What does 50 kW DC or smaller require?

No insurance is required at this size, in the manual’s words not required. A $150 application fee applies. Review is published at 15 business days for facilities up to 250 kW.

What does Above 50 kW, measured in kW AC from here up require?

Insurance becomes mandatory at not less than $1,000,000 per occurrence, and CoServ may require that it be named as an additional insured. The $150 application fee still applies up to 250 kW. Note that the basis of measurement has changed to AC at this point.

What does Over 250 kW AC to 1 MW require?

A $300 application fee applies and review is published at 45 business days.

CoServ distributed generation: tiers, fees and insurance

How the size is measured

the array DC nameplate in kW, applied with no conversion factor. The manual defines kW as kilowatts of direct current for photovoltaic systems of 50 kW or smaller, which covers every residential and small commercial job. Above 50 kW, and for every non photovoltaic technology, CoServ measures in kW AC instead.

Size bands and what each one obliges

50 kW DC or smaller Size 0 to 50 kW	No insurance is required at this size, in the manual’s words not required. A $150 application fee applies. Review is published at 15 business days for facilities up to 250 kW. $150 application fee Visible load break disconnect switch to CoServ’s sole specification, at member cost Membership in the cooperative
Above 50 kW, measured in kW AC from here up Size 50.001 to 250 kW	Insurance becomes mandatory at not less than $1,000,000 per occurrence, and CoServ may require that it be named as an additional insured. The $150 application fee still applies up to 250 kW. Note that the basis of measurement has changed to AC at this point. $150 application fee $1,000,000 per occurrence liability insurance, annual proof, 30 day cancellation notice Plan possibly prepared by a Texas registered Professional Engineer
Over 250 kW AC to 1 MW Size 250.001 to 1000 kW	A $300 application fee applies and review is published at 45 business days. $300 application fee $1,000,000 per occurrence liability insurance
Over 1 MW to 10 MW Size 1000.001 to 10000 kW	A $1,000 application fee applies and review is published at 60 business days. $1,000 application fee $1,000,000 per occurrence liability insurance

The screens that decide it

Within the 10 MW scope of CoServ’s manual Limit 10000 kW.
Facilities above 10 MW of connected generation are not considered under the manual and are handled case by case.
Below the 50 kW point where the basis of measurement changes from DC to AC Limit 50 kW.
CoServ measures photovoltaic systems of 50 kW or smaller in kW DC and everything larger in kW AC. A design near the line must be checked on both readings, because a 49 kW DC array and a 51 kW DC array are not measured the same way and the larger one also crosses into the $1,000,000 insurance requirement.

Ask the utility this, before you sell it

CoServ may require a standard meter socket for a second meter measuring the full output of the system, at member cost. Is one required at this address?
CoServ publishes no fifteen percent screen and no minimum load test. What circuit or transformer limit applies here, and is there headroom?
Engineering fees are published only as as required and are at CoServ’s discretion. What is the estimate for this job?

Worth knowing before you quote

A system is in parallel any time it is connected to CoServ’s system in any way, even if the member does not intend to export, so a non export battery still requires an application. Backup only non export systems under 50 kW pay no application fee and a visible load break disconnect is preferred but not required. There is no net metering: CoServ pays its avoided cost of wholesale power under a separate purchase agreement, and states that it will not make purchases that would breach its all power requirements contracts with its power suppliers. A single generating facility may not serve multiple meters or multiple members. Monthly charges include a $10.00 base plus a $15.00 Distributed Generation Customer Charge.

Source

CoServ Distributed Generation Procedures and Guidelines Manual for Members, February 2026

Read and recorded 2026-09-12. Rural electric cooperative, outside the Texas interconnection standard. The cooperative's own published documents govern. CoServ is the operating name of Denton County Electric Cooperative. The rate side sits in Section 202.19 Generation Export Service of the separate Tariff for Electric Service, which has not been read.

All Texas interconnection rules

Size bands and what each one obliges

The screens that decide it

Ask the utility this, before you sell it

Worth knowing before you quote

What to do with this