TCAP tells Parker council aggregated purchasing can lower prices but TDSP and ancillary fees remain a concern

At a workshop preceding the Jan. 20 Parker City Council meeting, Margaret Summery, executive director of the Texas Coalition for Affordable Power (TCAP), urged municipal officials to consider aggregation as a tool to stabilize electricity costs and manage billing complexity in the ERCOT market.

"We're gonna talk tonight about the electric grid...especially probably hearing it now with our weather's event coming this weekend," Summery said, opening TCAP's presentation. She explained that ERCOT—the Electric Reliability Council of Texas—operates wholly within Texas and is overseen by the Public Utility Commission, and described ERCOT as the system operator that "tells the generators we need more power over here."

Summery outlined TCAP's municipal aggregation model: the nonprofit pools municipal load (TCAP reported about 173 members in ERCOT, with 95 in the North Zone) and negotiates wholesale contracts designed to flatten members' load profiles so municipalities buy energy in blocks at lower effective prices. She described TCAP's strategic purchasing method—buying one‑year contracts two years in advance to take advantage of price dips and to avoid carrying charges built into longer contracts.

Summery said TCAP charges an aggregation fee that appears on members' bills (quoted in the presentation as roughly "1.2" mills per kilowatt) and described an internal escrow/truing practice to smooth ancillary and congestion cost variability across quarters rather than passing spikes immediately to members. She said TCAP had issued membership refund checks in recent years when operating results allowed, and that the organization seeks to avoid broker conflicts of interest.

Council members asked TCAP to provide historical performance data comparing TCAP outcomes with market averages. "I will get with my energy consultant and we will pull that data together," Summery responded when asked for evidence of performance since TCAP adopted its current purchasing approach in 2023.

Summery also warned council members about the size of line charges assessed by the local TDU/billing entities. "Encore charges are making up anywhere from 50 to 75% of the entire bill," she said, noting that such line charges—rather than commodity costs—are a major driver of higher city bills and are the subject of ongoing PUC proceedings.

Council members requested follow‑up: staff asked TCAP to provide comparative pricing data and requested more detail about the aggregation fee and contract terms. Summery offered to supply performance reports and to have TCAP's consultants work with Parker staff on contract and procurement questions.

The workshop was informational; no council action was taken at the meeting to change contracts or membership.