[QUOTE=TurnerFam;131268][QUOTE=RvEd;131264][FONT=Arial]
I’d likely only run the microwave for 2-3 minutes... I’d run two 225ah lithium batteries.
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are these 6v batteries? if so, and in parallel, they'll then be the 12v the Inverter needs, but also now 1/2 the stated ah of the batteries - so 112.5 ah for the battery bank.... and, since the typical understanding is that 50% of the battery bank power is what you should try not to go 'lower' than, you will have around 60ah of usable battery power, roughly speaking.
if they are 12v batteries, then you'll have about 120ah...though 12v batteries aren't the typical 'deep cycle' that the Inverter can make best use of
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I haven’t run across any 6-Volt lithium batteries (not saying they may not exist), but if they were 6 Volt, they would have to be wired in series, which yields the full 225 Ah at 12 Volts.
If they are 12-Volt (most likely case), then they would require wiring in parallel with total of 450 Ah at 12 Volts.
Also, lithium batteries are usually rated to be discharged to 80% or 100% as usable capacity, so numbers are not the same as flooded or AGM. More importantly, lithium batteries hold their voltage at high discharge currents, so Inverter won’t likely trip due to low voltage as with flooded batteries. Lithium technology isn’t perfect, but for high-power applications like running a microwave or especially starting an A/C, it’s hard to beat. And I’m not saying that a microwave can’t be powered with flooded or AGM because it’s done all the time if sized and wired correctly.
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