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Salt battery storage systems for larger solar roofs

with 27 kWh or 36 kWh

You have a larger roof area available that produces more solar energy than you can consume. The normal feed-in is not profitable enough. You would like to not only store your electricity, but also sell it to your neighbours. Or maybe even your neighbours have a PV system too. So, what if you team up and buy a larger storage unit together? You would have a profitable storage community!

innovenergy offers you ecologically harmless salt-based home storage for your PV system:

  • 15 kVA (3 x 5 kVA) inverter power (400 V)
  • 27 kWh storage capacity (salidomo© EXT 27) – can be expanded to 36 kWh (salidomo© EXT 36) at any time with a simple plug-in unit
  • Maximisation of your own consumption through intelligent control
  • Monitoring of the power situation and energy analysis via smartphone app or internet browser
  • plug & store – turnkey solution with easy installation

The salidomo© EXT is an AC-coupled salt battery storage system that works with all PV inverters. The installed battery inverter capacity is 15 kVA. DC coupling of the photovoltaic system via our MPPTs is also possible. We will be happy to advise you.

The battery storage capacity for the two salidomo© EXT works as follows:

  • salidomo© EXT 27 = 28.2 kWh (daily usable: 24 kWh)
  • salidomo© EXT 36 = 37.6 kWh (daily usable: 32 kWh)


 salidomo© EXT 27salidomo© EXT 36
Installed photovoltaic system18 - 30 kWp27 - 45 kWp

System characteristics

 salidomo© EXT 27salidomo© EXT 36
Type of systemAll-in-one system
AC phases3-phase system (asymmetrical operation possible)
KFW subsidyyes, 10-year current value guarantee
Requirements installation sitedry, indoor and outdoor
Fire and personal protection requirementsusual personal protection, no fire protection measures necessary
Extension of battery capacityat any time, old + new batteries can be combined
AC installation effortapprox. 1/2 day (depending on local conditions)
Dimensions (WxHxD)1430 x 1538 x 680 mm (2 parts)
Total weight415 kg 
1 x 290 kg / 1 x 125 kg
520 kg
1 x 290 kg / 1 x 230 kg

Battery storage

 salidomo© EXT 27salidomo© EXT 36
Battery typeSalt battery (molten salt or ZEBRA cell)
Chemical nameNaNiCl2 (sodium nickel chloride)
Battery manufacturer / ProductFZSoNick / 48TL200
Expected life (years/deep cycles/shallow cycles)15 years / > 4500 / > 8500
Nominal storage size28.2 kWh37.6 kWh
Daily usable storage24 kWh32 kWh
Charging power≤ 120 A (≤ 6 kVA)≤ 160 A (≤ 8 kVA)
Continuous power discharge230 A (15 kVA)
Inverter limited
Maximum C rate (charge / discharge)0.25 C / 0.5 C
Nominal battery voltage48 V
Battery efficiency90 %


 salidomo© EXT 27salidomo© EXT 36
Victron, adapted to salt battery3 x 5 kVA / 400 V
Overload capacity of the max. discharge power30 kVA
Time of maximum overload5 seconds
Galvanic isolation (battery from system)yes
Energy managementVictron ESS
Inverter safety in PV systemsDIN EN 62109 certified

Further functions

Self-consumption optimisationintegrated and configurable
Breaking demand peaks (peak shaving)integrated and configurable
Automatic stand-by operationwith unloaded inverters
Energy managementVictron ESS
Visualisation, data analysis, energy statisticsWeb platform plus app for iOS + Android

Definition of emergency power

Without emergency power
In the event of a grid failure, the entire system stops operating and cannot be used any further. Neither the PV system works nor the battery storage system is available.  

Off-grid operation/UPS
With an island-capable battery storage system, the system continues to function completely without the grid in the event of a grid failure. The battery continues to be charged via the PV system. Subsequent technical requirements can be found under "Emergency power supply". 

UPS means uninterruptible power supply. This means that in the event of a power failure, the system automatically switches to off-grid operation in less than 20 msec and continues to function independently.

Emergency power supply

The salidomo© EXT is optionally available as an island-capable UPS salt battery storage system. In this case, the system automatically switches to island operation in less than 0.2 milliseconds in the event of a mains failure and continues to function autonomously. In order for the battery to continue to use solar power without a grid, either a Fronius inverter (SYMO series) would have to be used as the PV inverter or a DC/DC solar charge controller from Victron or Studer.

ATTENTION: The maximum PV power that may be connected to the emergency power output of the salidomo© EXT 27/36 is 15 kW. If DC/DC solar charge controllers from Victron or Studer are used, this power restriction does not apply. For more information on this topic, please contact Victron.

Mains independenceasymmetrical 3-phase operation
Recharging by PV in off-grid operationǀwith Victron, Solaredge, Fronius and Studer
Separate circuit≤ 15 kVA freely definable
Switchover to off-grid modeautomatic (in less than 20 milliseconds) 

Intelligent control

  • Potential-free contact for switching consumers on and off (charging station, heat pump, etc.)
  • Time control for recharging the battery from the mains (calibration 100 % SOC)
  • Lifetime-optimised operation of the battery (discharge protection during bad weather periods, consideration of the weather, power limits)


There are no early recycling or disposal fees. However, the transport of the battery to be discarded back to the manufacturer in Stabio/CH must be borne by the customer. There, the complete battery is returned to its raw material cycle.


With a maximum of 80 % DOD without further conditions, the battery is covered directly by the manufacturer with a guarantee of 10 years. The battery inverters are covered by a 5-year warranty. Everything else is covered by a standard 2-year warranty. The warranty is an device warranty. Travel costs and working hours will be charged separately in the event of replacement or faults, unless you have subscribed to a service contract for the relevant year.


EMC Directive 2014/30/EU: EN 61000-3-2:2014 | EN 61000-3-11:2017 | EN 61000-3-12:2011 | EN 61000-6-1:2007 | EN 61000-6-2:2019 | EN 61000-6-3:2007/A1:2011/C11:2012 | EN 61000-6-4:2019 | EN 55014-1:2017 | EN 55014-2:2015 | EN_IEC 62040-2:2018
Low Voltage Directive 2014/35/EU: EN-IEC 60335-1:2012/A11:2014/A13:2017 | EN-IEC 60335-2-29:2004/A2:2010/A11:2018 | EN-IEC 62233:2008 | EN-IEC 62368-1:2014/A11:2017 | EN-IEC 62109-1:2010 | EN-IEC 62109-2:2011 | EN-IEC 62040-1:2020 | EN-IEC 50438:2014 | EN 62485-1:2018 | EN 62485-2:2018 | UL 1973 2013 Ed.1 | VDE-AR-N 4105:2018-11 | VDE-0126-1-1:2006/A1:2012 | VDE V 0124-100:2019-04 | G99 1-6:09.03.2020 | G98 1-3:03/2019 | EN 50549-1:2019 | EN-IEC 62116:2014 | EN 61439-1:2012 | EN 61439-2:2012 | EN-IEC 62984-1:2017 | EN-IEC 62984-3-1:2017 | EN-IEC 62984-3-2:2017
RoHS (2011/65/EU and 2015/863/EU): EN 63000:2019

Extension options

If the storage demand increases, a battery can be added at any time (even years later) without any problems. The storage capacity then increases by 9 kWh from 27 kWh to 36 kWh. Up to 4 batteries can be operated with the three Victon AC inverters. salidomo© EXT consist of two enclosures, which makes transport and assembly much easier. 

Advantages of the salt battery

The salt batteries of the innovenergy storage solution are made of harmless materials: 32 % common salt, 22 % nickel, 22 % iron, 20 % ceramic.

The recycling of the salt battery has been standardised for 15 years. The metals are melted down and returned to the metal industry. The battery is manufactured 100% in Switzerland according to Swiss environmental and labour standards.

The salt battery is absolutely safe - the rooms do not need any fire protection or fire warning devices as the battery is neither flammable nor can it explode. It can also be operated in very cold and very warm rooms (-20° to +60° C) without ventilation or air conditioning. The outside temperature does not affect the storage capacity or the service life.

The battery survives a total discharge without damage. The salt battery has a service life of at least 15 years (10-year guarantee) and is maintenance-free.

The salt battery is extremely robust and is used by the thousands in the telecommunications industry. In industry, it is considered a cheap and safe electricity storage technology in the long term. With innovenergy, this technology is now also available for domestic use and for businesses.

You can find more information under Salt Technology.

You want to know what the whole thing costs now? 
To do this, click on the "Start Request" button on the left and download the salidomo© EXT price list immediately.