ACH refers to a network that facilitates electronic money transfers between financial institutions, such as banks and credit unions. In the context of Special Purpose Vehicles (SPVs), ACH is commonly used by investors to transfer investment funds to the SPV. While ACH transfers typically take around three business days to process, they are characterized by low fees, often less than one dollar. In contrast, wire transfers are processed more quickly, often on the same day, but may involve higher fees. Both ACH and wire transfers are widely used and effective methods for moving funds for SPV investments.