If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Mark See 2/4/13 question from me above in comments. This number is rounded to the nearest whole number, and will tell you what battery Amp Hour rating to look for in the selected battery type. 14 amps x 12 volts = 168 watts. Amps calculation with voltage of 120V AC. Admin lease email your question to email@example.com. You can target the Engineering ToolBox by using AdWords Managed Placements. How long a battery can keep delivering a current flow is the capacity of the battery in AMP HOURS which is perhaps what you were asking? If you lost shore power that would happen in less than an hour. How should I size the battery and do you have any comments or suggestions on the inverter I would use. The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF times the RMS voltage V in volts (V):. Therefore 10 lights will be 456 Watts total per hour. The Feit 4' LED shop lights draw about 0.3amps each according to the manufacturer. Choose from Gel, AGM, and Flooded. The lights are the lowest amps at .341. Does not say how many Watts but is says it is only 14A and 12V. The one you have might be more powerful. My 12V car battery has a peak cranking current of 800 Amps. Should I use a deep cycle RV battery?? There is a significant loss of power when energy going into the lamp is actually being used to run it. Wondering if we calculated wrong on the front end…. Unfortunately, our calculators are designed for lead acid batteries. Can anybody Suggest me number of Batteries (Acid) of 200 AH if i have to enpower Load of 1300 Watt for 13 Hours daily. what size battery do I need to run 7 hours? BatteryStuff Tech span class="caps">AGM would work fine. Should contain only letters, numbers, and (' - .)! For Questions and Tech Support, please submit your question with our, Read Knowledge Base in RSS news reader with. 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. Always oversize wires if voltage drop is critical. If the load is DC at 12 volts, then you are looking at about a 200AH battery. Is my favourite saying…. Inverters can add on average 15% inefficiency to the power draw. When I went to pick up my ED car unseen, I asked the service department what sized inverter I could safely put into the car to power my AC adapters. If you have any further questions I would suggest emailing us directly via our email support link. Meaning, I=P/E, etc. amp = watt / volt. The pump is at the highest at 7amps.
We don't collect information from our users. Therefore, each lamp will pull ~4.1 amps each per hour. Bryan Im looking at something similar for sump pump and believe you will need an inverter that can handle a 3600 watts start (120vac x 30amps inrush) so maybe a 2000 watt inverter with a 4000 watt peak may work. Thanks. For 9 lamps and 8 hours, that‘s a total of 295.2 amps pulled from a 12 volt battery source. 6 times . The contrast of battery capacities will cause an uneven charge and discharge cycle. The electrical formula is P=E*I, where P=wattage, E=voltage (12V) and I=amperage. If you want to increase your battery life I would suggest a large AH rated pack, as the less you pull from the battery the longer they tend to last. I could enter each item separately to get amp hours then total the amp hours at the end. If you always taking it to 50% or even going beyond it from time to time then you will most likely be on the low end of the average, so 3 years out of a battery given your load is to be expected.
DS I have totaled my setup that I am building in my Cargo Trailer Conversion to be 16.3 Amps. Wire size based on 3% (0.36 V) voltage drop in a 12 Volt circuit. I would like to go camping every month but the reality is 2-3 times a year for only weekends away and 1 week somewhere special. For a 12V system the maximum voltage drop should be less than (12 V) x 3% = 0.36 V. Conductor sizes (AWG) related to maximum current through a 12V electrical copper wire and length of cable - are indicated below: Note! BatteryStuff Tech 200AH. But you're right, 14A on a 15A circuit is high. The second field is labeled “Load Duration”, which is completely up to the user. On a 12vdc converted to 120v a/c., I want to run a water pump, 120v 8 Amp. However, when the 2 105 @ 20 hrs batteries in parallel are used, and then put on charge after use, the batteries typically register 50% charged. Big cables between batteries and inverter! Michael I have 4 cfl’s /12 volt each…they are rated at 15 watts each….wondered what size AH battery I should use to get maybe 5-7 hrs of use out of lights?
If the pump pulls 5 amps, at 12 volts you are running 60 watts.
Only emails and answers are saved in our archive. Therefore, each lamp will pull ~4.1 amps each per hour. Would an AGM type battery be okay?
BatteryStuff Tech 17 watts / 12.5 volts = 1.36 amps. For DC power supply, amps are equal to watts divided by volts. If you feel comfortable with that, then the 50 AH would work. More is needed for flooded batteries. Emeka Nwokedi Hi, good day, please I have two 12volts/120amp batteries,connected in parallel to my inverter (12volts/1000watts), but I have a rechargeable fan which uses two 12volts/4.5amp batteries connected in series, i want to run the fan/blade directly to the big batteries heads at the same point where the inverter wires join, would it blow the fan? A 12V/30 watt supply translates into a maximum of 2.5 amps of current drain (12V x 2.5A = 30 watts).
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