Xantrex Technology PROwatt 1000 manual Battery Size

Battery Size

Battery Size

	CAUTION
	The PROwatt 1000 must only be connected to batteries with a
	nominal output voltage of 12 volts. The inverter will not operate from
	a 6 volt battery and will be damaged if connected to a 24 volt battery.
Importance	Battery size or capacity is as important as the battery type for efficient
	operation of your loads. Xantrex recommends that you purchase as much
	battery capacity as possible.
Battery	A number of different standards are used to rate battery energy storage
Capacity	capacity. Automotive and marine starting batteries are normally rated in
Standards	cranking amps. This is not a relevant rating for continuous loads like an
	inverter. Deep-cycle batteries use a more suitable rating system, either
	“amp-hours” (“Ah”) or “reserve capacity” in minutes.
	Battery Reserve Capacity Battery reserve capacity is a measure of
	how long a battery can deliver a certain amount of current—usually 25
	amps. For example, a battery with a reserve capacity of 180 minutes can
	deliver 25 amps for 180 minutes before it is completely discharged.
	Amp-hour (Ah) Capacity Amp-hour capacity is a measure of how
	many amps a battery can deliver for a specified length of time—usually
	20 hours. For example, a typical marine or RV battery rated for 100 Ah
	can deliver 5 amps for 20 hours (5 A x 20 hours = 100 Ah).
	This same battery can deliver a higher or lower current for less or more
	time, limited approximately by the 100 Ah figure (for example, 50 A for 2
	hours, or 200 A for 1/2 hour), but usually the capacity figure given is only
	accurate at the specified rate (20 hours).
	To calculate the battery capacity you require, read “Estimating Battery
	Requirements” on page B–4 and “Battery Sizing Example” on page B–4,
	and then complete the “Battery Sizing Worksheet” on page B–5.

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