I initially read the following extract on DSC and thought that this isn't a restriction on total bhp, but how much can be delivered in one go.
"The WMSC approved the Endurance Commission’s proposal to limit the releasable power for energy recovery systems in LMP1 cars on safety grounds, to “avoid the possibility of deployment of an instantaneous total power (engine + hybrid) of over 1000hp.” ..."
I will wait the revision to the technical rules to see hsow this has been interpreted