I am new to micro power grids and learning how to use DC-power storage with AC-powered devices. In researching the topic I have read some unsubstantiated points I want to clarify.
Battery: Apparently some DC-to-AC inverters are not compatible with LiFePO4 battery chemistry. Is this the case, and if so, how does that incompatibility arise? Is it safe to assume DC-to-AC inverters can work with LiFePO4 batteries unless they explicitly say so? As an example, this AIMS 1500W inverter has a manual that does not mention battery chemistries, so I assume it can work with LiFePO4 batteries.
Fuse: I see some inverters come with the option of a fuse kit for the positive wire between battery and inverter, even when the same inverter has all kinds of protections (including over-voltage, under-voltage, over-load cuttoffs). With all those protections, is a fuse only redundant or does it also offer unique protection?
Resistor: This component I am least sure of. Because inverters contain capacitors, connecting them with a battery will tend to spark upon contact. To avoid this being a hazardous spark, adding a resistor in the circuit was recommended. How would such a resistor be sized, and would it be added on the positive wire between battery (or fuse if used) and inverter? Is a resistor only needed for certain types or magnitudes of loads? So far I only plan to power resistive loads of <1000W but I want to understand how the system would need to differ for inductive loads of 1000-3000W continuous, <6000W surge.