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Salt battery storage systems for larger solar roofs

with 18 kWh, 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)
  • 18 kWh (salidomo® EXT 18) or 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. Our sales partners will be happy to advise you.

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

  • salidomo® EXT 27 = 28.2 kWh
  • salidomo® EXT 36 = 37.6 kWh

Up to 80 % usable in normal operation, up to 100 % in emergency power operation.


 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)
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)
Expected life at 80 % DoD15 years / > 8500 shallow cycles
Nominal storage size28.2 kWh37.6 kWh
Usable storageapprox. 24 kWhapprox. 32 kWh
Charging power≤ 120 A (≤ 6 kW)≤ 160 A (≤ 8 kW)
Continuous power discharge≤ 350 A (15 kVA)
Inverter limited
Maximum C rate (charge / discharge)0.25 C / 0.5 C
Nominal battery voltage48 V
Battery efficiency (standard cycle)90 %


 salidomo® EXT 27salidomo® EXT 36
Nominal power (Victron, adapted to salt battery)3 x 5 kVA / 400 V
Overload capacity (max. 5 sec.) of the max. discharge power30 kVA
Galvanic isolation (DC from AC)yes
Inverter safety in PV systemsDIN EN 62109 certified
Energy managementVictron ESS adapted to the salt battery by innovenergy®

Further functions

Self-consumption optimisationintegrated and configurable
Breaking demand peaks (peak shaving)integrated and configurable
Automatic stand-by operationwith unloaded inverters
Visualisation, data analysis, energy statisticsWeb platform plus app for iOS + Android
Battery monitoringRemote monitoring of each individual battery in real time

Definition of emergency power

Emergency power
In the event of a grid failure, the system automatically switches over in less than 20 milliseconds and continues to function autonomously. The photovoltaic power is no longer available. However, the battery system can continue to be used until it is completely discharged. 

Uninterruptible Power Supply (UPS)
UPS means that in the event of a power failure, the power supply continues to be guaranteed without interruption. Depending on the class, the switchover to emergency power takes place in a few milliseconds. Such systems are necessary in sensitive systems such as hospitals or server parks – in less sensitive systems, an interruption of several seconds is often not relevant. The interruption of 20 milliseconds during the switchover to emergency power at innovenergy® does not correspond to a real UPS system.

Off-grid operation
With an off-grid battery storage system, the photovoltaic power is still fully or partially available in the event of a grid failure. The battery can continue to be charged. Surpluses can also be consumed in the off-grid system. This extends the duration of self-sufficiency. Here, too, the system switches automatically in less than 20 milliseconds.

Emergency power supply

The salidomo® EXT is optionally available as an off-grid capable salt battery storage system. In this case, the system automatically switches to island operation in less than 20 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, a DC/DC solar charge controller from Victron would have to be used. 

Mains independenceasymmetrical 3-phase operation
Recharging by PV in off-grid operationDC -> DC: Victron MPPT
Separate emergency circuit≤ 15 kVA freely definable
Emergency power switchoverautomatic (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 (power limits)


100 % of the discarded salt batteries are returned to the raw material cycle. In Switzerland, this recycling is ensured by INOBAT. Different recycling regulations apply in each country and advance disposal fees are charged accordingly. Please ask your sales partners in the respective country.


KFW subsidy in Germany is available with a 10-year current value guarantee.


Provided that the installation and operating conditions are complied with, the salt battery is covered directly by the manufacturer with a time-value 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.

innovenergy® Warranty Conditions


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 solutions 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 find your sales partner near you. He will be happy to advise you!

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