NRG USER MANUAL
SymphoniePLUS3 User Guide
SymphoniePLUS3_DataLogger_Manual
Rev. 17
support@nrgsystems.com | Page 58
31 December 2018
Recharging the iPack Battery
Under normal use, the iPack battery will maintain adequate charge when connected to a 15 Watt, 12 V
DC photovoltaic (PV) panel. The iPack battery must be fully charged before field installation.
To charge with a source other than a PV panel, connect a regulated and fused 15 V DC source to the PV
input of the iPack. The iPack’s charging circuit will draw a maximum of 750 mA (earlier iPacks will draw a
maximum of 500 mA). A completely discharged battery can be recharged in about 6 hours with such an
adapter. An iPack charger is available from NRG Systems (item #3615).
After completing tests, you may want to pre-assemble the logger and iPack in the logger’s shelter box.
This can simplify the transport of the equipment and save time. See the Field Installation chapter for
detailed instructions.
The iPack has two sets of terminals. When recharging the iPack battery, you MUST use the PV terminals;
do not use the 12 V external battery terminals. For more information about these terminals, see the
following sections regarding connecting a PV panel to the iPack.