mppt_pv_short_relay_reset
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mppt_pv_short_relay_reset [2022-12-21 11:40] – ↷ Page moved from drafts:mppt_pv_short_relay_reset to mppt_pv_short_relay_reset mvader | mppt_pv_short_relay_reset [2024-09-26 09:01] (current) – [Reset latching relay] mvader | ||
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====== MPPT Solar Charger PV Short Relay Reset ====== | ====== MPPT Solar Charger PV Short Relay Reset ====== | ||
- | Most of the Solar Chargers that support 150V or more have a protection mechanism | + | This document explains how to perform |
- | + | ||
- | In some newer models (see list below) | + | |
The protection consists of a latching relay, which is mounted across the PV Input. When the firmware detects a short between PV inputs and Battery outputs, by monitoring the battery voltage for an over voltage, it engages the relay and as such shorts the PV Input. See errors 80 to 83 descriptions [[: | The protection consists of a latching relay, which is mounted across the PV Input. When the firmware detects a short between PV inputs and Battery outputs, by monitoring the battery voltage for an over voltage, it engages the relay and as such shorts the PV Input. See errors 80 to 83 descriptions [[: | ||
- | List of Models | + | List of models |
- | * SmartSolar VE.Can MPPT 250/100 - serial | + | |
+ | * SmartSolar VE.Can MPPT 250/100 - Pv Short Relay introduced per Serial | ||
+ | |||
+ | ==== When to perform this procedure? ==== | ||
+ | |||
+ | Applying a higher battery voltage than configured in the Solar Charger (eg. 48V battery to a 12, 24 or 36V configured charger), and then connecting the PV Array, can cause the protection to “mistrigger”. Meaning that the charger sees an over voltage, and as such assumes that there is an internal fault and then engages the latching protection. | ||
+ | |||
+ | Recovering from such mistriggers is the purpose of the here documented reset feature. | ||
- | ==== Reset latching relay ==== | + | Follow below procedure only if (a) the charger is not measuring any PV voltage when it should (i.e. during the day, with sun shinning, and all connections are ok). (b) the charger no longer charges the battery and measuring the PV Input with a MultiMeter in resistance mode shows a few Ohms or lower. (c ) the charger no longer charges an error 80 to 87 is/was shown. |
+ | ==== Reset procedure | ||
To recover from such failure, the below reset procedure must be followed. | To recover from such failure, the below reset procedure must be followed. | ||
- | - Power the solar charger through its battery terminals with a 12V battery or bench power supply set to 12V. | + | |
- | - Leave the PV Input terminals disconnected. | + | |
- | - Open VictronConnect and navigate to the Product settings menu. There the PV Short reset feature is shown.{{ : | + | - Make sure no error 80 to 83 is active. If it is active, power cycle the unit. |
+ | - Open VictronConnect and navigate to the Product settings menu. There the PV Short reset feature is shown.{{ : | ||
- Then click the RESET button. It will gray out for a few seconds and return blue. A click might be heard. | - Then click the RESET button. It will gray out for a few seconds and return blue. A click might be heard. | ||
For the SmartSolar VE.Can MPPT 250/100 with a serial number between HQ2150 and HQ2250, the reset procedure – unfortunately – often does not work. In this case, contact your dealer for replacing the MPPT under warranty. | For the SmartSolar VE.Can MPPT 250/100 with a serial number between HQ2150 and HQ2250, the reset procedure – unfortunately – often does not work. In this case, contact your dealer for replacing the MPPT under warranty. |
mppt_pv_short_relay_reset.1671619230.txt.gz · Last modified: 2022-12-21 11:40 by mvader