@John Smith: There’s a very good reason why lead-acid batteries are commonly used in UPS systems. Lead-acid batteries have a long lifespan when their state of charge (SoC) is consistently kept high. In a typical UPS setup, the battery is not subjected to frequent charge/discharge cycles. Instead, it remains fully charged and is only used in rare cases—such as during an AC power outage. Therefore, the low number of charge cycles is not a disadvantage for lead-acid batteries in this context.
On the other hand, maintaining a 100% SoC is one of the fastest ways to degrade a LiPo battery. LiFePO₄ batteries are a better alternative in this regard—they’re more tolerant of high SoC levels and have a lower risk of fire. However, I’m skeptical that their lifespan would exceed that of lead-acid batteries in a typical UPS scenario. If your use case involves frequent and prolonged power outages, then a UPS with LiFePO₄ batteries would be a better choice. Otherwise, a lead-acid battery will serve you perfectly well. Graham Eddy schrieb am Donnerstag, 2. Oktober 2025 um 11:16:37 UTC+2: > sensor usually has battery backup for months. > sensor controller (eg davis console) usually has battery backup for weeks. > weewx server backup, you are probably looking at SOHO UPS, for minutes to > hours - more than that takes something more sophisticated/expensive like a > portable power station (lithium) or full-blown premises battery backup [i > now have home battery on grid/solar for blackouts] > *⊣GE⊢* > > On 2 Oct 2025, at 5:05 pm, Auchtermuchty Weather <[email protected]> > wrote: > > Now I can use the ecowitt_http driver with backfill, it seems worth giving > the gateway a UPS, but I am totally clueless about what would be suitable. > The longest I've been without power for is almost 2 days. That's > exceptional but I think gives a benchmark for how long the UPS needs to > keep the gateway going. > > -- > 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 [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/weewx-user/b459bf18-bc64-417b-b12f-82e0572cfba5n%40googlegroups.com > > <https://groups.google.com/d/msgid/weewx-user/b459bf18-bc64-417b-b12f-82e0572cfba5n%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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/fd2c3e59-098b-4f89-b9e2-25645dbe720dn%40googlegroups.com.
