Live Overview
See Power Flow, electrical values, operating state, and live mini graphs for the battery system at a glance.
APEXone product
APEXpulse
Real-time battery monitoring and control over Modbus TCP
Monitor live values, inspect cell data on compatible models, control charging behavior, and manage schedules from a clean iPhone app.
Supports Marstek Venus E 3.0, Venus E 2.0 (Gen 2), and Venus C/E Gen 1. Connection method depends on your battery model.
Feature highlights
Focused battery control without the clutter
APEXpulse keeps the most important battery data and controls close at hand, with a layout designed for fast decisions and quick checks.
Battery Vitality
Track temperature, cell delta, cycle information, and other live indicators that help explain battery behavior.
Cell Insights
Inspect individual cell voltages and cell imbalance on compatible models, including the Venus E 3.0.
Control & Scheduling
Use capability-dependent controls for charging, discharging, power limits, backup, and schedules.
Screenshots
See APEXpulse in action
These screens are being refreshed to show the current product, from live overview and vitality insights to telemetry, graphs, controls, and scheduling.
Overview / Power Flow
Overview / Power Flow
See live battery power, AC power, state of charge, and visual mini graphs in one focused view.
Battery Vitality
Battery Vitality
Read temperature, cell delta, cycle information, and electrical context from live battery data.
Multi-battery Overview
Multi-battery Overview
Keep multiple connected batteries visible with their current status, power, capacity, and temperature.
Cell Insights
Cell Insights
Inspect individual cell voltages and live cell delta on compatible battery models.
Live Graph
Live Graph
Open a metric for a focused live graph built from the current foreground session.
Live Telemetry
Live Telemetry
Explore grouped live sensor readings, temperatures, energy values, connectivity, and device information.
Controls
Controls
Use available controls for charging, discharging, backup, power limits, and operating modes.
Schedule Editor
Schedule Editor
Set charge, discharge, and anti-feed slots with a clear visual timeline editor.
Pricing
Free vs Pro
Start with the essentials in Free, then upgrade to Pro for deeper insight, control, and multi-battery support.
APEXpulse Free
Everything you need to get started.
- Real-time battery monitoring
- Basic battery overview
- Live graphs
- Up to 2 batteries
APEXpulse Pro
Everything in Free, plus advanced insight and control.
- Cell Matrix Overview on compatible models
- Direct Battery Control
- Visual Time Scheduling
- Multi-battery support for 3+ batteries
€14.99 one-time purchase
No subscription.
Setup
How setup works
The app uses a local network flow. Check your battery setup, connect the battery or gateway to the network, scan, and start monitoring.
1
Update firmware
For the Venus E 3.0, update to firmware v144 or later to enable its built-in Modbus TCP support. Venus E 2.0 (Gen 2) and Venus C/E Gen 1 use an external gateway instead.
2
Connect to your local network
Connect the battery or its gateway to your local network. The network connection depends on your battery model.
3
Scan your network
Open APEXpulse and scan for supported batteries or gateways on your local network.
4
Connect and monitor
Select your battery and start monitoring live data.
Requirements
Connection requirements
These are the practical conditions APEXpulse needs to reach a supported Marstek battery over Modbus TCP.
- Supported Marstek battery: Venus E 3.0, Venus E 2.0 (Gen 2), or Venus C/E Gen 1
- Venus E 3.0: firmware v144 or later and built-in Modbus TCP over LAN / Ethernet
- Venus E 2.0 (Gen 2): external Modbus RTU-to-Ethernet / Wi-Fi gateway
- Venus C/E Gen 1: external Modbus RTU-to-Ethernet / Wi-Fi gateway
- Phone and battery or gateway on the same local network
Connection note
For the Venus E 3.0, the built-in Modbus TCP server supports one simultaneous client connection. Disconnect the other client for a direct connection, or use a Modbus TCP proxy when both services need access.
Home Assistant
Using Home Assistant?
Home Assistant is not required by APEXpulse. It can run alongside the app when the battery or gateway connection is configured so both services can access the data they need.
- Marstek Cloud API or Local API These connections do not use Modbus TCP, so they leave the battery’s Modbus TCP connection available for APEXpulse.
- Venus E 3.0 with Modbus TCP directly The Venus E 3.0’s built-in server permits one simultaneous client. Disconnect Home Assistant and let APEXpulse connect directly, or use a Modbus TCP proxy in Home Assistant so both can connect.
- What to do next Disconnect the other Modbus client when only APEXpulse is needed, or use a proxy when both services need simultaneous access.
- Multiple batteries or proxies Venus E 2.0 (Gen 2) and Venus C/E Gen 1 These models use an external Modbus RTU-to-Ethernet / Wi-Fi gateway. Multiple-client behavior depends on that gateway, so follow its documentation when sharing access with Home Assistant.
FAQ
Questions answered up front
Short answers to the common setup and compatibility questions people ask before they install the app.
Why does APEXpulse require LAN?
On the Marstek Venus E 3.0, built-in Modbus TCP is available through the LAN port and does not work over the battery’s Wi-Fi connection. Venus E 2.0 (Gen 2) and Venus C/E Gen 1 use an external gateway, whose network side may use Ethernet or Wi-Fi.
Can Wi-Fi stay enabled?
Yes. Wi-Fi can stay enabled on the Venus E 3.0, but APEXpulse connects through its LAN interface because that is where built-in Modbus TCP is available. For Gen 1 and Gen 2 batteries, the gateway may use Ethernet or Wi-Fi.
Why is my battery not found?
Check that your battery family is supported and that the battery or gateway and phone are on the same network. For a Venus E 3.0, verify firmware v144 or later and check whether another service is using its single Modbus TCP connection. Disconnect that client or use a proxy if both services need access.
Does APEXpulse work with Home Assistant?
Yes. For a Venus E 3.0, stop Home Assistant’s direct Modbus TCP connection while using APEXpulse, or use a proxy so both can access the battery. For Gen 1 and Gen 2, the required gateway determines how multiple clients are handled.
Which Marstek batteries are supported?
APEXpulse supports Marstek Venus E 3.0, Marstek Venus E 2.0 (Gen 2), and Marstek Venus C/E Gen 1. Compare your battery with these supported families before connecting.
Do Gen 1 and Gen 2 batteries need a gateway?
Yes. The Venus E 2.0 (Gen 2) and Venus C/E Gen 1 use Modbus RTU / RS-485, so a Modbus RTU-to-Ethernet / Wi-Fi gateway is required. APEXpulse connects to the gateway over the local network, not directly to RS-485.
Is APEXpulse affiliated with Marstek?
No. APEXpulse is an independent app and is not affiliated with or endorsed by Marstek Energy Co.
Support
Request support
Send a support request directly from the page. This opens an email draft to the APEXpulse support address below.
Get started
Ready to monitor your battery system?
Install APEXpulse, scan your network, and take control of your battery setup.