Absolutely. Same make/model/brand of batteries. Better electrically and I do really like them for their value and performance.
I am certainly hoping for a slow discharge, I'd be screwed otherwise =( Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mon, May 2, 2016 at 10:29 AM, Mark Radabaugh <[email protected]> wrote: > Josh, > > The math is linear assuming you avoid the extremes (really fast or really > slow discharge). > > 2 12ah 12V batteries in series giving you 2.2 hours of runtime: > > 12 amp-hours / 2.2 hours = 5.45 Amps (per hour) > > add another set of 2 12AH batteries (the two batteries wired in series to > get 24V, and connected in parallel with the existing batteries and the > calculation becomes: > > 24 ah / 5.45 amps = 4.4 hours of runtime > > Or if you prefer to do it this way: > > If you want 48 hours of runtime and draw 5.45 Amps per hour you need 261 > AH of batteries. That could be 2 12V 260AH batteries, or 4 12V 130AH > batteries, or 6 86AH batteries, etc. > > When paralleling batteries add the AH ratings. When putting them in > series use the AH rating for the single unit battery. > > The one thing you should not do is parallel mixed AH rating batteries - > keep them all the same size or you will damage the lower rated batteries > when discharging them. > > Most higher end batteries provide a chart showing the AH rating at various > discharge rates and temperatures. At slow discharge rates (over 48 hours) > most batteries provide more AH than they are rated and far less at very > high discharge rates (under 5 minutes). > > Mark > > > On May 2, 2016, at 10:00 AM, Josh Luthman <[email protected]> > wrote: > > > > I have a 24v site that uses two 12v 12ah batteries. I get about 2h 20m > of run time. > > > > Does it stand to reason if I get eight batteries my run time would be 8+ > hours? Is sizing linear? > > > > Josh Luthman > > Office: 937-552-2340 > > Direct: 937-552-2343 > > 1100 Wayne St > > Suite 1337 > > Troy, OH 45373 > >
