Updated 2025-12-15
ESO (Energy Storage Optimizer) is Ferroamp’s battery management unit.
The BMS (Battery Management System) is the battery’s internal control system.
A charge cycle means that you have used the entire capacity of the battery once.
For example:
If you use half the battery’s capacity (50-100%), it corresponds to half a charging cycle and you need to charge in and out twice between these values before you “consume” a cycle.
The size of batteries is indicated by two digits: the first digit indicates the storage capacity in kWh and the second digit indicates the power at which the battery can charge and discharge in kW.
The power is determined by the type of battery and the number and power of the ESOs that connect the battery to the Ferroamp system.
Capacity for different configurations of Pylontech Force H3.
Ferroamp’s batteries are based on lithium iron phosphate (LiFePo), which is a battery chemistry characterized by being thermally stable. This means that the batteries are fireproof and do not cause uncontrollable battery fires thanks to the fact that the risk of a thermal runaway is very low.
The EnergyHub is powered by AC, which means that together with the battery and everything connected to the DC grid, it will be turned off when the power goes out. To use the battery in the event of a power outage, a backup to EnergyHub is required.
Most batteries on the market occasionally need to activate certain features to ensure proper operation and long life. To maintain proper operation and lifespan over time, batteries need to be balanced regularly.
Ferroamp is now fully automating this process to ensure the performance for our customers. LFP batteries need to be balanced so that the battery cells in the system are as similar as possible to achieve optimal performance over time. EnergyHub performs this by responding to commands from the battery’s BMS, which indicate when balancing needs to be done.
Balancing takes place during the night between 23:00 and 04:00 to minimize disturbances. It usually takes between one and two hours, but in exceptional cases, it can take up to 30 hours. Our ambition is to eventually offer users the opportunity to decide when the balancing should take place. Note that this applies to software version 5.9.0.
This applies to our different types of batteries:
Batteries from Pylontech
Balancing takes place when needed, but at maximum three-month intervals. This means that the battery is being recharged. Even if you have set charging restrictions, the battery will be charged. When balancing is complete, it will return to the previous settings.
PSM Batteries
Cycling take place about once a month by performing a full charge cycle, which means that the battery cycles from 100 to 0% and from 0 to 100%. Even if you have set charging restrictions, the battery will be fully charged. When balancing is complete, it will return to the previous settings.
If for any reason the balancing is interrupted or not completed on time, the procedure will be repeated the next night.
The following applies to batteries from PSM and Pylontech.
BEFORE SHUTDOWN:
AFTER SHUTDOWN
Shutdown for each battery
PSM
Turn off the power to the battery controller (BMS) by either unplugging it (if it is in a 230 V socket) or breaking the safety switch in the electrical cabinet that feeds the battery.
NOTE: It is not enough to simply turn the knob on the BMS to “OFF”.
Pylontech ESS/Force H3
Turn off the switch (PowerSwitch) on the back of the battery BMS.
Ferroamp can only be responsible for the functionality of the system of the batteries that Ferroamp itself sells.
There are other batteries on the market that can be connected to the Ferroamp system via ESO. Please note, however, that when purchasing these, all support, service and handling of warranty issues are handled by the person responsible for the integration.
Yes, you can combine different types of batteries from different manufacturers in the Ferroamp system. In the Ferroamp system, these will be seen as one large battery. It may therefore be good to keep in mind that limit values for how much the battery can charge and discharge, SoC, are adapted accordingly.
There are two ways to tell if the battery is in contact with your EnergyHub.
1) EnergyHubs display.
Hold your finger on the EnergyHub display for 5 seconds to enter the service menu. Then swipe in any direction until you get the “ESO status” view and see if the ESOs have been found. You can also hold your finger on each ESO to see the battery voltage and other values.
2) In EnergyCloud
When the EnergyHub is connected to EnergyCloud, you can click on “System Settings” and then “System Topology” to see if the ESOs in the battery have been found.
Test that the battery is working by activating in and discharging in manual mode. Discharge the battery down to the set minimum SOC level, then recharge the battery to the set highest SOC level. Read more about how under “Battery settings”.
More articles
