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Xantrex RV Series Inverter/Charger Owner’s Manual
10
Sealed Gel Cell
Another type of battery construction is the sealed gel cell. They don't use battery caps. The
electrolyte is in the form of a gel (instead of a liquid) that allows the batteries to be mounted in any
position without spilling. The advantages are no maintenance, long life (800 cycles claimed) and
low self-discharge. The disadvantage is high initial cost and the possibility of damage from
overcharging.
While there are many manufacturers of quality non-sealed batteries, there are only a few
manufacturers of suitable gel cells. Don’t confuse sealed batteries with maintenance-free
batteries—the latter is typically a standard liquid electrolyte-type battery without caps for adding
water. When the electrolyte gets low you replace the battery.
AGM (absorbed glass mat) batteries are similar to gel cells and may be used in inverter
applications.
Battery Care and Maintenance
If you have read the battery charger mode section of this manual, you already have a good idea of
the stages of battery charging that combine to promote fast charging and ensure long battery life.
Basically, there are five charger-related considerations to properly care for your batteries.
• Charge Rate: The maximum safe charge rate is related to the size and type of your batteries.
Standard vented lead acid batteries (with battery caps) can be charged at a high rate—equal
to their capacity. Small batteries may require a lower charge rate. Check with the battery
manufacturer. Using the optional RC7 remote control the CHARGE RATE setting may be
adjusted to control the charging rate as a percentage of available charger output.
• Bulk Voltage: This is the maximum voltage the batteries reach during the normal charging
process. Gel cell batteries are charged to 14.2 volts, while non-sealed batteries are charged
to 14.4 volts. Adjust the
BATTERY TYPE
setting to either gel cell or liquid lead.
• Float Voltage: The batteries experience less gassing if they are maintained at a lower
voltage than the voltage at which they are charged. The float voltage will automatically be
adjusted when the proper battery type has been selected.
• Temperature Compensation: Temperature affects the optimum voltage values for the bulk
and float charging stages. The temperature probe automatically fine-tunes these voltages for
you.
Typical BULK and FLOAT Setpoints for Common Battery Types (12 V System)
Battery Type Bulk Volts Float Volts
Gel Cell (sealed)
14.1 volts 13.5 volts
Lead Acid (non-sealed)
14.4 volts 13.4 volts
Monthly Maintenance
At the minimum, check the level of the electrolyte in each battery cell once a month. It should be
above the top of the plates but not completely full. Most batteries have a plastic cup that the
electrolyte should just touch when full. Don’t overfill the batteries or the electrolyte will spill out of
the batteries when they are being charged. Only refill the batteries with distilled water. “Spring”
water and regular tap water may have high levels of minerals, which can poison the battery
chemistry and reduce battery life.
- TABLE OF CONTENTS 2
- Notice of Copyright 4
- IMPORTANT SAFETY INSTRUCTIONS 6
- Personal Precautions 8
- Theory of Inverter Operation 9
- Battery Charger 11
- Charger Terminology 12
- Three Stage Battery Charging 12
- Indicator 13
- Batteries 14
- Selection of Battery Type 14
- Battery Care and Maintenance 15
- Battery Installation 16
- Battery Sizing 17
- Battery Hookup Configurations 18
- Installation 19
- AC Wiring 20
- DC Wiring 21
- RV Series 22
- Inverter 22
- Distribution Panel 22
- Stacking Inverters 23
- Operation 24
- Theory of Operation 24
- RC6 Remote Control 26
- RC7 Remote Control 27
- User Menu 28
- Meters Menu 29
- Setup Menu 29
- Battery Cable Connection 31
- Mobile Installation 33
- Troubleshooting Guide 34
- Applications 35
- RC7 Menu Map 39
- Technical Information 41
- Limited Warranty 42
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