For: Operators (CPOs) and installers who set up energy management in the Hub
Energy management keeps the combined load of your EVSEs (Electric Vehicle Supply Equipment) within the electrical limits of a building or grid connection. This article explains the model: how a location is built from nodes, how limits work, how capacity is shared, and which charge intent applies to a charge. It is not a step-by-step setup guide.
Where do I find energy management in the Hub?
Go to CPO / Network → Energy management and open the Locations tab. Open a location to see four tabs: Location overview, Topology, Details, and Setup.
The Setup tab has seven sections: Location configuration, Nodes, EVSEs, Meters, Solar panels, Charge intents and Change log.
You can also turn on energy management from a location's own page. Open its Energy management tab and select Enable energy management.
What are locations, the top node, and sub-nodes?
An energy-managed location has one top node, marked Root. The top node represents the grid connection or main fuse. Sub-nodes sit under it and represent distribution boards and circuits. You can nest sub-nodes as deep as you need.
Each EVSE is attached to exactly one node. An EVSE can belong to only one location.
You cannot delete the top node. If you delete another node, everything below it is removed from energy management. The EVSEs themselves are not deleted. They are only detached.
You cannot move a node to a different parent. You can move EVSEs between nodes.
How do node limits roll up the tree?
A node's limits cover the combined load of every EVSE anywhere below it, not only the EVSEs attached directly to it.
All limits apply at the same time. A parent node caps all of its children together. Each child node caps its own branch.
What limits can I set on a node?
Fuse limit
The fuse limit (A) applies per phase. The same cap applies to each of L1, L2, and L3. It is usually the fuse rating.
Buffer
The buffer is headroom kept free below the fuse limit. Enter it in A or %. The usable limit is the fuse limit minus the buffer.
Example: a 100 A fuse limit with a 10 A buffer keeps charging within 90 A per phase.
A buffer needs a fuse limit and must be smaller than it.
Power limit
The power limit (kW) is the total across all phases. Use it for a grid connection or contract cap.
Power limit schedule
A power limit schedule is a weekly schedule in kW. While a time slot is active, it replaces the power limit.
External limit
An external limit is a temporary kW cap that lasts until a time you choose. An external limit of 0 kW stops charging on that node.
When several power limits apply, the lowest one counts.
Node utilisation
Node cards show % of current limit (L1/L2/L3) for the most loaded phase. It is measured against the fuse limit minus the buffer. The card turns amber from 80% and red above 100%.
What are building load and max expected residual?
When a node has a meter, Hub subtracts the measured non-charging load (the building load) from the node's limits. The EVSEs share what is left.
Max expected residual (A per phase and kW) is the non-charging load to assume when the node's meter stops reporting. Without it, the building load counts as zero while the meter is down. Charging can then exceed the limit.
EVSEs with Disable load management turned on are shown as Meter only. They are not controlled, but their consumption still counts against the node's limit.
What are phase setup and phase rotation?
Each EVSE has a Phase setup. The options are:
AC 1-2-3: three-phase, standard wiring.
AC 2-3-1 and AC 3-1-2: three-phase, wired with phase rotation.
AC Phase 1, AC Phase 2, and AC Phase 3: single-phase, connected to that grid phase.
DC 1-2-3.
The digits show which grid phase the EVSE's L1, L2, and L3 are connected to. With AC 2-3-1, L1 is on grid phase L2, L2 is on grid phase L3, and L3 is on grid phase L1. A correct phase setup makes sure load is counted on the right grid phase.
A single-phase EVSE uses capacity on its own phase only. A three-phase EVSE reserves capacity on all three phases, even when the vehicle charges on one.
The location's Grid connection type sets the voltage the Hub uses to convert between A and kW. The options are Three-phase 230/400 V, Three-phase 277/480 V, and Split-phase 120/240 V.
How is capacity shared, and what does priority mean?
Energy management recalculates when charges start or stop and when settings change. It then sends each EVSE a current setpoint (AC) or a power setpoint (DC). This shows as alloc X A on the EVSE.
Energy management keeps charging within the limits. Charges with the same priority share capacity evenly. A charge with a higher priority gets power first.
An EVSE is either paused or charging at no less than its minimum. The default minimum for AC is 6 A. Allow zero current/power to set whether the EVSE may be paused.
Capacity left over after this goes to Charge now charges.
Priority is a number from 0 to 10. A higher number means a higher priority. Priority does not decide which charge intent applies. It only ranks charges that run at the same time when there is not enough capacity for all of them.
What are charge intents?
A charge intent decides how a charge is charged. There are two types:
Charge now: charges as fast as the limits allow, until the target.
Price optimize: uses the cheapest hours before the departure time. It needs a target, a departure time, and an Electricity price area at the location.
The target is a battery level (SoC, state of charge, in %), an energy amount (kWh), or both.
Schedules can replace an intent during set time windows.
Which charge intent applies to a charge?
Hub decides this once, when the charge starts. The first matching source wins, in this order:
RFID › User › Account › Vehicle › EVSE › Site default
The Hub shows this order above the Charge intents table. Here, Account means the account that pays for the charge.
A smart charge that the driver sets in the Monta app takes precedence over all of these.
What is the difference between active and inactive locations?
While a location is Inactive, energy management calculates but does not send limits to the EVSEs. The EVSEs are not controlled and the limits are not enforced.
To activate a location, go to Setup → Location configuration and use Location active status in the Danger zone.
Activation fails if an EVSE is still in an old Hub load management group. Locations brought over from such a group start as Inactive.
What is Electricity price area?
Electricity price area is a setting on the location that price-optimized charging needs. Pick the day-ahead market area this location buys electricity in, for example DK1. Set it under Setup → Location configuration → Electricity price area.
The Price optimize charge intent needs an Electricity price area. None (load balancing only) means load management only, with no price optimisation.
Which EVSEs can I add to a location?
The EVSE must be operated by the operator and connected via OCPP (Open Charge Point Protocol). EVSEs without a serial number cannot be attached.
The EVSE picker starts with the location's own account. Select Search all accounts to include the operator and its sub-operators.
Can I add EVSEs owned by a Private account?
Yes. Here, Private means the account type, not the Private access setting. An EVSE owned by a Private account works the same way as any other, as long as you operate it and its model supports load management. Ownership, access, visibility, and billing stay with the owning account.