Solar monitoring / Zero-export / BESS control / Energy management
Twilight Solar Energy engineers the layer between your panels, your battery and the grid — field hardware, live monitoring and control logic that keeps every 30-minute block under your maximum demand target.
Different hours bring different risks. Morning is about seeing every device; midday is about not exporting what the grid won’t take; twilight is when the battery earns its keep; night is for the numbers. We build for all four.
Inverters, strings, meters and sensors polled over Modbus and MQTT, time-stamped and stored, with alarms the moment one goes quiet.
When generation outruns the load, JS Aegis trims inverter output in real time so the connection point never exports beyond what your approval allows.
Our controller watches the running 30-minute average and dispatches the BESS before a new maximum demand is set — holding back an SoC reserve for the unexpected.
Yield, availability and demand compiled automatically and waiting in your inbox and on the EMS by morning — with the battery recharging off-peak.
One live view of every inverter, string, meter and sensor — with years of history kept online for audits and warranty claims.
Export limiting at the point of connection, driven by the site SmartLogger and battery, so your system stays inside its grid approval.
Battery controls that protect the 30-minute block average rather than chase spikes — sized from your real load profile, not a brochure.
A multi-site EMS for owners and O&M teams: live plants, yield, alarms and automated daily reports, all behind one sign-in.
4G IoT SIMs, fibre runs and external antennas for hard-to-reach plant rooms, with private VPN tunnels and encrypted MQTT back to base.
High-rate telemetry stored in time-series databases, archived to the cloud and restorable on demand — the foundation for our load-forecasting R&D.
Enclosures and gateways that turn a solar install into a site you can see and control. Existing clients can order directly through the Order Portal.
An industrial PC, router and communications hardware in one enclosure. Aegis talks to the site SmartLogger and battery, holds export to the limit your connection allows, and gives our engineers a secure way in when something needs attention.
Pre-wired digital power metering for the incomer or feeder — the readings that zero-export and peak-shaving logic depend on, reported over Modbus.
EnquireBrings loggers, meters and sensors onto one network and sends their data to the cloud — the backbone of every monitored site.
EnquireFibre termination for long runs between inverter fields and the control room, where copper can’t carry data reliably.
EnquireExternal antenna enclosure that lifts 4G signal out of basements, plant rooms and remote rooftops.
EnquireIrradiance, module and ambient temperature, and weather sensing for performance-ratio and yield analysis. Pyranometers specified by ISO 9060 class.
EnquireTwo web platforms run alongside the hardware. Clients use them every day to watch generation and to order, track and warranty equipment.
Live output, alarms and yield for every plant in your portfolio, with daily reports and the history behind them.
Request quotations, confirm orders, track delivery and download invoices. Every serial-numbered unit gets its warranty registered the day it ships.
Accounts are issued to clients and partners. New to TSE? Request portal access.
A cross-section of what our team has delivered and what is on the bench now. Client names are withheld; ask us for references relevant to your sector.
Six operating solar plants brought onto one energy management platform with live inverter, meter and yield data for the owner and O&M team.
Inverter and per-phase readings polled over Modbus into a time-series database, feeding the plant dashboard and daily yield.
Inverter fleet streaming over MQTT Sparkplug B, with yield tracked phase by phase so a single weak phase can’t hide in the total.
Huawei inverters and SmartLogger read over Modbus TCP and streamed to the cloud, giving two plants the same live view and alarm rules.
Group EPCC project by JS Solar Sdn Bhd — the kind of solar-plus-storage site our controls and monitoring are built for.
A battery integrated with an existing solar system to cut maximum demand, with Node-RED, Modbus and MQTT proven end-to-end on site.
A DIN-rail industrial controller reading the grid meter and battery PCS, holding each 30-minute block under target — with load forecasting planned on top.
Solar sensor data ingested over MQTT into a SCADA HMI for operators, with time-series charts for the engineering team.
The on-site controller compiles each day’s yield and emails the report to the owner automatically — no spreadsheet, no login.
Inverter data over RS-485, sent as lean MQTT over TLS and budgeted to run a decade on a 500 MB lifetime data plan.
A hub-and-spoke VPN giving engineers and telemetry a private, encrypted route into remote sites without exposing them to the internet.
High-rate plant telemetry archived hour by hour to cloud storage and restorable on demand, so no plant history is ever lost.
Most engagements follow the same five steps, whether it’s one rooftop or a portfolio of plants.
We audit what’s on site — inverters, meters, loggers, network — and read your last 12 months of TNB bills.
Communications architecture, export limits and, where it pays, a BESS sized on your real load profile.
Enclosures wired, gateways configured and data flows tested before anything reaches site.
On-site integration with SmartLogger, meters and battery; export and demand limits verified live.
Your plants go live on the EMS with alerts, daily reports and continuous tuning.
Twilight Solar Energy Sdn Bhd is a wholly-owned subsidiary of JS Holding Berhad. We carry forward the monitoring and controls R&D that began inside JS Solar Sdn Bhd, and we are extending it into IoT, energy management and battery management systems.
Group figures: 2025 IPO prospectus and independent market research report.
Behind every TSE site sits that group’s construction experience — and a team that writes its own flows, wires its own enclosures and answers the phone when a plant goes quiet.
Send a recent TNB bill and a single-line diagram if you have one. We’ll come back with what we’d monitor, what we’d protect, and whether a battery would pay for itself.