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Installation, commissioning and operating instructions for valve-regulated stationary lead-acid batteries
7140203153 V1.4 (09.2018)
Installation, commissioning and operating instructions for valve-regulated stationary lead-acid batteries
7140203153 V1.4 (09.2018)
7.5 Remarks to warranty management
Above mentioned information about battery performance and service life, particularly concerning the charging
procedure and the influence of temperature and cycling, affect terms of warranty as well.
In case of a warranty claim the customer/battery operator needs to prove the compliance of above mentioned
parameters with the allowed/recommended limits. Corresponding measurement logs have to be sent to the
battery manufacturer.
The service life of the battery is valid for operation under optimal conditions only.
For a better understanding of the life time terms, please pay attention to the information leaflet No. 23e
(Edition August 2013) of the Fachverband Batterien of the ZVEI – Zentralverband Elektrotechnik und Elektro-
industrie (https://www.zvei.org/fileadmin/user_upload/Verband/Fachverbaende/Batterien/Merkblaetter/
Industriebatterien/23e_Definition_of_different_life_time_terms_for_batteries_2013-08.pdf). With regard to the
assertion of warranty claims only the respective contractual provisions are decisive.
For special demanding operational conditions as well as for solar and off-grid applications the expected battery
service lifetime is heavily influenced by above mentioned operational conditions. In order to decide whether a
battery failure was caused by manufacturing defects or operational conditions, above mentioned parameters
need to be monitored and registered on a regular basis. These data have to be forwarded to the manufacturer
for further analysis.
HOPPECKE recommends the usage of a battery monitoring system for monitoring and logging of critical data.
Please contact your local HOPPECKE representative for information on HOPPECKE battery monitoring equipment
and accessories.
The following figure depicts dependency of the endurance in cycles on depth of discharge and temperature.
Fig. 7–10: Endurance in cycles of
sun
| power
VR L
(
OPzV solar.power) depending on DoD and temperature
7.4.3 Electrolyte freezing point depending on depth of discharge (DoD)
The freezing point of the electrolyte (sulfuric acid) rises with increasing depth of discharge.
In case the battery is exposed to cold ambient temperatures (< 0 °C) the maximum depth of discharge has to
be decreased in order to avoid electrolyte freezing and potential damages of the cell jar.
Fig. 7–11
shows an
example for this relation. Example: If depth of discharge is below 60 % the operating temperature must not be
below -23.4 °C.
Fig. 7–11: Electrolyte freezing point as a function of depth of discharge (DoD)
Cycle numbe [n]
Depth of Discharge (DoD) in %
Freezing Point in °C
Depth of Discharge (DoD)
sun
| power
VR L
at 20 °C
sun
| power
VR L
at 40 °C
sun
| power
VR L
at 25 °C
sun
| power
VR L
at 45 °C
sun
| power
VR L
at 30 °C
sun
| power
VR L
at 35 °C
8 Battery maintenance
Danger!
Work on batteries, especially installation and maintenance should be performed by
HOPPECKE specialists (or by qualified personnel trained by HOPPECKE) only; personnel must be
familiar with battery handling and the required precautionary measures. Unauthorized persons
must keep away from the batteries
To ensure the reliability and longevity of your battery system, regular maintenance is required.
Document the type and scope of maintenance work performed as thoroughly as possible. These
records can be very helpful if troubleshooting is required and are a prerequisite for making war-
ranty claims.
8.1 Work to be performed every six months
Take the following measurements and record the measurement values:
1. Voltage of the complete battery system.
2. Individual voltage of selected cells or monobloc batteries.
3. Surface temperature of selected cells or monobloc batteries.
4. Temperature in battery room.
If the cell voltage deviates from the average float charge voltage by more than +0.2 V/cell or
-0.1 V/cell and/or if the surface temperature of various cells or monobloc batteries differs by
more than 5 K, contact customer service.
Also note specifics of lead-acid batteries with electrolytes, fixed in gel.
(see chapter 6.2.5)
