Maximum efficiency
Inverter efficiency for solar panels.
The efficiency indicator is the percentage ratio between the amount of energy that the device delivers to the load and the energy consumed from the solar panel. The higher this parameter, the more efficient the operation of the device and the lower the losses during conversion. In modern inverters for solar panels, efficiency values of up to 90% are considered average, and above 90% are considered good.
Connection voltage
The efficiency of the solar system, laid down by the manufacturer of the inverter, directly depends on this parameter. The following battery voltage options are most widely used:
12 V,
24 V and
48 V.Maximum charge current
The maximum amount of direct current in amperes that the inverter can convert. If the solar panel produces a current exceeding this value, the inverter simply does not use it. This is often justified when connecting an inverter to high-power solar panels - the maximum input current of the inverter is reduced to acceptable values so that moderate-sized wires can be used to transmit energy.
Operating voltage PV
The operating range of the inverter is usually located between the starting voltage and the maximum voltage. This interval is indicated in volts.
Display
The presence of its own display provides more visual control of the device’s operation. Various operating characteristics can be displayed on the screen: current electricity generation, load level, voltage and frequency in the network, operating mode, battery charge, etc. Inverters are equipped with both simple monochrome displays and full-fledged color panels for visual visualization of parameters.
Cooling
A method of removing heat from the heating elements of the inverter.
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Passive cooling. Passive is any type of cooling that does not involve forced heat removal and is carried out through natural heat transfer and convection. Its main advantage is the complete absence of noise. In addition, such devices are cheaper, do not consume energy to operate the cooling system, and take up relatively little space. On the other hand, passive cooling is significantly inferior to active cooling in terms of efficiency, and therefore is poorly suited for powerful devices.
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Active cooling (fans). Active cooling involves the forced removal of heat from device components through radiators with fans that “blow away” excess heat outside the case. Such systems are characterized by extremely high efficiency and can be used in inverters of any power. However, you will have to put up with increased noise levels, as well as significant dimensions and weight of the equipment. In addition, fans tend to draw dust into the case, and if they break down, the entire cooling system essentially fails. The cost of inverters with active cooling is significantly higher than models with a passive principle of heat removal from internal components.
