Is it dangerous to run a 12V battery?
Also, running a battery hot will drastically reduce its lifespan, and running it really hot is very dangerous. For astronomy equipment the only thing that would put a 12V battery in danger is a short circuit. “12 volt” batteries really run between 11.5 and 14 or so.
How to calculate your 12V power supply requirements?
Ideally you want to aim for a system that has a greater charging capacity than usage. Our rule of thumb is that we only aim to discharge our system by approximately 30% of its capacity. This means we start the next day at 70% capacity. That way we have a greater supply than demand which allows us to be back to 100% capacity early the following day.
How to choose the best 12 volt battery?
As Billydee explained, add up the nominal average current draw from all your devices to be run from the battery (in amperes at 12 volts), multiply by how long you want to be able to run (in hours), double that and then choose a battery with at least that rating of amp-hour capacity.
Can a 12V battery be plugged into an 18v battery?
“12 volt” batteries really run between 11.5 and 14 or so. This makes it easy to measure the life in a battery by simply measuring its voltage. Since 12V lead-acid batteries were originally designed for cars, there is a lot stuff that runs this way. 18V would be risky, I would not try to plug a 12V device into an 18V battery.
How many amps does a 12 volt battery pull?
456 Watts will pull ~41 amps from a 12v battery source per hour. For ten hours, that‘s a total of 410 amps pulled. For a battery recommendation I would at least double this number…so any AGM battery bank rated with 820 Amp Hours or more is my recommendation. More is needed for flooded batteries.
What does 19V mean on a power supply?
It means 19 volts DC. If the supply was labeled 19V~3.42A that would mean 19Vrms AC instead of 19V DC. – MarkU Jan 28 ’16 at 3:21 The weird symbol indicates its a DC output. This laptop adapter supplies an output voltage of 19 V and a maximum output current of 3.42 A, well above your original adapter’s 2A maximum.
What should the Ah rate be for a 12 volt battery?
If you know how much power your application takes to run, and the time you would like to run it, we’ll recommend a 12 volt battery with a safe amount of AH (Amp Hours) that will give you the runtime you need. Battery Needed is rounded to nearest whole number, and is rated in AH at a 20 Hour rate.