powerinverter dual battery isolator relay

Opamp4 now monitors battery#2 condition until its voltage also falls below the 11.5V mark when the situations yet again reverts. The actions quickly disconnects battery1 from the load and connects battery#2 with the load. This time battery2 being the one having higher potential activates opamp2/T2 and the lower relay. Since opamp3 output is connected to the base of T1, the above triggering instantly breaks T1 conduction resetting opamp1 and 2 into its original situation allowing them to yet again track the battery voltages. The moment battery#1 charge reaches around 11.5V set by P2, opamp3 output goes low. In course of time, battery#1 starts getting discharged via the connected loads, and this condition is monitored by opamp3. It means the relays now hold their positions without any further interventions from opamp1 and 2. This in turn activates T1 and it's relay, which instantly disconnects battery#2 from the load.īattery#2 now gets connected with the charger via the N/O contacts and starts getting charged at the relevant current.Īt this point T1 executes two actions: It clamps the inverting input of opamp1 and non-inverting input of opamp2 to ground, latching their positions. Let's assume battery#1 as the charged battery, now when the engine is switched ON, both batteries provide their combined power to the alternator via the relevant N/C contacts.Īs soon as the alternator starts, it powers the opamp circuit so that the opamps 1 and 2 which are configured as voltage comparators are able to sense the connected battery voltages at their relevant inputs.Īs assumed above, since batt#1 has the higher voltage level, triggers opamp1 output high. Initially due to absence of power, the two relays are held at their respective N/C positions which allow the two batteries to get connected in parallel with the load. The proposed design of an automatic dual battery charger with isolator circuit for alternators may be understood with the following given points: Instead of addressing the two batteries as battery#1 and battery#2, I thought it was better identifying them as 'charged battery', and 'partially charged battery'. Thank you so much and more power to you sir! The Design i hope you can help me with this circuits to make. When the low volt reaches 11.5v, the circuit will automatically trigger the relay connecting the fully charged battery 1 parallel with battery2.5.Īfter battery 1 is connected in parallel, a delay relay cut-off will disconnect of battery 2 and engage it for automatic fast charging and to float mode.6.a continuation cycle of relays, monitor, charging. that's it.

before starting, the two agm batteries 1&2 will combine in parallel connections to be used for starting the engine in order to provide smoother and more power to the start.Ģ.Then, once the engine is started, the battery 1 will automatically disconnect via a relay for automatic fast charging until float mode is reached.ģ.while the battery 2 is connected, a voltage low level cut-off circuit will be monitoring its condition until its voltage reaches 11.5v,4. Here is the step of how the circuit may do.ġ. can you guide me with my issues? thanks so much. I have read many of your posted electronics design especially on battery charging circuits 🙂 its very simple and yet reliable and efficient circuits, building those circuits using your designs works great and thank you so much swagatam!īut until, i was thinking an solid-state automatic dual battery charger isolator for deep cycle agm 100ah batteries, i am using some of your design charging circuits and delay and relay techniques, but unfortunately, always got me an error. Very promising circuits you've always shared, actually I always visit your blog coz im also electronics hobbyist from Philippines . Dual or Double Battery Charger using IC 555.

Powerinverter dual battery isolator relay