diff --git a/src/main.c b/src/main.c
index e5e29bf..a663072 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,6 +16,7 @@
 
 #include "led_chplex.h"
 #include "charge_pump.h"
+#include "power_switch.h"
 
 volatile int wait_frame = 1;
 
@@ -102,10 +103,13 @@ int main(void)
 	bool ledtest_done = false;
 	bool startup_done = false;
 
+	uint8_t switchtest = 0; // FIXME: delme: just for testing
+
 	init_clock();
 	init_gpio();
 
 	charge_pump_init();
+	power_switch_init();
 
 	led_chplex_init();
 	led_chplex_on(LED_CHPLEX_IDX_SOLAR_ON);
@@ -119,9 +123,34 @@ int main(void)
 			ledtest_done = ledtest(timebase_ms);
 		} else if(!startup_done) {
 			charge_pump_start();
+			power_switch_load_on(); // FIXME: just for testing!
+
 			startup_done = true;
-		} else if(timebase_ms % 500 == 0) {
-			led_chplex_toggle(LED_CHPLEX_IDX_DISCHARGE_PULSE);
+		} else {
+			if(timebase_ms % 500 == 0) {
+				led_chplex_toggle(LED_CHPLEX_IDX_DISCHARGE_PULSE);
+			}
+
+			// FIXME: just for testing
+			if(timebase_ms % 3000 == 0) {
+				switchtest++;
+
+				if(switchtest & 0x01) {
+					power_switch_solar_on();
+					led_chplex_on(LED_CHPLEX_IDX_SOLAR_ON);
+				} else {
+					power_switch_solar_off();
+					led_chplex_off(LED_CHPLEX_IDX_SOLAR_ON);
+				}
+
+				if(switchtest & 0x02) {
+					power_switch_load_on();
+					led_chplex_on(LED_CHPLEX_IDX_LOAD_ON);
+				} else {
+					power_switch_load_off();
+					led_chplex_off(LED_CHPLEX_IDX_LOAD_ON);
+				}
+			}
 		}
 
 		led_chplex_periodic();
diff --git a/src/pinout.h b/src/pinout.h
index 5dfd3ce..340bcf7 100644
--- a/src/pinout.h
+++ b/src/pinout.h
@@ -17,4 +17,14 @@
 
 #define CHARGE_PUMP_DRV_PIN  GPIO8      // Timer 1, Channel 1
 
+/* Solar switch */
+
+#define SOLAR_SWITCH_PORT     GPIOA
+#define SOLAR_SWITCH_PIN      GPIO11
+
+/* Load switch */
+
+#define LOAD_SWITCH_PORT     GPIOA
+#define LOAD_SWITCH_PIN      GPIO12
+
 #endif // PINOUT_H
diff --git a/src/power_switch.c b/src/power_switch.c
new file mode 100644
index 0000000..d5764dc
--- /dev/null
+++ b/src/power_switch.c
@@ -0,0 +1,52 @@
+#include <libopencm3/stm32/gpio.h>
+
+#include "pinout.h"
+
+#include "power_switch.h"
+
+void power_switch_init(void)
+{
+	// Solar switch: output, initially low = off
+	gpio_clear(SOLAR_SWITCH_PORT, SOLAR_SWITCH_PIN);
+	gpio_mode_setup(SOLAR_SWITCH_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SOLAR_SWITCH_PIN);
+
+	// Load switch: output, initially low = off
+	gpio_clear(LOAD_SWITCH_PORT, LOAD_SWITCH_PIN);
+	gpio_mode_setup(LOAD_SWITCH_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LOAD_SWITCH_PIN);
+}
+
+
+void power_switch_solar_on(void)
+{
+	gpio_set(SOLAR_SWITCH_PORT, SOLAR_SWITCH_PIN);
+}
+
+
+void power_switch_solar_off(void)
+{
+	gpio_clear(SOLAR_SWITCH_PORT, SOLAR_SWITCH_PIN);
+}
+
+
+bool power_switch_solar_status(void)
+{
+	return gpio_get(SOLAR_SWITCH_PORT, SOLAR_SWITCH_PIN) != 0;
+}
+
+
+void power_switch_load_on(void)
+{
+	gpio_set(LOAD_SWITCH_PORT, LOAD_SWITCH_PIN);
+}
+
+
+void power_switch_load_off(void)
+{
+	gpio_clear(LOAD_SWITCH_PORT, LOAD_SWITCH_PIN);
+}
+
+
+bool power_switch_load_status(void)
+{
+	return gpio_get(LOAD_SWITCH_PORT, LOAD_SWITCH_PIN) != 0;
+}
diff --git a/src/power_switch.h b/src/power_switch.h
new file mode 100644
index 0000000..8f4ab10
--- /dev/null
+++ b/src/power_switch.h
@@ -0,0 +1,16 @@
+#ifndef POWER_SWITCH_H
+#define POWER_SWITCH_H
+
+#include <stdbool.h>
+
+void power_switch_init(void);
+
+void power_switch_solar_on(void);
+void power_switch_solar_off(void);
+bool power_switch_solar_status(void);
+
+void power_switch_load_on(void);
+void power_switch_load_off(void);
+bool power_switch_load_status(void);
+
+#endif // POWER_SWITCH_H