diff --git a/hardware_components/ohmpi_card_3_15.py b/hardware_components/ohmpi_card_3_15.py
index 8a95e6bb731069c2903c36021f55c270a4587af1..d7c40c244a675cab4a68c3b517f2fa2402afe7b4 100644
--- a/hardware_components/ohmpi_card_3_15.py
+++ b/hardware_components/ohmpi_card_3_15.py
@@ -41,7 +41,7 @@ TX_CONFIG['current_max'] = np.min([current_adc_voltage_max / (TX_CONFIG['r_shunt
 # TX_CONFIG['voltage_max'] = np.min([pwr_voltage_max, TX_CONFIG.pop('voltage_max', np.inf)])  # V
 TX_CONFIG['voltage_max'] = TX_CONFIG.pop('voltage_max', np.inf)  # V
 TX_CONFIG['voltage_min'] = -TX_CONFIG['voltage_max']  # V
-# TX_CONFIG['default_voltage'] = np.min([TX_CONFIG.pop('default_voltage', pwr_default_voltage), TX_CONFIG['voltage_max']])  # V
+TX_CONFIG['default_voltage'] = np.min(TX_CONFIG.pop('default_voltage', np.inf), TX_CONFIG['voltage_max'])  # V
 # TX_CONFIG['pwr_switch_on_warm_up'] = TX_CONFIG.pop('pwr_switch_on_warmup', pwr_switch_on_warmup)
 TX_CONFIG['mcp_board_address'] = TX_CONFIG.pop('mcp_board_address', tx_mcp_board_address)
 TX_CONFIG['low_battery'] = TX_CONFIG.pop('low_battery', low_battery)