According to the Herc II manual it draws 80 to 100 amps for 1 KW input.
Batteries last even better if the discharge is less than 50%.
73, Jerry, K0CQ
On 2/5/2011 2:47 PM, NL7VL wrote:
> Jim,
>
> You are asking what kind of battery capacity you need to run the Herc
> from just batteries, or a PS + deep cycle in parallel? Maybe this is
> not what you what, but it might be useful anyway.
>
> * With the PS + deep cycles:
>
> So the Herc has an input requirement of what - 70 or 80 amps for 500
> watts out? I had an Astron 50 amp adjustable that would foldback the
> current wherever you set it, and I had it in parallel with my
> batteries. I'd use it to float them, too, but I would have maybe 4 RV
> batteries with your setup. I suppose you could do it with 2 and not be
> too hard on them. But a single battery - not sure about that.
>
> * Deep cycles only:
>
> I would have 4 of them - preferably 6 volt batteries in
> series/parallel. The cell plate geometry is larger and will take the
> abuse better than 4 12 volts in parallel. Even with this setup - without
> doing the math (probably get nailed for that) - you can expect a
> couple of hours. You only what to discharge them 50% to preserve their
> lives and ability to hold a charge.
>
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