My system is cut down to a single 10 and two small amps.
Also the batteries I'm running are xs s series batteries
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According to XS Power's website, their group 34 S-series battery (S3400) is 47lbs. I'd say my estimate was pretty accurate.
Unless you're running a bunch of other high amperage electronics, you really don't need two high performance batteries like that. I run a system in my red truck that can draw over 200A in small bursts at full blast and my single Odyssey keeps up just fine. The alternator is what makes the most difference in that situation, anyway.