The SolarMax P-Battery is an upgrade kit that allows existing solar PV systems to be paired with a battery storage system, improving energy self-sufficiency. The battery stores solar energy generated during the day to power homes in the evening or at night. This can increase self-consumption of solar energy to 70-80%. Pairing with heating or hot water systems allows for further efficiency. The battery system also helps smooth out energy fed into the grid by storing excess solar energy produced during peaks.

1. SolarMax P-Battery
The solution for more self-sufficiency

2. The value of foresight
Independence from rising electricity prices is becoming increasingly
important. By using a battery, solar PV plant operators come significantly
closer to achieving this goal. All owners of a SolarMax P series inverter
are “battery-ready” and can benefit from the new P-Battery upgrade kit.
Both new and existing PV installations can be easily enhanced by a
battery system. The solar energy generated during the day is stored and
used at low-irradiation times such as in the evening or at night. Coupling
with heating or hot water systems can further increase self-consumption
up to 70 - 80%. The impact on the public grid is also positive, as generation
peaks are effectively smoothed out by storing electricity in this way.
“Consistently increasing electricity
prices creates uncertainty for our
household budget. Self-consumption
from PV provides an effective alternative
for our family. For this, SolarMax offers
the ideal solution.”

3. Retrofitable
Regardless of whether it is a new or existing plant.
The upgrade kit is compatible with all device types
of the P series and can be installed on site by an
electrically skilled person.
Maximum self-consumption
The inverter can be configured in such a way that it
charges the battery as quickly as possible. No
backup for storing a generation peak is designed.
The household consumption is covered entirely
through PV energy.
Variable electricity tariffs
In the event of electricity tariffs varying over the
course of the day, the inverter may be configured
in such a way that it only discharges the battery
during high-tariff periods.
The integrated energy management system (EMS) enables
the optimum self-consumption for individual applications.
5.000
3.500
2.500
1.250
0
03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Natürlicher
Eigenverbrauch
Speicherung Eigenverbrauch
aus Speicher
Netzeinspeisung Verbrauch
PowerinW
Time
Natural self-
consumption
Battery
charge
Self-consumption
from battery
Grid export Grid import
PowerinW
Time
READY
Control included
The upgrade kit includes an energy management
system (EMS). This system can be used to
individually configure and optimize energy flows
within the household.
Limited feed-in
(peak-shaving)
The maximum output to be fed into the grid
can be defined, e.g. 60% of the inverter output.
The remaining energy is stored in the battery or
consumed directly.
5.000
3.500
2.500
1.250
0
03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Natürlicher
Eigenverbrauch
Speicherung Eigenverbrauch
aus Speicher
PV-Erzeugung Verbrauch
PowerinW
Time
5.000
3.500
2.500
1.250
0
03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Natürlicher
Eigenverbrauch
Speicherung Eigenverbrauch
aus Speicher
PV-Erzeugung Verbrauch
Off-peak priceOn-peak priceOff-peak price

4. Specifications
P-Battery upgrade kit
Input/
output values
Rated output power 4,000W
Maximum output 5,000W
Maximum current 30A
Minimum DC voltage 130V
Maximum DC voltage 350V
Connections DC+, DC-
Connection type Wieland PST40i1 (identical to MC4)
Efficiency Max. efficiency 98.0%
Ambient conditions
Protection class IP 54
Ambient temperature range (for rated power output) -20°C … +60°C (+45°C)
Relative humidity 0 ... 98% (no condensation)
Maximum operating level above sea level 2,000m
Fire protection class UL94 V0
Configuration Topology bidirectional DC/DC converter
Cooling concept natural convection
Energy management system (EMS) integrated
Casing Aluminum
Standards & guidelines EMC 2)
EN 61000-3-2 / EN 61000-3-3 / EN 61000-3-11 / EN 61000-3-12 / EN 61000-6-2 / EN 61000-6-3
Device safety 2)
IEC / EN 62109-1/ -2
Data communication Connection type M12 (5-pole)
Interface CANopen (CiA 418/419)
Weight and
dimensions
Weight 5kg
Dimensions (W x H x D) 530 x 360 x 70 mm
Warranty Standard warranty 5 years
Energy storage
Battery Capacity / usable capacity 7.2kWh / 5.8kWh
Depth of discharge (DoD) 80%
Maximum charging output 4,000W
Number of full cycles 2,500
Service life cycles 15 years
Technology LiFePo4 (lithium iron phosphate)
Battery management system Single-cell monitoring
Fuse connection 2 x 40A
DC disconnector integrated
Connections DC+, DC-
Efficiency Charging/discharging efficiency > 95%
Ambient conditions Protection class IP 20
Ambient temperature range (for rated power output) 0°C … +40°C
Relative humidity 0…70% (no condensation)
Standards & guidelines Transport UN 38.3
Data communication Connection type M12 (5-pole)
Interface CANopen (CiA 418/419)
Weight and
dimensions
Weight 140kg
Dimensions (W x H x D) 600 x 1200 x 300 mm
Warranty Fair value compensation warranty 5 years 1)
1)
7 years when using the KfW credit program 275 All rights, amendments, and errors reserved.
2)
when installed
90000398
2013/06en