SHS 200 MPPT

4. Solar panels

In this section:

4.1. General instruction

The solar panel should be put in direct sunlight, absolutely no part of it should be shaded, even partially. Ensure the panel is placed in a location where no shading will occur at any time during the day.

The solar panel should be cleaned regularly; the dust can have a significant impact on performance. It can be cleaned using a wet cloth or sponge.

The controller will operate only if the PV voltage exceeds the battery voltage (Vbat).

  • PV voltage must exceed Vbat + 2V for the controller to start.

  • Maximum open circuit PV voltage: 24V

All panels connected on the SHS 200 must be identic with the exact same specifications.

4.2. PV connection

The SHS 200 exists in two different versions: barrel and MC4 connectors. The difference stands in the connectors used to plug PV panels. The SHS with barrel connectors is easier to install and more suitable for smaller PV arrays. The SHS with MC4 connectors enables to use of a larger range of PV panels which is useful for more powerful configurations.

Barrel connectors

MC4 connectors

Advantage

Easy plug-and-play PV connections.

Flexible choice of PV panels

Inconvenient

Limited combinations of PV panels.

Require additional wiring know-how.

Possible PV panels combinations:

36-cells panels in parallel*

SHS 200 models

(20 to 50 Wp)

(55 to 65 Wp)

(70 to 100 Wp)

(105 to 200 Wp)

Barrel connectors

1 to 4

n/a

n/a

n/a

MC4 connectors

1 to 4

1 to 3

1 or 2

1

*No series connection allowed

4.2.1. Model with barrel PV connectors

The product includes 4 PV inputs (5.5mmx2.1mm barrel connectors). Each input can be connected to one solar panel comprising of 36 cells in series (“12V panel”) and with a maximum short-circuit current (Isc) of 5A. The overall total peak power installed on the SHS must not exceed 200Wp (watts peak).

model with barrel PV connectors

4.2.2. Model with MC4 PV connectors

The product includes a positive and a negative extension cable (25 cm length - 14 AWG section). The negative cable is terminated by a female MC4 connector. The positive cable is terminated by a male MC4 connector. It allows a correct connection with PV modules that generally have the female MC4 connector on the positive cable (male on the negative). Any combination of 36-cells panels connected in parallel with an overall total peak power of 200Wp (watts peak) or less can be installed on the PV terminals (e.g., 2 x 90Wp, 1 x 200Wp). It is recommended to use MC4 splitter connectors (also called Y or W connectors) to connect panels in parallel.

model with MC4 PV connectors

4.3. Sizing examples

The table below gives some examples of suitable PV panels and battery combinations for the SHS 200. Daily energy production is calculated for an average daily irradiation of 5000Wh/m²/d. Local conditions (solar irradiations and temperature) should be considered for proper system sizing. Lower solar irradiations result in bigger PV power and battery capacity requirements to supply the same energy demand. Higher temperatures result in lower PV panels efficiency.

Configuration

PV power

Daily production [1]

Battery voltage

Recommended battery

Capacity

Autonomy [2]

#

Wp

Wh/day

V

Ah @12V

Wh

SHS 200 #1

50

200

12

30

180

SHS 200 #2

100

400

12

60

360

SHS 200 #3

150

600

12

90

540

SHS 200 #4

200

800

12

120

720

Note

  • [1] Daily energy available with an average solar irradiation of 5000 kWh/m²/d, and an average system efficiency of 80%.

  • [2] Net storage autonomy with a maximum depth of discharge at 50%.