sunny Island) or BatFuse. Incl. communication cable and PE cable. The standard length of the cables is 5 m with a cross section of 120 mm². Other lengths are available on request.
DC connector set BatFuse to Sunny Islands: can be ordered as an option. The set contains 10 m cable & lugs for connecting the Sunny Island inverter to the BatFuse (enough for 6 cables with a length of 1.6 m each with a cross section of 50 mm²).
Note that all cables between the APU and the inverter are not pre-assembled in advance, but must be pre-assembled by the installer on site in accordance with the local conditions (the accessories required for this, such as cable lugs and end ferrules, are included in the set). Check the permitted cable lengths as per the operating manual of the inverter.
The battery management system generally prevents the storage system from deep-cycling. If the storage system is empty, trickle charging starts up, i.e. in case of doubt, the storage system is kept running using energy from the utility grid. If such trickle charging is not possible, for example in off-grid applications, or as a result of malfunction, the entire system switches itself off before damage can occur to the battery modules.
In this case, please contact our service team. We will check whether the modules are sound and can subsequently restore them to an operational condition.
Make sure the installed version of the LCS tool corresponds to the firmware of the Inverter Manager. To do this, check the “Communication Version” on the display of the STPS-60. The version of the LCS tool must be the same or higher than that of the Inverter Manager.
Check your network configuration. An IP address of a router provided by the customer (DHCP server) must be assigned on the LAN1 page of the Inverter Manager. Only the storage system components may be connected on the LAN2 page (no additional router or other external IT components). LAN1 and LAN2 must not be connected with each other. Check whether your PC has received a valid IP address in the same subnet as the Inverter Manager.
Check the settings on the web interface of the Sunny Island under BatteryàUsage ranges. If seasonal operation is enabled there, the Sunny Island assumes there will be reduced PV charging power in winter. This results in the Sunny Island limiting the usage range of the battery in winter.
In general, you can only connect new battery modules to an existing system if the module voltages are identical (+/- 0.1 V). New modules leave our factory with a voltage of 50 V. This equates to a state of charge of approximately 20%. In preparation for installation, you should therefore bring the storage system to 20% SoC.
If you are expanding with a complete string (master/slave operation), the APU detects differences in the system voltages independently. When the system is restarted, initially only the system with the lower state of charge switches on. All other systems switch on as soon as the appropriate voltage is achieved through charging.
Follow the instructions of the current installation manual.
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