OPTIMISATION FROM HUAWEI
Optimisation of the photovoltaic installation based on the Huawei inverter and optimisers is a new solution, an additional option to consider when designing the best solution for our installation.
What is the idea behind optimisation? In traditional systems, where modules are connected in series, the shading of one module has a negative impact on the operation of the other modules, reducing their efficiency. If, on the other hand, an optimiser is connected next to a shaded module, the operation of the other modules will not be adversely affected. The diagram of how optimisers work is best explained in the following figures - a comparison of systems with and without optimisers.
Modules without optimisers and their performance under partial shading of one module.
The same modules with optimisers.
Huawei optimisers can be used in two system configurations:
- full system optimisation possible - optimiser placed next to each module in the system
- selective optimisation of the system - individual modules or one of several chains
When fully optimised, the system offers the following additional capabilities:
- Rapid Shutdown security system - de-energising the modules (the voltage on each module is stepped down to 0V) in the event of the inverter being disconnected from the mains, switching off the power supply to ensure safety during a service or rescue operation. With this system, for installations above 6.5kW there is no need to install additional DC circuit breakers, reducing installation costs.
- Individual module monitoring - the possibility of observing in the application the yields of all modules separately, easier servicing and detection of possible problems such as contamination or failure of individual modules.
- Possibility of making better use of available roof space - the possibility of spreading the modules on several roof slopes, in different directions and at different angles of inclination, as well as in places where they may be periodically shaded (e.g. closer to a chimney or bay window).
- Possibility of creating longer chains - For three-phase installations, modules of up to 10kW can be daisy-chained. This reduces installation costs - reducing the number of wires, connectors or protections.
What does the power optimiser look like?
Huawei SUN2000-450W-P Optimizer It has dimensions of approximately 7x14x3cm. There is one universal model with a power output of 450W, a maximum input voltage of 80V and a short-circuit current of 13A, so it can be used with almost all photovoltaic modules available on the market.
