Reliability Approach | SolarEdge Critical Power

Reliability Approach

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Our modular UPS are hardwire connected to AC mains, powers up critical loads and control the power stability. Therefore, an ultimate UPS reliability is required to provide a consistent, regulated and stable AC output to the loads regardless of the AC/DC input.

The essence of the SolarEdge Critical Power reliability strategy is a physics and statistical-based multi-level method of failure point identification and control. Providing maximum system operational availability is achieved through a combination of reliability oriented and integrated quality management system (QMS) design rules including,  a selection of top-tier suppliers, acceptance testing of their components which were manufactured in well-controlled environments and accelerated lifetime testing (burn-in) of the system and its components which were conducted up to the wear-out point in order to determine when the product will fail, at what rate and by which failure mechanisms.

Multi-Level Reliability

Our critical power systems multi-level reliability plan involves design analysis and qualification by in-house and external labs, sub-system testing by accelerated life testing (ALT) of critical components, and integrative testing of prototypes and large sample groups.

As part of these efforts, all the critical components are evaluated in accelerated life chambers (burn-in, thermal cycling and so forth) as well as product in field tests and stress tests. These tests have run well over the expected life cycle of power modules. The lessons learned are invaluable and as a result, SolarEdge’s critical power Systems produces unsurpassed reliability.

In order to verify that each modular UPS product that leaves manufacturing plants conforms to our high reliability and quality standards, each component, sub-assembly, and final product are tested multiple times during production. These tests include automatic optical Inspection, in-circuit testing, board and component-level functional Testing, safety testing, integrative stress testing and final automated test plan/automated test report (ATP/ATR). These rigorous screening and testing procedures are completed for 100% of the products we make prior to shipment, enabling us to guarantee that our modular UPS products work as expected for the entire product lifetime.

The Benefit of Modular UPS Architecture

The most comprehensive way to increase the reliability of a UPS and the availability of power is best achieved by considering two things – removing single points of failure and adding redundancy.

With a modular UPS design the critical load is shared over a series of power modules, so the UPS is not reliant on any one module to ensure continuous availability.

In a redundant UPS system, all power modules are active and share the load equally. Should one power module fail, the remaining power modules take over the missing load instantly.

The modular UPS not only provides the maximum availability, but also the ultimate reliability which enable the critical power units to go uninterrupted.


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