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ELECTROSTATIC HANDLING PRECAUTIONS
All electronic circuits may be damaged by static electricity. To minimize the likelihood of electrostatic damage, discharge yourself by touching a water faucet
or other electrical ground prior to handling the 1524 and avoid touching components on the circuit boards. The risk of electrostatic damage is highest when relative
humidity is below 40%.
BATTERY AND PV VOLTAGE
Nominal battery voltage and PV voltage are determined automatically. The battery is considered to be 12V if battery voltage following boot is less than
16V, or 24V if battery voltage is greater. If the battery is determined to be 24V all 12V voltage setpoints are doubled. PV voltage is also determined
automatically. If nominal PV voltage is changed following installation power must be momentarily removed to reboot the 3024 to reconfigure PV voltage.
SELECTING PV MODULES
Voltage, current and power produced by Photovoltaic (PV) modules fluctuate widely with operating conditions. As a result a set of test conditions
referred to as Standard Test Conditions (STC) are used to rate modules in a meaningful manner and accurately predict real world performance. STC
ratings are not maximum or optimal ratings. Conditions can be present where V
Code and our recommendations call for 1.25 derating of both V
Key PV module specifications;
P
Maximum power in watts (P
MAX
Voltage with module open circuit (typically ≈20 – 22V for 12V modules)
V
OC
Voltage where module produces Maximum Power (typically ≈17 – 18V for 12V modules)
V
MP
I
Current where module produces Maximum Power
MP
I
Current with module Short Circuit
SC
The 1524 will provide the best MPPT current boost performance if all PV modules are identical. If module types are mixed, do not put dissimilar
modules in series. Dissimilar modules in parallel should have V
their V
will tend to track as operating conditions change. If module types are very different consider using a separate charge controller for each module
MP
type to obtain the best MPPT current boost performance.
Select PV modules that do not exceed the maximum ratings shown below, and preferably produce at least 3A of I
Nominal
Automatic
Battery
Current Limit
Voltage
12V
20A*
12V
15A
12V
15A
24V
15A
AS SHIPPED FACTORY DEFAULT SETTINGS
The 1524 contains various user configurable settings all of which are preconfigured at the factory. Most installations require no
changes to these settings which are typically suitable for most lead-acid batteries including sealed lead-acid batteries such as
Gel and AGM. All software programmable settings require the IPN-ProRemote to change and are retained if power is lost or the
IPN-ProRemote is used as a setup tool only and removed.
Software programmable settings
• Charge mode .............................................. 3-stage
• Acceptance voltage .................................... 14.2/28.4V
• Float voltage ................................................ 13.2/26.4V
• Charge time ................................................ 2.0 hours
• Float Transition Current .............................. 1.5A/100 amp-hours
• Load control ON voltage ........................... 12.6/25.2V
• Load control OFF voltage ......................... 11.523.0V
DIP switch & jumper settings (All DIP's OFF, A2 open)
• Auxiliary Output mode ................................ Auxiliary battery charger
• Equalize ...................................................... Disabled
EQUALIZE ENABLE
If DIP switch #4 is turned OFF, equalization is completely disabled. If DIP switch #4 is turned ON prior to the application of battery power, automatic
equalization is enabled and the 1524 will perform automatic equalization after the set number of Auto Equalize Days has elapsed. If DIP switch #4 is turned
ON, after battery power is applied an automatic equalization cycle will begin immediately. Equalization can also be started and stopped from the IPN-
ProRemote if DIP switch #4 is ON.
and I
OC
= V
x I
)
MAX
MP
MP
values within ≈0.5V or better for 12V modules, and be of the same basic cell technology so
MP
Maximum
Maximum
PV Power @
PV
STC
Isc @ STC
270W
16A*
200W
8A
200W
6A
400W
12A
*
Current rating and current limit are 20A when charging a 12V battery from nominal 12V PV modules. If
PV V
OC
and I
approach 1.25 times STC ratings which is why National Electrical
OC
SC
. Yet in real world conditions I
SC
Maximum
Recommended range of V
PV
Nominal 12V PV
V
@ STC
OC
24.0V*
16.5 – 18.5V
5
45.6V
45.6V
5
45.6V
5
ever exceeds 30V (>12V nominal PV modules) current rating and current limit become 15A.
• Equalize voltage ....................................................... 15.2/30.4V
• Equalize time ............................................................ 2.0 hours
• Auto equalize days ................................................... 30 days
• Maximum voltage setpoint limit ................................ 15.5/31.0V
• Temperature compensation factor ........................... −5.00mV/°C/cell
• Dusk-to-Dawn lighting control ................................ Disabled
• IPN Network address ............................................... 0 (zero, IPN Master)
Installation and Operation Manual
is commonly only about 75 – 80% of I
MP
per 100 amp-hours of battery capacity.
MP
at STC
MP
Nominal 18V PV
5
24.8 – 27.8V
5
5
at STC.
MP
Nominal 24V PV
5
5
33.0 – 37.0V
33.0 – 37.0V
6
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