Why Is There Import/ Export to Grid

Battery Storage systems work on cause and effect’, meaning that the battery system needs to determine changes to the installation environment – load, PV generation, grid frequencies etc. – to then respond to those changes. Therefore, although extremely fast, the Lux system cannot be 100% accurate. The monitoring is a tool to look back at the performance of your system. You can see current data, but it is NOT real time data. It is just a snapshot of information which refreshes every 3 minutes. So you must allow systems to refresh and use the data and graphs to analyze performance.

Do not think that because the data looks unusual there is any problem, you need to allow it to refresh, here is why:

As loads in the property increase or decrease the electrical supply from the grid is instant. Inverter will continually monitor and adjust to any load requirements within 3 seconds.

The monitoring data shown on the monitoring platform is a snapshot (split second of data) taken every 3 minutes. The accumulation of this data is shown on the internal Data section of the system. The snapshot data remains on the monitoring display until the next snapshot is taken and the monitoring refreshes.

Therefore, if that snapshot is taken as loads are changing the split-second data will show for 3 minutes while the system continues to adjust and react within seconds.

For Example, the load is 300w, and the battery is discharging 300w to supply the load, then the load requirement changes to 170w, then the excess energy of 130w will momentarily feed to the grid. If the snapshot happens at that moment, it will show 130w export on the monitoring for 3 minutes, although the system will have then adjusted within seconds.

The inverter detects the load change through the external CT clamps (with a 500-millisecond reaction time) which continues to feed information to the Lux unit, which will therefore react accordingly.

The opposite is therefore also true, so if the load is 170w and increases to 300w, there will be a very brief moment where there is 130w coming from the grid until the 2 second reaction allows the battery side to discharge.

The speed and reaction time of the Lux units is tested and certified. The Monitoring platform is provided free of charge as a portal to the system overall performance, but is not live, and therefore must be used and interpreted accordingly.