Advice/recommendations for how to power pumps using solar

Author	Message
TimD Newbie Joined: 23/02/2021 Location: United Kingdom Posts: 32	Posted: 05:35pm 07 Sep 2025       Hi Mike, Thanks very much for your reply.  These pumps actually have the float switches built in, so presumably the idea would be that the 'Load' output directly drives the relay coil, and the relay contacts control the battery supply to the pumps (which are wired in parallel).  This will mean that the coil will continuously draw a few tens of mA while the battery is above the controller's threshold voltage, but I guess that's not a big deal. Would I need a flyback diode across the relay coil, or would the charge controller be resilient enough without it? Regards, Tim.