Power limitations
Charging constrained by a fixed supply that cannot easily be upgraded.
Load balancing · Multi transformer
SiteManager: multi transformer load balancing for EV charging sites
Central EV Charger Load Balancing Software
The estate-scale complement to LinkRay. SiteManager coordinates power across many LinkRay units, multiple meters, switchboards and transformers, so a large, complex site stays reliable, responsive and within its grid connection limit, without upgrading the site's power infrastructure.
Overview
One framework to balance a complex estate
SiteManager handles multi transformer EV load management for charging estates with real complexity: multiple meter points, several transformers or switchboards, mixed voltages and phases, and many LinkRay units, all coordinated from one place.
Where a single LinkRay balances the chargers on its connection, using an optional meter for additional control, SiteManager sits above the estate, reading every LinkRay in real time and reallocating power so a large site behaves as one coordinated system rather than a collection of separate ones, all while each connection stays within its own safe limit.
Key benefits
- Dynamic power distribution across multiple LinkRay devices
- Supports up to 64 LinkRay units, each managing up to 100 chargers
- Compatible with both AC and DC charging systems
- Monitors multiple meter points across a single site
- Accounts for transformers, switchboards and supply restrictions
- Multiple voltage and phase support, including external building loads
- Flexible connectivity - Ethernet, Wi-Fi or cellular
- Remote access for monitoring and configuration
Local control and fast response
Coordination from above, decisions made locally
Every load balancing decision on a connection is still made by the LinkRay attached to it, in real time, without waiting on a remote server. SiteManager's role is to set the ceiling each LinkRay works within: reading every meter and every connected device, and adjusting group and site-wide limits so the estate as a whole stays inside its supply.
- The dashboard refreshes every few seconds, so an estate with dozens of meters and LinkRay units is never far from the current picture
- Group limits let different switchboards, cable runs or site areas share a single ceiling, dividing it automatically between the LinkRay units in that group
- Minimum and maximum limits can be set per LinkRay, giving fine control over individual connections within the wider estate
Secure by design
The same local-first approach to security
SiteManager and LinkRay share the same security model: nothing about keeping the estate within its power limit depends on a public-facing service.
HTTPS web interface, with the option to upload your own signed server certificate so the browser warning goes away once configured
Passwords are changed from their defaults as a standard step during setup
Two-factor authentication is available on any account with access to live chargers
Remote access to third-party devices on the network runs through SiteManager's or LinkRay's own proxy, one controlled connection at a time, rather than exposing chargers, meters or routers directly to the internet
The problem
Don't let power limits hold you back
Managing power distribution across a growing, increasingly complex charging estate gets harder the moment demand approaches the limit of the supply, and harder again once that supply is split across several meters, transformers or switchboards. These are the challenges SiteManager is built to solve.
Mixed-use sites
Complex sites where buildings and EV charging draw on the same connection, sometimes across several transformers.
Blind capacity
Suspected under-use of available power, with no easy way to measure it across multiple meters accurately.
Over-specification
Higher operational cost from over-provisioning to sit safely under static limits.
Remote estates
Sites spread across a wide area that need configuring and monitoring without easy access by engineers to the site.
Mixed hardware
Chargers from different manufacturers, combining fast DC and slower AC, sometimes across several switchboards.
How SiteManager works
Monitor, analyse, adjust, continuously
SiteManager runs a constant loop across the estate: measuring real usage, working out the best distribution for the site's actual electrical topology, and reallocating power to where it delivers the most charging.
01
Monitor
SiteManager tracks overall site power usage in real time across every LinkRay device and every connected meter, alongside other draws on the supply such as buildings and street infrastructure.
02
Analyse
Advanced algorithms calculate the optimal power distribution for the site's actual electrical topology. Whether the site is three-phase, split-phase or spread across multiple voltages and transformers, it is handled the same way.
03
Adjust
Power is dynamically allocated across the LinkRay estate for maximum efficiency, with group-level limits for different switchboards or cable runs, minimum and maximum limits per LinkRay, and time-based profiles where the energy provider supports them.
Built for complex, growing estates
Multiple meters, transformers and switchboards, one picture
Real sites are rarely one clean connection. SiteManager is built around the complexity that actually shows up on site.
Multiple meter points on a single site
Each LinkRay reads its own meter, and SiteManager reads a further meter for overall site monitoring, so nothing is invisible.
Transformers and mixed voltages handled automatically
A site stepping down from 10kV to 400V, or from 600V to 208V, is supported directly, with SiteManager monitoring the meters on both sides and each LinkRay managing its own area.
Two-phase to three-phase conversion supported
Alongside three-phase and split-phase systems, so a mixed electrical topology is handled the same way as a simple one.
LinkRay groups divide the estate
By switchboard or cable run, with a shared limit across the group automatically split between the LinkRay units inside it, and an upper limit set per LinkRay on top.
Coordinates up to 64 LinkRay units
Each handling up to 100 chargers, for as many as 6,400 chargers across one estate.
Any mix of AC and DC chargers
From any manufacturer, treated as one coordinated system rather than separate installations.
The hardware
A compact unit at the head of the site
SiteManager runs on a compact Versinetic unit with antenna connections for Wi-Fi and cellular, Ethernet and RS485 connectivity, and a 12 V DC supply. CE and UKCA marked, ready to install alongside your site metering.
Works with LinkRay
The layer above LinkRay, not a replacement for it
LinkRay is the local, subscription-free load balancer that manages the chargers on a single connection, up to 100 per unit, deciding locally and continuing to work even without an internet connection. SiteManager is the layer above it: coordinating up to 64 LinkRay units as one estate, sharing power intelligently across every connection, meter and site, while leaving each LinkRay to keep making its own local decisions.
Start with LinkRay on a single site and scale to SiteManager as the estate grows. The two are designed to work together, with control and visibility at both levels.
Explore LinkRayEstate at a glance
- LinkRay units per SiteManager
- Up to 64
- Chargers per LinkRay
- Up to 100
- Chargers per estate
- Up to 6,400
- Charger types
- AC & DC
- Meters per estate
- One per LinkRay, plus one for SiteManager
- Connectivity
- Ethernet · Wi-Fi · Cellular
Why SiteManager
Optimise the infrastructure you already have
01
Built by charging engineers
Developed by a team that has spent years delivering EV charging systems, including a fully integrated V2G platform. Tried-and-tested technology that just works.
02
Broad compatibility
Tested with the main brands of EV charger across both AC and DC, so a mixed estate behaves as one coordinated system.
03
Efficient operation
Maximise usable charging capacity while minimising the cost of over-specifying the connection to the grid.
04
Local or remote access
Monitor and configure at both the SiteManager and LinkRay level, on site or over the network, with regular updates to keep pace with the standards.
Modular EV charging technology
Part of the wider range
Load Balancing · Up to 100 chargers
LinkRay
Subscription-free dynamic local load balancer, the per-connection layer SiteManager coordinates.
OCPP · Controller
MantaRay
Smart charge point communications controller for AC and DC chargers, new or existing.
Engineering Delivery
How we work
Expert engineering support to integrate, configure and deliver your charging estate.
FAQs
Your top queries answered
What is the difference between LinkRay and SiteManager?
LinkRay is the local controller that manages the chargers on a single connection, up to 100 per unit, deciding locally with no cloud dependency. SiteManager is the layer above it, coordinating up to 64 LinkRay units as one estate, sharing power intelligently across every connection, meter and site.
Does SiteManager make the load balancing decisions, or does LinkRay?
Every load balancing decision on a connection is still made by the LinkRay attached to it, in real time. SiteManager's role is to set the ceiling each LinkRay works within, reading every meter and adjusting group and site-wide limits so the estate stays inside its supply.
How many LinkRay units and chargers can SiteManager coordinate?
Up to 64 LinkRay units, each handling up to 100 chargers, for as many as 6,400 chargers across one estate.
How does SiteManager handle sites with multiple transformers?
SiteManager reads meters on both sides of each transformer directly, so a site stepping down from 10kV to 400V, or from 600V to 208V, is supported without extra hardware. Two-phase to three-phase conversion, and three-phase and split-phase systems, are all handled the same way. Each transformer's LinkRay units share a group limit, split automatically between them, so no single transformer is asked to carry more than it safely can.
Does SiteManager work with mixed AC and DC chargers from different manufacturers?
Yes. Any mix of AC and DC chargers, from any manufacturer, is treated as one coordinated system rather than separate installations.
Is SiteManager secure to run on our network?
Yes. It shares the same local-first security model as LinkRay: an HTTPS web interface with the option to upload your own signed certificate, passwords changed from their defaults as standard during setup, two-factor authentication on any account with access to live chargers, and remote access to third-party devices routed through a single controlled proxy connection rather than exposed directly to the internet.
Scope your multi transformer estate
Work out what your site actually needs
Tell us what you're building and our engineers will help you scope the fastest, lowest-risk route to market. A conversation directly with the people who design Versinetic's modular EV charging technology.