Installation Guide

 In the case of not very low irradiance, if the voltage across the

terminals differs from the rated value by more than 5 percent, this

indicates a bad electrical connection.

6.2 Maintenance

Renogy recommends the following maintenance in order to ensure

optimum performance of the module:

 Clean the glass surface of the module as necessary. Always use

water and a soft sponge or cloth for cleaning. A mild, non-abrasive

cleaning agent can be used to remove stubborn dirt.

 Check the electrical and mechanical connections every six months to

verify that they are clean, secure and undamaged.

 If any problem arises, have them investigated by a competent

specialist. Observe the maintenance instructions for all components

used in the system, such as support frames, charging regulators,

inverters, batteries, etc.

6.3 Replacing Bypass Diodes

Removing the bypass diodes should be done only by a competent PV

technician and after the module has been disconnected from the system.

 Place module face down on a soft, flat surface Insert a 3mm flat

screwdriver into the slot on the junction box cover. (The cover has a

sign of screwdriver). Gently pull up the four slots until the cover been

opened.

 Insert the 3mm flat screwdriver into a hole alongside of diode and

near one mounting hole of the diode, pry the screwdriver in the

opposite direction of diode and gently pull the diode up until the lead

comes free. Do the same in the other mounting hole of the diode, and

repeat until the diode is free.

 Note the orientations of the polarity markings on the diodes.

 Check the resistance of the diodes by using the digital multimeter’s

ohms scale. Resistance should be low in one direction, then when

leads are reversed on the diode’s terminals the resistance should be

high, as illustrated in the two pictures below. If a diode has a low

resistance in both directions, it is probably shorted. If it has high

resistance in both directions it is probably open. In either case it

should be replaced.

 Replace a defective diode with a diode of the same type, and ensure

that its polarity making is oriented the same way as the original diode.

 Finally, check the open-circuit voltage (Voc) of the module, as

described previously, and replace both covers.