Hi.
Years ago, bought a new inverter; 12V to 120VAC/60Hz. Did not work unless the battery was being charged (over 13V) - Returned to vendor.
I used instead, a UPS inverter hooking an external car battery. Same story. Engine had to be running for the inverter to work.
Yesterday got a 400W 12V to 120VAC inverter. Same crap. Red light indicating lack of input. They NEVER work at 12V input. They want over 13V under load.
Any magic to modify them to run from 12V down to 10V input ? Of course no chinese schematics available.
Years ago, bought a new inverter; 12V to 120VAC/60Hz. Did not work unless the battery was being charged (over 13V) - Returned to vendor.
I used instead, a UPS inverter hooking an external car battery. Same story. Engine had to be running for the inverter to work.
Yesterday got a 400W 12V to 120VAC inverter. Same crap. Red light indicating lack of input. They NEVER work at 12V input. They want over 13V under load.
Any magic to modify them to run from 12V down to 10V input ? Of course no chinese schematics available.