The term "SOL ID" appears to have different meanings depending on the context. Here are some possible interpretations based on the search results:

• Unique code for bank branches: According to a post on NoBroker forum, SOL ID may refer to a unique code that banks branches are allotted. This code may be used to identify a specific branch for transactions or other purposes. For example, a PDF document from JK Bank lists SOL ID codes for various branches in different districts and tehsils.
• Digital banking system: SOL Banking System is a digital solution in the banking sector, which is a wholly owned subsidiary of SOL Software Private Limited. It offers various services to financial institutions worldwide, including core banking, online banking, mobile banking, tablet doorstep service, wallet solutions, biometric information capture in KYC, payments with multi-currency support, treasury, origination, and analytics. SOL Banking System also provides customized services for credit unions in Panama and Latin America. It has features like corporate multi-currency accounts and email money for its retail customers.
• BaaS infrastructure: Solid is a modern banking-as-a-service (BaaS) infrastructure that allows users to create accounts, send payments, and issue cards instantly. It has built a comprehensive governance and compliance program with its sponsor banks to help FinTechs build, launch, and scale their offerings quickly. Solids bank security comes built-in, with encryption, atomicity, consistency, isolation, and durability (ACID).
• Branch name: A PDF document from PNB lists SOL ID codes for various branches of Punjab National Bank. Similarly, a PDF document from Union Bank of India lists SOL ID codes for various branches in different zones and RCC names.

Therefore, SOL ID can refer to a unique code for bank branches, a digital banking system, a BaaS infrastructure, or a branch name depending on the context.