12 volt to 12 volt DC/DC regulators or converters fully isolated, waterproof IP66, marine, industrial and military grade voltage regulators (fully regulated) 60 Watts.
Raspberry Pi Spannungswandler | DC/DC-Konverter 12V zu 5V, 3A, 15W
DC/DC-Wandler, DC/DC-Wandler 5V & 12V | RS
Gleichspannungs-Wandler und DC/DC Ladegeräte
Dc Dc Wandler 12V in Sonstige Elektronik & Messtechnik online kaufen | eBay
12v battery dc to dc charger, dcin charger | Renogy Solar