Victron - Inverter 12/3000 230V VE.Bus [PIN123020000] Orion-Tr DC-DC Converters with galvanic isolation but isolates the starting battery

but isolates the starting battery when charging ceases so you never get stranded

see its product page

and user-friendly solution

PowerAssist

Victron - Inverter 12/3000 230V VE.Bus [PIN123020000] Orion-Tr DC-DC Converters with galvanic isolation but isolates the starting batteryPure sine wave output, high peak power and high efficiency. Combined high frequency and line frequency technologies ensure the best of both worlds. SinusMax Superior engineering Developed for professional duty, this range of inverters is suitable for the widest range of applications. The design criteria have been to produce a true sine wave inverter with optimised efficiency but without compromise in performance. Employing hybrid HF technology, the