Auchtermuchty Weather <[email protected]> writes: > 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.
First, I recommend against "lithium ion" aka "lithium nickel managanses cobalt" as too unstable to be in a house in greater than phone/laptop quantity. UPS units are designed for much shorter runtimes. Power is needed to run the UPS and the inverter even at tiny load. I have never seen one that would go for more than few hours. If someone has a UPS that can go 24h with a 10W load, please post details of the UPS and data from your experiment. If your load that you want to keep up is 12V or 5V, then I would look into a LiFePO4 battery and a small dc-dc converter to e.g. 5V USB, with a LiFePO4-specific charger. For extra points, get a 50W or more solar panel permanently mounted outside with a LiFePO4-specific solar charge controller, and then you should be able to keep your weather logger up indefinitely. The first step is to get a power meter and see what you need, and then to understand the rest. It's cool to hear how many of this (not representative of the general population surely) group have home batteries integrated with solar. They are fairly rare around me (the subsidies in the US have been focused on generation not storage, and few people seem to value being able to use their solar during grid outages), but becoming increasingly common. I know one person with it operational and another whose system is about to be commissioned. -- 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/rmiikgxzfh9.fsf%40s1.lexort.com.
