Free English POWERTECH MP-3760 (01) PDF document. Download the PDF, use the online viewer, or browse the FAQs for easy troubleshooting.
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What are the main features of the POWERTECH MP-3760 Dual Battery Solar Controller?
The POWERTECH MP-3760 includes the following features:
Will charge 2 completely separate battery banks at the same time or even a single battery.
Works with 12V or 24V systems.
Highly efficient PWM (Pulse-width modulation) charging system.
Provides up to 10A charging current (Limited by size of your solar panels).
Electronic protection from over charging, short circuit, or accidental reverse battery connection.
What are the technical specifications of the POWERTECH MP-3760?
Max solar input voltage: 30V (12V system), 55V (24V system)
Battery input voltage range: 8-15V (12V system), 8-30V (24V system)
Max output current (both channels): 10A
Overnight self-consumption: 4mA
Dimensions: 153 x 76 x 37mm
What are the charging voltage parameters for different battery types on the POWERTECH MP-3760?
The following data is for 12V systems. For 24V systems, please use 2x the values listed.
| Description | Sealed battery | Gel battery | Flooded battery |
|---|---|---|---|
| Equalize charging voltage | 14.6V | — | 14.8V |
| Boost charging voltage | 14.4V | 14.2V | 14.6V |
| Float charging voltage | 13.8V | 13.8V | 13.8V |
Maximum solar voltage: 30V (12V System), 55V (24V System)
Battery voltage range: 8~15V
Boost time: 2 hours
Self-Consumption: 4mA at night, 10mA during charging
Remote connection: 8-pin RJ-45
Temp. compensation: -30mV/12V/℃
Terminals: 4mm²
Temperature: -35℃ to +55℃
Net weight: 250g
How do I set up and connect the POWERTECH MP-3760?
Connect the components in the sequence 1 to 6 as described below:
1 & 2. Connect with Battery #1.
3 & 4. Connect with Battery #2 (If used for single battery systems, skip steps 3 and 4).
5 & 6. Connect with the Solar Panel.
Warning: Incorrect connection of the battery can damage the regulator.
How do I enter the setting mode to change options on the POWERTECH MP-3760?
1. Press the Set button to begin the mode selection process.
2. Press Set to toggle through: Battery Type, Charge Priority, Charge Frequency.
3. Once the suitable mode is selected, press and hold the Set button for 5 seconds, until the LED and setting begin to flash, to change the setting for the selected mode.
4. Press the Set button to toggle through settings.
5. Once the desired setting is selected, leave the Set button for 5 seconds to save the setting and return to the mode select process.
6. Once all modes have been set, leave the Set button for 5 seconds and the mode select process will end.
How do I select the battery type on the POWERTECH MP-3760?
The 1st LED is for Battery Type. The settings correspond as follows:
| Setting | Battery type |
| 1 | Sealed battery |
| 2 | Gel battery |
| 3 | Flooded battery |
How do I set the charging priority on the POWERTECH MP-3760?
The 2nd LED is for Charging priority. You only set the percentage you want for Battery #1, and the controller will automatically calculate the percentage for Battery #2.
| Setting | Battery #1 charging | Battery #2 charging |
|---|---|---|
| 0 | 0% | 100% |
| 1 | 10% | 90% |
| 2 | 20% | 80% |
| 3 | 30% | 70% |
| 4 | 40% | 60% |
| 5 | 50% | 50% |
| 6 | 60% | 40% |
| 7 | 70% | 30% |
| 8 | 80% | 20% |
| 9 | 90% (pre-set) | 10% |
Note: During normal charging, the controller will divide the charging as per the settings. Once Battery #1 is fully charged, more charge will go to Battery #2. Once Battery #1 is in low voltage and the setting will automatically revert to priority setting. When the controller detects only Battery #1, all power will be sent to battery #1 automatically.
How do I set the charging frequency on the POWERTECH MP-3760?
The 3rd LED is for charging frequency.
| Setting | PWM Charging frequency |
|---|---|
| 0 | 25Hz (pre-set) |
| 1 | 50Hz |
| 2 | 100Hz |
What do the LED flash patterns indicate for troubleshooting on the POWERTECH MP-3760?
LED flash (multiple flashes per second): Short circuit; check the solar panel and battery to make sure they are connected properly.
LED flash (1 flash per second): Fully charged.
LED ON: Charging.
LED flash (1 flash every 3 seconds): Battery connected, no charge current.
LED OFF: No connection or over voltage.
Does the POWERTECH MP-3760 detect battery voltage automatically?
Yes, the Regulator automatically detects Battery voltage. Note that a 24V battery must have 24V solar panels and a 12V battery must have 12V panels.
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my powertech MP-3760 solar controller LED flashes once every 3 seconds in the shade. Is this normal?
On page 6 of this manual, it say TROUBLESHOOTING: 4. LED flash (1 flash every 3 seconds): Battery connected, no charge current.
That sounds like it would lineup with what you are asking when you say “in the shade”.