November 21, 20205 yr I have a 260 watt 24 volt submergible pump and two 195 watt solar panels which ae putting out 38 volts Firstly will this hurt the 24 volt pump . Second its pumping too muck water so is it possible to put a timer between the pump and panel's?
November 22, 20205 yr On 2020/11/21 at 10:09 AM, Michael Cnich said: Firstly will this hurt the 24 volt pump . Hard to be certain, but I'd say probably yes. It would be ideal to use a solar pump device, which will limit the output voltage, and also get the most out of the panels in poor light conditions. The timer will need a DC rated relay, which is not common. Most AC relays can handle up to 30 VDC, so if you have a device to limit the voltage, you might get away with it.
November 22, 20205 yr The devices used for this are referred to as charge controllers but they can be used in any application. There are 2 types of these (MPPT and PWM). See the Victron article below to highlight the differences. If your'e adventurous you could try a DC-DC Buck converter. You'll need on with a high enough voltage. e.g. https://www.mantech.co.za/Datasheets/Products/DC-DC-12A-100W.pdf Any of these devices can switch the load with a regular timer by accessing the circuit,, White-paper-Which-solar-charge-controller-PWM-or-MPPT.pdf
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