Xantrex Technology PROwatt 1000 Using Multiple Batteries, Two Batteries Connected In Parallel

Battery Types and Sizes

Using Multiple Batteries

As your power requirements increase, you may need to use more than one battery to obtain sufficient capacity. Read “Two Batteries Connected In Parallel” and “Two Separate Battery Banks” to determine whether two batteries or two battery banks are more appropriate for your applications.

Two Batteries Connected In Parallel

Two identical batteries can be connected positive (+) to positive (+) and negative (–) to negative (–) in a parallel system. A parallel system doubles capacity and maintains the voltage of a single battery.

Both Figure B-1and Figure B-2show batteries connected in parallel. Figure B-1shows a battery configuration suitable for normal loads; Figure B-2shows a configuration that is recommended for heavy loads.

CAUTION

Do not connect the following in parallel: batteries made by different manufacturers, different types of batteries, batteries that have different Ah ratings. Decreased battery life and improper charging will result.

FROM ALTERNATOR

OR CHARGER

		FUSE OR
		CIRCUIT
ALL	1	BREAKER
OFF	2	BATTERY
		SELECTOR
		SWITCH

TO DC

LOADS

			TO VEHICLE
			VEHICLE	GROUND TO
				VEHICLE
			STARTING	CHASSIS
			BATTERY
BATTERY ISOLATOR
		FUSE OR
		CIRCUIT
DEEP-CYCLE		BREAKER	DEEP-CYCLE
BATTERY			BATTERY
				GROUND TO
				VEHICLE
				CHASSIS
DEEP-CYCLE			DEEP-CYCLE
BATTERY			BATTERY
FUSE OR			FUSE OR
CIRCUIT			CIRCUIT
BREAKER			BREAKER
BATTERY	ALL	1
SELECTOR			PROwatt	1000
SWITCH	OFF	2
		GROUND TO
			VEHICLE
			CHASSIS

Figure B-1 Configuration for Normal Loads

B–6