VisBlue - Indoor Module Battery

Battery size: 10/40 // 10/50 [kW/kh]
Tank size: 1000 & 1250 [L]
Footprint: 2081 x 1240 [mm] (Bx L)
Height: 1800 //  2100 [mm]
‍Weight tanks/rack: 2800/450 // 3300/450 [kg]
Design life: 20,000/20 [cycles/year]

Communication: Remote access through LAN with open control through Modbus TCP (address list upon request)
‍Battery control: Charge/discharge is controlled by input from energy meter. Charge/discharge is controlled by input from external master.

Electrolyte temperature: 0 t0 +35 [°C]
Humidity: 95% RH non-condensing
Ventilation: Depending on installation location. Cooling/heating can be installed.
‍Safety: Non-flammable and non-explosive. Water-based electrolyte

Peak charge/discharge power: 1.1x nominal power. 5 min. on/off
‍DC-efficiency (stack): 87 [%]. DC-roundtrip includes both charge/discharge efficiency. Depending on load profile.
‍AC efficiency (system) @ nominal power: 67 [%]. AC-roundtrip includes both charge/discharge efficiency. Depending on load profile.
‍DC voltage: 40 to 60 [V]
‍AC voltage: 1 x 230 // 3 x 400 50Hz [VAC]
Grid connection: 1 to 3 [phase(s)]
Depth of charge/discharge: 3 to 80 [%]
Response time: <20 [ms]
‍Self-discharge: <0.3% of full capacity per day (pumps stopped). <100Wh per day for 33kWh systems.

• Scalability
• Lifespan of 20+ years
• Safety - non-flammable and non-explosive
• Sustainable product
• Maximise the use of your renewable energy sources
• Reduce carbon emissions
• Make grid purchase savings
• Intelligent monitoring and control

A vanadium redox flow battery (VRFB) has two separate tanks, one containing a positive electrolyte and one negative electrolyte. Both electrolytes consist of the element vanadium dissolved in sulphuric acid, with the vanadium occurring in different oxidation states (valences).

The battery has a number of battery cells as well. Each of these cells is divided into two chambers separated by a membrane, through which the ions can pass. In each chamber there is a positive or a negative electrode. The two electrolytes are pumped through the cells on their side of the membranes.

The current from the solar panels is fed down into the cells’ electrodes, where it moves electrons from the positive to the negative electrolyte, charging the battery as the liquid flows back into the tank. During discharge, this process is then reversed.