One shared setpoint
Only the devices needed are used, the emptiest first when charging, then the setpoint is shared according to each one's maximum power.
Virtual battery
Several batteries, any brand, controlled as one
Two, three or ten batteries, one logic: TED Energy Controller combines them into a virtual battery and shares every watt between them, from Home Assistant.
Sounds familiar?
- You follow each battery's level separately, with no overall view.
- One battery hits its minimum while another is still full.
- Adding a battery means rethinking everything.
- Your batteries have different capacities and power ratings, and nothing accounts for it.
Why it is hard
Each battery has its own inverter, maximum power, state of charge and often its own app. Giving them all the same setpoint does not work: a device limited to 800 W and another to 2,400 W cannot take the same share, and an almost empty battery should not discharge as much as a full one.
To make them behave as one, you need logic that works out the power to supply or absorb, then shares it at every moment according to what each one can do: maximum power, state of charge, limits, availability.
That is the core of a multi-brand HEMS: a virtual battery that brings heterogeneous devices together behind a single setpoint.
The solution
The features involved
Each one's limits
Maximum charge and discharge power, minimum and maximum state of charge: every device stays within its own limits.
Failures absorbed
A device that stops responding or ignores its setpoint is set aside, the others make up for it, then it is retested automatically.
Inverter clusters
Group several inverters into a cluster: average state of charge and a shared setpoint, like a battery within the battery.
Getting it running
- 1
Bring each battery into Home Assistant
Install each brand's integration and check that state of charge, power values and the setpoint show up.
- 2
Add your inverters
For each one, pick its entities and its maximum charge and discharge power, then test communication.
- 3
Choose the mode
Autonomous to regulate the whole set around your target, assisted to keep one brand's HEMS and add the others as reinforcement.
- 4
Let the control loop work
The dashboard shows the split in real time. A battery added later simply joins the set.
See it working before you install it
The live demo shows the real interface on a working installation: energy flows, inverters, batteries, settings.
Frequently asked questions
Do the batteries need to be identical?
No: capacities, power ratings and brands can differ. The split takes into account what each device can do.
How many batteries can be combined?
There is no software cap with an ACCESS or FULL POWER license; the FREE license controls 2. Monitored batteries are unlimited.
What is a cluster?
A group of inverters you choose to handle together, with an average state of charge and a shared setpoint. Handy for several identical devices.
Other problems solved
Make several battery and inverter brands work together
Each manufacturer app ignores other brands. Here, they all work together under one setpoint.
Read the solutionMultiple batteries oscillating or passing energy back and forth
Each battery corrects the meter on its own and fights the other. One setpoint, computed for all of them, ends the ping-pong.
Read the solutionProtect your solar batteries: thresholds, power limits, faulty devices
Thresholds, maximum power, faulty devices excluded then retested: each battery stays within its limits.
Read the solutionReady to make all your batteries work together?
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