Inverters

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About Inverters

The inverter is the heart of every photovoltaic system – both technically and strategically. It not only converts direct current (DC) into usable alternating current (AC), but also takes on a wide range of tasks that go far beyond basic energy conversion. 

For installers and system planners, choosing the right inverter is therefore a complex decision with far-reaching consequences. As a PV wholesaler with international experience, Krannich Solar supports professionals in making precisely these decisions.

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The Central Role of the Inverter
 The inverter’s primary function is to convert DC from solar modules into AC for household or grid use – or vice versa. At the same time, it acts as a control center, a safety element, and a communication interface. 
A high-performance inverter has a significant impact on energy yield, system stability, and long-term future readiness. No other component connects as many parts of a PV system – from the generator field to battery storage to energy management. 
Types of Inverters 
At Krannich Solar, we categorize inverters into four main groups: 
Hybrid Inverters 
Hybrid inverters combine solar and battery management in a single unit. They handle both the conversion of solar energy and the charging/discharging of batteries, making them ideal for systems focused on self-consumption and energy independence. 
• All-in-one solution for solar + storage 
• Perfect for new installations 
• Enables smart energy management and backup power 
String Inverters 
String inverters are the most common type used in traditional solar setups. They connect multiple panels in a “string” and convert the combined DC output into AC. 
• High efficiency and cost-effective 
• Best suited for unshaded, uniform panel layouts 
• Centralized monitoring and maintenance 
Power Optimizers 
Power optimizers work alongside string inverters to enhance performance at the module level. They adjust each panel’s output to maximize energy harvest, especially in partially shaded or complex roof conditions. 
• Panel-level optimization and monitoring 
• Ideal for roofs with varying orientations or shading 
• Improves overall system efficiency 
Choosing the Right Inverter – Key Criteria 
Selecting the right inverter depends on a number of technical and contextual factors, including: 
 • String Length, Input Voltage, MPPT Inputs:
Not every inverter handles arbitrary string lengths or asymmetric configurations. Strings must match the MPPT input specifications and voltage range. 
• Battery Compatibility:
Inverter and battery must be compatible – which is not always the case. Our storage overview helps identify suitable combinations.
• Application & Grid Connection:
Must the inverter meet grid constraints (e.g., 70% feed-in rule)? What is the intended application? What other devices must it communicate with? 
• Communication:
Via Wi-Fi, Ethernet, RS485, Power Line Communication (PLC), cellular (4G)? Is it compatible with Smart Meter Gateways? 
 An experienced wholesale partner helps balance technical and economic considerations. 
Standards & Future Readiness Regulatory requirements for inverters continue to rise. Key aspects include: 
• Standard: Inverters must be declared compliant with AS/NZS 4777.2:2020, which is the Australian and New Zealand standard for grid-connected inverters.
• CEC Approval: Inverters must be listed on the Clean Energy Council's (CEC) list of approved inverters.
• Region Settings: Inverters must be configured to the correct region settings, such as "Australia Region A" or "Australia Region B" depending on the specific requirements of the local network.
• Firmware Updates: Inverter firmware should be updated to the latest version compliant with AS/NZS 4777.2:2020. A future-proof inverter should offer modern interfaces, automatic firmware updates, and grid-friendly functionality. This is becoming a decisive factor – especially for eligibility in subsidy schemes or energy trading. Overview of Brands & Technologies The inverter market is broad but far from uniform. Krannich Solar offers a curated portfolio of leading manufacturers with clear technological focus:
• Hybrid inverters: GoodWe, Fronius, Sigenergy, Sungrow, SMA, Selectronic, SolarEdge, LG Energy Solutions
• String Inverters: GoodWe, Fronius, Sigenergy, Sungrow, SMA, Selectronic, SolarEdge, LG Energy Solutions, Redback, Fimer, Growatt
• Power optimizers: SolarEdge, Tigo Energy
 We also supply EMS systems, energy meters, cables and connectors, communication accessories, grid disconnects, backup power solutions, surge protection, sensors, voltage converters, fuses, and more.

Brands include: GoodWe, Fronius, Sigenergy, Sungrow, SMA, Selectronic, SolarEdge, LG Energy Solutions, Redback, Fimer, Growatt.

Often Overlooked Aspects
Beyond performance and efficiency, there are additional factors that are not always evident in datasheets but can make a real difference for installers: 
• Installation Effort:
Device weight, wiring complexity, required training or certification, manufacturer installation support, and on-site conditions.
• Service Access & Remote Maintenance:
Can the inverter be serviced remotely? Many systems support monitoring via app or web interface.
• Accessories & Expandability:
Energy meters, backup power functionality, UPS capability, and additional compatible components – all of these can influence system planning. 
Choosing the right inverter involves multiple technical and economic considerations. As an experienced PV wholesaler, Krannich Solar supports installers, planners, and specialist dealers with product selection, system planning, and logistical support – offering a clearly structured portfolio to meet every requirement.
The inverter’s primary function is to convert DC from solar modules into AC for household or grid use – or vice versa. At the same time, it acts as a control center, a safety element, and a communication interface.
A high-performance inverter has a significant impact on energy yield, system stability, and long-term future readiness. No other component connects as many parts of a PV system – from the generator field to battery storage to energy management.