Hey folks, glad to be here. So my question to pose to the collective wisdom in this forum is: how long should a marine battery run a 15 watt appliance through a 300 watt sine wave inverter? It's charged via a 7 amp Coleman charge controller thanks to two 40 watt solar panels. The charge controller doesn't have a float charge; it just cuts out when the green LED says "Charged", and starts charging again (according to the manufacturer) when it hits 13 volts.
I've come to find out that converting amp-hour to cranking-amp battery ratings is quite the research rabbit hole, so it's hard to use straight math to figure out what to expect from my battery. It's at least 5 years old, and I've always kept it charged up with a 500 MA trickle charger. Which comes to my second point: The charge controller doesn't top the charge up like the trickle charger, so I get a bit more time out of it, but that won't help me when I'm out camping... My solar rig is new, and I'll get a new battery if needs be.
Thanks in advance.
I've come to find out that converting amp-hour to cranking-amp battery ratings is quite the research rabbit hole, so it's hard to use straight math to figure out what to expect from my battery. It's at least 5 years old, and I've always kept it charged up with a 500 MA trickle charger. Which comes to my second point: The charge controller doesn't top the charge up like the trickle charger, so I get a bit more time out of it, but that won't help me when I'm out camping... My solar rig is new, and I'll get a new battery if needs be.
Thanks in advance.
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