The circuit is to switch the voltage for battery charging circuit and not allow the solar power to 'other load' circuitry.
- The charge current is set to 1A where in this configuration it draws only 125mA. The diodes D1, D2, D3 are SS34A.
- When removed D2 and applied supply voltage to solar source it works fine.
- When I replace all the diodes to 1N4004, the circuit draw sufficient charge current.