PECO has halted its smart grid installation as of Wednesday.

The smart meter installation has been stopped because of overheating in about 15 homes after a smart meter was installed. In one instance, there was a fire. The utility, which is owned by Exelon and covers 1.6 million electric customers across the greater Philadelphia area, has installed about 186,000 meters to date.

Both the utility and the meter maker, Sensus, are putting safety first, but so far it looks like the meter itself is not to blame.

“There is no evidence that points to a Sensus meter as being the cause of any of these few overheating incidents,” Sensus said in a statement. “While the number is very small, 15 out of 186,000 or 0.008 percent, we continue to work with PECO to identify the root cause.  But as PECO has stated, their investigations have shown existing issues with customer equipment and not the meter itself.”

The news that the meters are safe and the number of fires is small is good news for both Sensus and PECO, but it hardly alleviates the worries of wary consumers, who often hear more anti-smart meter rhetoric than they do positive information.

The problem is similar to other utilities, including BC Hydro, where a few fires stoked smart meter opponents. In a recent story in the Vancouver Sun, the reporter notes that there are about 480 fires related to electrical malfunctions in homes over any given five-year period in British Columbia, and about 22 of those are related to the meter and distribution panel. BC Hydro is using Itron meters. 

That is not to say that any fires resulting from new utility equipment -- in this case, a smart meter -- are acceptable. However, the risk overall, as Sensus notes, has been and remains quite small. But for opponents who claim health and safety concerns, any smart meter issue becomes ammunition.

For PECO, the installation stoppage should offer the utility a chance to come up with best practices after it fully investigates any fires. Are there warning signs of faulty wiring that the utility can offer to people after their meter installation? Is there a dedicated phone number for concerned citizens? Are there certain types of homes that should have an electrical inspection before the smart meter installation?

In Vancouver, the Sun reported the latter was already happening -- more than 1,000 homes where installers spotted problems were repaired by a qualified electrician before the meters were installed.

PECO is aware of problems that can occur. Like BC Hydro, the utility has repaired equipment in more than 4,500 homes before installing a meter. Installers wear fireproof clothing and heavy gloves in case of a short circuit as they remove the old meter, according to the Philadelphia Inquirer.

As part of the investigation, PECO is replacing some of the Sensus meters with Landis+Gyr meters to see if there are any differences in performances. As part of the full meter deployment, Landis+Gyr, Elster and Sensus were already part of the project.

So far, PECO has investigated six of the 15 incidents. “The investigations we have completed so far have shown existing issues with customer equipment -- and although this is not uncommon with the experiences of other utilities across the country, the safety of our customers is paramount and we will always do everything we can to keep our customers safe,” said Cathy Engel Menendez, communications manager for PECO.

All of the installed Sensus meters will get a software upgrade to automatically shut down if they overheat -- and beginning September 6, the Sensus meters will also alert PECO if an overheating issue occurs.