PV electrical basics

Industry Term

String sizing

String sizing is the process of choosing how many PV modules are wired in series so voltage and current stay within inverter and code limits across expected temperatures.

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What does String sizing mean?

String sizing is the process of choosing how many PV modules are wired in series so voltage and current stay within inverter and code limits across expected temperatures.

How is String sizing used in solar design?

This term affects electrical design, string sizing, code checks, equipment ratings, and safe installation. In solar, the numbers are not decoration; they are the guardrails.

How it relates to Tigo

Tigo provides tools and documentation to help verify string sizing and equipment compatibility.

Tigo Energy, the worldwide leader in Flex MLPE (Module Level Power Electronics), designs innovative solar power conversion and storage products that provide customers more choice and flexibility. The Tigo TS4 platform increases solar production, decreases operating costs, and enhances safety. When combined with the Tigo Energy Intelligence (EI) platform, it delivers module, system, and fleet-level insights to maximize solar performance and minimize operating costs. The Tigo GO Optimized ESS (Energy Storage System), a flexible solar-plus-storage solution for home installations, rounds out the Company’s portfolio of solar energy technology. Tigo was founded in Silicon Valley in 2007 to accelerate the adoption of solar energy, and its global team supports customers whose systems reliably produce gigawatt hours of safe solar energy on seven continents.