Xantrex Technology Freedom 458 operation = DC amp hours, operation = DC amp hours, operation = DC amp hours, Typical Power Consumptlon, AMP-HOURCONSUMPTION FORMULAS

BATTERIES

To achieve 50% cycling you should								AMP-HOUR CONSUMPTION FORMULAS
calculate your amp-hour consumption
between charging cycles and use a battery									(AC amps x 10) x 1.1 x hours of
bank with twice that capacity**. Each AC
									operation = DC amp hours
appliance or tool has a rating plate on it and will
									(watts/ DC voltage) x 1.1 x hours of
be rated in either AC amps or watts or AC VA
(volt-amps) apparent power. To calculate amp-									operation = DC amp hours
hour consumption, use one of the formulas to									(AC VA/ DC voltage) x 1.1 x hours of
the right to calculate the DC amp-hour draw for
									operation = DC amp hours
a 12-volt system.
									DC voltage is 12, 24 or 32 depending on
Calculate the amp hours for every AC
												your system.
appliance or tool that will be operated on the
inverter. This will provide the total number of								In all formulas, 1.1 is the correction factor for
amp hours used between recharges. Size the												inverter efficiency.
battery bank using this number as a guideline.								Typical Power Consumptlon
A good rule to follow is to size the battery bank
a minimum of two times larger than the									The chart identifies typical power
total amp-hour load requirement. Plan on								consumption for common AC loads. Use it as
recharging when 50% discharged.								a guide when identifying your power
**Batteries are typically charged to 85% of full								requirements.
												Many electric motors have
charge when charging with alternators without three-
stage regulators.												momentary starting requirements
												well above their operational rating.
	Typical Power Consumption
												Start up watts are listed where
Appliance	Typical			Appliance Run Times / Amp Hours								appropriate. Individual styles and
	Wattage										brands of appliances may vary.
		5 Min.	15 Min.	30 Min.	1 Hr.	2 Hr.	3 Hr.		8 Hr.	24 Hr.
												If using the same battery
13" Color TV	50	.33	1	2	4	8	12		32	96
												bank for the inverter and other
19" Color TV	100	.66	2	4	8	16	24		64	192
												DC loads, be sure to consider
VCR	50	.33	1	2	4	8	12		32	96
												the power consumption of the
Lamp	100	.66	2	4	8	16	24		64	192
												DC loads when sizing the
Blender	300	2	6	12
												battery bank.
Laptop Computer	50	.33	1	2	4	8
Curling Iron	50	.33	1	2
3/8 Power Drill	500	3.3	10	20
Icemaker*	200			2.6	5.2	10.4	15.6		41.6	83.2
Coffee Maker	1000	6.6	20	40	80	160
3 cu' Refrigerator*	150			2	4	8	12		32	96
20 cu' Refrigerator*	750			21	42	84	126		336	672
Compact Microwave	750	5	15	30	60	120	180
Full Size Microwave	1500	10	30	60	120	240	360					NOTE Certain laser printers, breadmakers,
Vacuum	1100	7.3	22	44	88	176	264
												digital clocks and appliance/tool chargers

Number in each box represents the total Amp hours used (@ 12 volt DC) based on various continuous run times.		may not operate on modified sine wave.
14	*Note refrigeration is typically calculated using a 1/3-duty cyle.