I will add pictures when everything is done and cleaned up right now it's all a work in progress. ordered a new 400watt HPS Bulb and Digital balast according to a post on another forum that's 4.55 amps my main battery is rated for 120 amp hours (Energizer Deep Cycle Battery) waiting for more batteries. (4-11 batteries needed depending on the type of battery) (The inverter and ballast use some power)
"The formula is Amps = watts / volts.
So your 400w lamp, plus 100w for the ballast totals 500w / 110v = 4.55 amps."
"Ok, let's start with Amp-hoursverses Amps....
I think it's easer to understand if I give you some examples to work through.
For the sake of this explanation lets say you have a 12 volt compressor motor fridge, and this fridge draws 5 amps while it's compressor motor is running, now if the compressor motor ran for a whole hour the fridge would have drawn 5 amps in total for that hour, or 5 amp hours (5Ah), and if it ran like this for 24 hours it would have drawn and consumed 120 Amp-hours in total, 5Ahx 24h = 120Ah. " " Wattsthat you say?
Ok some electrical appliances are rated in Wattsrather than Amps, but that's ok, it's easy to convert these Wattsto Amps.
You simply take the stated Watts, and divide that by the Voltageand this gives you the Ampsthat the item will draw
So lets say for example you have a 120 Watt light globe (like the type you find in some car spot lights) and divide this 120Wby the 12V that is used to power it and you end up with 10A at 12V.
This also works the other way around, if you have the amps and the voltage of an item and you want to know the Watts, simply multiply the amps by the voltage and you have the Watts.
So for example remember that water pump that was drawing 10A at 12V, well 10A x 12V = 120 Watts
Now this works for any Voltage, Wattsand Amps combination.
Like a 100Whousehold light globe at 240V = 0.41A.
So 2400Wroom heater at 240V = 10A, and this just happens to be the most you can draw out of a standard household power point, 10A or 2400W.
"The formula is Amps = watts / volts.
So your 400w lamp, plus 100w for the ballast totals 500w / 110v = 4.55 amps."
"Ok, let's start with Amp-hoursverses Amps....
I think it's easer to understand if I give you some examples to work through.
For the sake of this explanation lets say you have a 12 volt compressor motor fridge, and this fridge draws 5 amps while it's compressor motor is running, now if the compressor motor ran for a whole hour the fridge would have drawn 5 amps in total for that hour, or 5 amp hours (5Ah), and if it ran like this for 24 hours it would have drawn and consumed 120 Amp-hours in total, 5Ahx 24h = 120Ah. " " Wattsthat you say?
Ok some electrical appliances are rated in Wattsrather than Amps, but that's ok, it's easy to convert these Wattsto Amps.
You simply take the stated Watts, and divide that by the Voltageand this gives you the Ampsthat the item will draw
So lets say for example you have a 120 Watt light globe (like the type you find in some car spot lights) and divide this 120Wby the 12V that is used to power it and you end up with 10A at 12V.
This also works the other way around, if you have the amps and the voltage of an item and you want to know the Watts, simply multiply the amps by the voltage and you have the Watts.
So for example remember that water pump that was drawing 10A at 12V, well 10A x 12V = 120 Watts
Now this works for any Voltage, Wattsand Amps combination.
Like a 100Whousehold light globe at 240V = 0.41A.
So 2400Wroom heater at 240V = 10A, and this just happens to be the most you can draw out of a standard household power point, 10A or 2400W.
Inverters
When trying to work out how much power will be drawn from your batteries by an inverter, a very rough but easy calculation is for every 100Wat 240V, you can expect the inverter will draw about 10A at 12Vfrom your batteries, it really works out a bit less than this but it's close enough for doing quick calculation."
http://www.fridge-an...ar.net/amps.htm
http://www.fridge-an...ar.net/amps.htm