We all know that pv systems depened on much more than pv modules,doing
your homework will help a lot.
I am a certified PV installer and would like to give a few hints. Inverters come in different brands and sizes ,but we need to know their functions and features as well, we can start by identify basic waveforms types and properties.A wave form is the shape of an electrical signal that varies overtime.
Also the basic types of inverters used in PV system,PV modules produce variables DC power.However,most electrical appliance operate using AC loads, so DC power must be transformed into AC in order to be useful.Inverters allow to operate both AC and DC electrical loads.
Inverters for PV systems are broadly classified as either stand-alone or interactive inverters.The difference is whether the inverter is installed on a Pv array or the battery bank.Pv arrays and batteries have different characteristics which affects inverter design.
Stand-alone inverters are connected to the batteries as the DC power and operate independently of the PV array and the utility grid.PV modules charge the batteries but do not directly influence the operation of the inverter.
Interactive inverters are connected to, and operate in parallel with,the electric utility grid.Interactive inverters are loaded by the DC source,not the AC output,so AC loads do not directly impact the operation of the inverter.Before the purchase of an inverter differentiate between inverters and power.Solar inverters used in PV systems include a number of basic and optinal features,such as performance data,operating limits,installation requirements,safety,and maintenance.All the information is located on the inverters nameplate and product manuals.
The principal inverters specification is the power rating.Stand- alone inverter the power rating limit the power it can deliver to AC loads,interactive inverter ,the power rating limits the power it can handle at its DC input.
Inverters are available from many manufacturers from 700Watt for small residential system to over 500KW for commercial and utility scale.
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