solar charge

Install a solar charge controller

Regulator installation

The charge regulator performs several functions:

Regulation of the battery charge by limiting the voltage to avoid overloads.
Limitation of the discharge by load shedding of the use, to avoid too deep discharges which risk damaging the battery.
System operation control by indicator light or LCD display.

It must be installed as close as possible to the battery to limit the length of the cables and therefore the loss of energy.

It is preferable to choose a location that is frost-free, dry and ventilated.

Refer to the manufacturer’s instructions.


The choice of cable is essential for the correct functioning of the system. An insufficient cable section will cause a great loss of energy.

The sizing of the cable is defined by the current and voltage flowing through it as well as by its length.

To calculate the correct cross-section, refer to the sizing table.

On all PWM or MPPT regulator models, it is important to connect the battery first and then switch it on without any other connection so that the device identifies the system voltage (12V, 24V, 36V or 48V) .
In addition, for regulators equipped with an output for supplying consumers (load output in 12, 24 or 48 V), it is strongly recommended not to connect an inverter or a direct pump to it. The risk is to damage the regulator.

Check the polarity of the cables before each connection using a tester (multimeter) or by marking the cables with tape for example. The common colors being red for (+) and blue for (-).

Safety instructions

In most cases, the flexible cable will be preferred (fine multi-strands), so make sure that all the cable strands are properly tucked into the connection terminal block. If any strands are crushed, bent or come out, start the connection again.

Do not cut strands on a cable to reduce the section. If the cable is too big for the terminal block, it should be replaced with a lower section. The maximum section tolerated by the regulator is indicated on the technical sheet.

The risks associated with wires protruding from the terminal block or with a bad connection are:

The short circuit, fire, burn, ….

Practical advice

Protect all the inputs and outputs of the regulator with individual protections such as circuit breakers or fuse with a suitable rating.


The regulator does not require any special maintenance.

However, to ensure proper operation, it is advisable to carry out some periodic checks:

Check the connections, (tightening, absence of corrosion)
Check the general condition of the cables and their supports.

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