As I remember the EU specs is 50Hz +/-1%, so all those look good to me. Regarding the battery and backup socket, I guess that must be a Fronius Gen24 Plus with a BYD battery, and the socket would be the PV Point. As just a note, if you don't know it yet, the PV Point socket and the Full Backup operates at 54Hz. It is not really advertised, but the point of it, to knock out any other Inverters as they would detect an out-of-spec line frequency and would shut down.
And if you consider the Enwitec backup box, which as you stated would be more than a 1000 with installation, there is a cheaper box also on the market by Keno the SH-GEN24-SZR, but still around 1000 without installation. I have one, but have not installed it yet, and felt the need recently when the operator did a 3+ hours maintenance and all the UPS depleted in the house. On Thu, 16 May 2024, 16:56 Karen K, <kk4468...@gmail.com> wrote: > michael.k...@gmx.at schrieb am Donnerstag, 16. Mai 2024 um 15:46:28 UTC+2: > > Since the (public) power grid is part of the hardware your local weewx > installation is running on, this is far from being off-topic. > > > There are 3 types of UPS available: off-line, stand-by, and on-line. The > first one is off as long as grid power is available and starts when the > grid power goes off. The second one is similar, but it is in stand-by. So > it start faster than the first one. The on-line one separates the grid and > the output entirely. They are connected by DC only. So this type can > additionally filter surges etc. The output frequency for the on-line type > only depends on the internal circuit, while for the off-line and stand-by > type the output frequency is always the same as the grid frequency. > > I use an on-line UPS and hope that will result in less damage in case of > over-voltage, surges, and lightning strokes. > > To compare to Cameron's histogram I did one myself, based on 5 minutes > averages of the grid frequency (NOT the UPS output frequency): > > [image: netzfrequenzhistogramm.png] > > This one has the peak at 50.00 Hz. > > -- > You received this message because you are subscribed to a topic in the > Google Groups "weewx-user" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/weewx-user/HBDfW-ayRyI/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/78c65e41-5ac1-4e13-9644-e46beb078147n%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/78c65e41-5ac1-4e13-9644-e46beb078147n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAEx3znKcqtDgEtSV%3DFepT-tWLXJO613reTgGx6rfL1hQgPJRqQ%40mail.gmail.com.
