We have positioned our panel on the western wall of the house so it only captures an hours sun at sunset. You don’t want to to over charge the battery and risk boiling it dry.
#12 volt water pump for aquaponics full
There is no need to mount the solar panel in full sun all day. With a little solar charger constantly trickle charging the battery for only an hour a day – we’ve found its enough to keep the system full charged and able to keep the system running all night if the need arises. Our old battery ran out of grunt after 2 hours. We’ve noticed from hard experience that unless you recharge the battery regularly, come the day there is a power failure – the battery may not have a sufficient charge to do the job properly. You can buy a small solar panel for charging battery’s with clamps on ebay for around $60. We’ve made a modification to the backup system by fitting a very inexpensive 5 Watt solar panel to trickle charge the 12v battery every day and keep it fully charged. Very simple.īattery’s do lose their charge over time. The instant the mains power goes off the 12 volt system will start, and the instant 240 volt mains power is restored the 12 volt system switches off. When 240 volt goes off the relay closes and 12 volt power flows through from 12 volt battery to the aeration or bilge pump device. While there is 240 volt power the relay is held open and no 12 volt power flows to the 12 volt water or air pump. You will notice in Figure 3 we have a 12v car battery and behind it a small box or backup power fail switch with a relay switch. So how does the 12v pump spring into action in the event of a mains power failure? Dissolved oxygen gets returned back into the water and the fish are able to survive – for as long as the little bilge pump is able to function. You can see it in action in Fig.1 squirting a stream of water into the fish tank.Ī small 12 volt bilge pump keep the water in the fish tank circulating and splashing the surface.
You will never appreciate having a battery back up system installed – until the night of a storm and the power gets suddenly turned off. Thats why battery backup systems are a wise investment. The aerator is switched off and no oxygen to a tank full of fish means the end to a dream – very quickly. Finish their project and forget to plug the aquaponics system back into the mains. They need the power to run a drill or circular saw on the weekend. Sometimes people do it foolishly themselves.
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