Power supply options for SP PRO inverters are via a 240VAC to 5VDC plug pack or a 12VDC to 5VDC adaptor which can be powered from the SP PRO’s 12VDC internal supply. Older SP PRO inverters without a USB port can be connected with the approved RS232 to USB adaptor from Aten, model US-232A.
Power supply for Capstone turbines is via a 24VDC marine grade cigarette lighter socket with a 24VDC USB car charger adaptor.
If you have a fault with the USB power supply, you can replace it with any brand provided that it supports the power source. Most cigarette lighter USB power supplies work with 12/24VDC, but it is wise to check.