Stovalldb Posted June 5 Share Posted June 5 Need some help. Trying to set up a solar powered pump system to lower the water level in a retention pond. No WiFi. So need to set up a Shelly device to first only have the pump operate after dusk to insure the batteries have had time to recharge during the day. But need to have a way to block the pump to be turned on if the voltage in the batteries are below a certain voltage. If the voltage is high enough the pump will turn on but then turn off, again when the batter voltage level reaches a certain lower voltage Quote Link to comment Share on other sites More sharing options...
Integrators Heinz Posted June 10 Integrators Share Posted June 10 @thgoebel @Olsche Any thoughts on this? Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted June 10 Members Share Posted June 10 (edited) Time control without WiFi will be not very reliable - the internal clock of a Shelly will show a certain deviation after some days. Moreover, scenes with sunrise or sunset are not available without WiFi. A possible workaround would use a Shelly UNI plus with an additional light sensor (third party component, e.g. sold by shellyparts), which is connected with a digital input of the UNI plus and a monitoring of the battery voltage with the ADC port of the UNI plus. The required rules could be implemented via a simple script. Edited June 10 by thgoebel 1 Quote Link to comment Share on other sites More sharing options...
Administrators Olsche Posted June 10 Administrators Share Posted June 10 @Stovalldb Which battery voltages should be measured here? 56 minutes ago, thgoebel said: A possible workaround would use a Shelly UNI The only thing to add is that an additional relay is required which switches the pump load when a Plus Uni is used 1 Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted June 10 Members Share Posted June 10 (edited) Thanks, @Olsche! My reply was on a higher lever level - we don’t know much about the pump! And there are other restrictions and preconditions to observe, like power supply voltage and current drain of the pump… Edited June 10 by thgoebel Quote Link to comment Share on other sites More sharing options...
Integrators Heinz Posted June 10 Integrators Share Posted June 10 @Stovalldb can you provide more details to the pump and your type of setup then one could provide a solution for your use case Quote Link to comment Share on other sites More sharing options...
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