Compare the plug shapes, voltage and frequency in Thailand and Solomon Islands, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Thailand, you will need a travel adapter for Solomon Islands. Thailand uses Type A/Type B/Type C/Type O plugs, and Solomon Islands uses Type I, so the pin shapes will not fit any wall socket.
Thailand (home)
Solomon Islands (destination)
Electrical specifications in Solomon Islands
Voltage
Frequency
More about plugs in Solomon Islands
In Solomon Islands, the standard power plug is Type I. The country runs on 230 volts at 50 Hz. That means every wall socket in Solomon Islands is the same shape — Type I, and your plug needs to physically match the socket to fit.
Full Solomon Islands plug guide