TDU or TDSP
A transmission and distribution utility owns or operates the poles, wires, meters, and delivery system. It restores delivery service after many local outages and charges regulated delivery rates that usually flow through the retail bill.
REP
A retail electric provider sells electricity plans to customers in competitive areas and generally manages billing and plan-related customer service. The Electricity Facts Label describes plan pricing at stated usage levels.
Why solar owners should care
Solar can reduce purchased energy, but it may not eliminate fixed or non-bypassable charges. Export compensation is usually governed by a retail or utility program and may not equal the retail price. Verify both sides of the bill before estimating savings.