Battery questions
I know there are some very knowledgeable folks on this topic, hoping you'll chime in. Current set up is a small 17' hybrid that HAD a new (Costco), single group 27 12v (105 AH) battery. I use a 20...
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time2roll wrote:sportsman 500 wrote:Sine wave? The heater does not care but the electronic controls may fail.
Been lurking here following this thread. I have a similar question but different hardware. I have a Kuerig coffee maker that brews one cup at a time. The initial warm-up lasts around or under 3 minutes drawing 1500 watts. The water tank re-heat cycle after brewing is 200-400 watts and lasts around 60 seconds. At idle the Kuerig draws 60 watts.
I would be running this with a 3000 watt inverter solely for the coffee maker. Trying to keep weight down I would like to keep it to 1 group 27 or 31 deep cycle. How long do you guys think the one battery would go if starting from fully charged?
Why 3000 watts rated to run 1500 watt appliance?
I think Kuerig makes a 'hotel' version that draws closer to 700 watts and would be far better on inverter and small battery.
Yes the battery may brew a few cups but you are going to kill the battery with very hard use.
To properly drive 3000 watts you should have 6+ batteries. Even at 1500 watts you should have three or more. The Peukert effect will have a single battery depleted twice as fast as a normal calculation. Then you need to charge it up 6+ hours to go again the next day.
3000 Watts ? I'd like to know too..
here are some figures to look at for battery capacity vs discharge
using your 1500 W load and normal deep cycle lead acid batteries.
1500 W @ 12 V = 125 Amps needs a 500 Ah battery with 2 AWG cable minimum
1500 W at 24 V = 62.5 Amps needs a 250 Ah battery with 6 AWG cable minimum
1500 W at 48 V = 31.25 Amps needs a 125 Ah battery with 10 AWG cable minimum
for AGM you can half these capacities
for Li you can go one third.
see where this is going ? i'm using c/4 here and that's high for solar re applications, normal would be c/6 or c/8 however this is rv and you have more room to abuse batteries.. LOL
pulling 1500W from a tiny group 27 is going to kill it very quickly.
if you REALLY want to stay with 12 V batteries then I suggest you
use a 12V 200Ah 4D AGM, it's heavy, expensive and can discharge at c/2 comfortably and will last longer than abusing a G27
