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Let's say I have a 1000W "true sine" inverter linked to a 12V lead-acid battery. Note my inverter will allow 2 kW peak load for a short period of time (for example to start an inductive load)

I want to find a safe way to link that battery to my electric Car accessories battery (which is a 12V lead-acid battery linked to a 400V to 14V DC-to-dc converter.

I want to be able to charge anytime while inverter is running and at with a potential low voltage home battery. I intend to use a 20A buck converter that will be setted to 13V, between my car and my home battery. Can I safely assume the current in my cable will never exceed 20A and my car will be protected against potential inrush current ?

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  • \$\begingroup\$ You can assume what you want but without a schematic nobody is going to say yes or no. \$\endgroup\$ – Andy aka Nov 5 '19 at 8:26

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