Updated 2026-02-17
Yes, but a special backup unit is required. The EnergyHub is powered by alternating current and will shut down when the power goes out. By supplementing the system with a backup, the battery and solar panels can be kept running during a power outage.
Ferroamp currently offers Ferroamp Emergency Power 1P, which is a single–phase inverter of 2 kW, and Ferroamp Emergency Power 3P, which is a three–phase inverter of 11 kW.
Emergency Power units includes an automatic backup power switch that switches between mains and backup power operation.
With Ferroamp Emergency Power 1P, the power of a battery can be used for the most important loads of the property for a long time.
To Ferroamp Emergency Power 3P, all or selected parts of the house can be connected and there is a generator input that can be used to charge the batteries in the system during longer power outages if solar power is lacking.
The solution can be used for Ferroamp systems with only one EnergyHub unit (EnergyHub Wall 14/21/28) and at least one battery with ESO unit and DC-fed BMS. The solution has not been tested for systems with multiple EnergyHub units or in PowerShare networks.
Ferroamp Emergency Power 1P
Ferroamp Emergency Power 1P can drive all single-phase loads up to a rated power of 2 kW. However, some loads with high starting currents can cause the overcurrent protection to trip and the system will need to be manually restarted. Ferroamp Emergency Power 1P does not support three-phase loads.
Ferroamp Emergency Power 3P
Ferroamp Emergency Power 3P can drive three-phase loads up to 11 kW. The maximum total load per phase must not exceed 3.6 kW. Some loads with high starting currents can cause the overcurrent protection to trip and the system will need to be manually restarted. Note that Emergency Power 3P cannot output more power than is available on the DC grid in total. For best function, we recommend that the ESS Power Case is equipped with two ESO units and a full battery stack.
Ferroamp Emergency Power has a compact earth reference rod that is an innovative feature for backup power operation that can be installed at a significantly lower cost than a conventional earth rod. The earth reference rod provides continuous monitoring of both any earth potential and the system’s PEN function.
No. Ferroamp Emergency Power complies with EN-62040-1 and is classified as a pure UPS solution. It cannot therefore feed electricity into the electricity grid and therefore does not require any prior notification to the network owner.
Ferroamp Emergency Power 1P:
The product is connected to a phase of the building’s power grid, to DC distribution or PowerCase in the Ferroamp system and to the selected single-phase loads to be provided with backup.
Ferroamp Emergency Power 3P:
The product is connected via a fused three-phase group on the building’s power grid, to DC distribution or PowerCase in the Ferroamp system and to the part of the building that is to be provided with backup. In addition, the product has a Schuko socket on the front panel for makeshift loads.
The products have an IP21 protection rating and are intended for installation indoors. For more info on installation, see the installation manual.
NOTE
If Emergency Power 3P is connected before the switchboard to provide backup to the entire house, the EnergyHub must be moved so that it is before Emergency Power in the wiring diagram.
NOTE
Only trained electricians may install Ferroamp products.
The product can be set to three different modes:
OFF – The selected loads are turned off and backup power operation is disabled
BYPASS – The selected loads are supplied only from external power grids, no backup power operation
AUTO – Selected loads are automatically switched between grid operation and backup power operation
The product also has a function for Blackstart. The system energizes and starts ESO and SSO followed by the connection of loads. Note that blackstart only works with up to five DC nodes (SSO, ESO) connected to the system. When using with more nodes, contact Safevolt for consultation.
A light indication on the product shows the current operating status. Values in Ferroamp’s portal or app are not updated during backup power operation because the EnergyHub is then turned off.
To protect the battery during backup power operation, Ferroamp Emergency Power shuts off battery discharge if the SOC reaches 5%. When the sun comes out, the system can be turned on with the black start button so that the battery can start charging again.
Three-phase generators with pure sine wave and sufficient stability of voltage and frequency can be used for Emergency Power 3P. More information about suitable generators will be available in connection with the first deliveries of the product.
The generator can either be started manually if needed or started via a relay contact when the batteries’ SOC goes below a lower level and shuts down when the SOC reaches an upper level.
Ferroamp Emergency Power reads the state of charge (SOC) of the battery and shuts down if the SOC reaches 5% to prevent damage to the batteries. When the sun comes out, the system can be turned on with the black start button so that the battery can start charging again.
Reserve capacity for backup operation by setting the lower limit of the SOC value in the EnergyCloud web portal to the minimum level you want to reserve for backup operation.
The product is manufactured in Sweden and supplied by Ferroamp’s partner Safevolt AB. Support and warranty are provided by Safevolt AB at info@safevolt.se.
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