BEMServer vs LOYTEC LWEB-900

BEMServer is an open-source platform for deploying a modular building energy management system. It gathers information from building management systems and sensors alongside weather, occupant feedback, building descriptions, and contextual data. The platform connects building hardware with data-oriented services, storing building models, time series, and events for access through documented REST APIs. Its data model follows IFC and Haystack standards. Processing modules interpret collected information to identify issues or inefficient operation and support recommendations and decisions. Listed modules cover fault detection and diagnosis, renewable energy simulation, energy management, load forecasting, indoor environmental quality, and visualization. The software is licensed under AGPL-3.0, and sellers using a modified version must publish their modifications under that license. There is no software license fee, although installation, configuration, maintenance, and selected modules may be paid services. The maker recommends help from someone with Python and Docker knowledge and says installation was tested on Debian 9. BEMServer currently supports building monitoring; other uses require extending its functionality.

LOYTEC LWEB-900 is building management software for installing, configuring, and operating LOYTEC building automation systems. Its client-server architecture stores system and historic data, access rights, and device configurations in an SQL database. Built-in configuration tools let users create graphical building views with live values, alarms, trend logs, and schedules. Alarms from different sources can be brought together, with email notifications and configurable follow-up actions; schedules can be organized across devices. The software exchanges data with LOYTEC devices across CEA-709, BACnet, DALI, M-Bus, Modbus, and KNX. It can display live images from ONVIF-compatible cameras and map camera events and commands to data points, but it does not record video. The server supports custom Node.js scripts and includes Node-RED. LWEB-900 is deployed on-premise, with Windows, web, Android, and iOS access. Its standard license includes five concurrent LWEB-900 clients and 20 LWEB-802/803/app clients. Pricing is available on request.