A solid state relay (SSR) is a contrasting option to utilizing a great switch when you need to kill a circuit on or off. The SSR is activated by an outer voltage connected to its control terminal. It has no moving parts and along these lines can work considerably more rapidly and last longer than a conventional switch. In the event that it utilizes infrared light as a contact; the two sides of the hand-off are photograph coupled. The wires of a SSR are littler and of a higher gage than a switch. SSRs are likewise speedier, littler and have a more drawn out lifetime than a mechanical relay. They help increment wellbeing since you're managing a lesser voltage and amperage, giving you a little voltage/amperage controlling a higher voltage/amperage. (According to datasheet of MCTC4825JLB MCTC4825JLB Crydom Co. - Relays - ICRFQ ) For significantly higher voltages a SSR is a great option when a customary switch can't be utilized due to wear out under the current. Solid State Relay (DC/DC): Connect (R) positive terminal to the push button switch. Connect (R) negative terminal to the negative terminal on battery 1. Connect (L) positive terminal to the positive terminal on battery 2. Connect (L) negative terminal to the positive terminal on load. Battery 1: Note that battery one was utilized as detachment. Connect the negative terminal of battery 1 to the negative terminal of the SSR (R). Connect the positive terminal of battery 1 to the push button switch. Push Button Switch: Interface one terminal to the positive terminal (R) of the SSR. Associate the second terminal to the positive terminal of battery 1. Load: Interface the positive terminal of the heap to the negative terminal (L) of the SSR. Interface the negative terminal of the heap to the negative terminal of battery 2. Battery 2: Interface the positive terminal on battery 2 to the positive terminal on the yield. Interface the negative terminal on battery 2 to the negative terminal on the heap. Any better idea would be highly appreciated.