Operation and Programming of the A30 Voltage Controller and Similar Devices for Turbines and Solar

[@ronrover6594]

Sorry for this sort of a beginner's question: I'm trying to automatically dump excess energy from my solar panels into a 48V water heater once the battery is full (or at least at 80%). I learned that this relay/controller can do that. I just don't understand where the connection of the controller should be attached. I see people on KZbin fixing it to the battery, others put it on their hybrid inverter/charge controller. I don't seem to understand that concept. I learned that the cables from the charger to the battery must be thick due to the heavy amperage and now here comes this tiny accessory with cables 10-15% of the battery cables in size and handles it well. Can you please explain where my understanding starts to get wobbly? English is not my first language ... I hope you understand my question. THX!

[@indikadeshapriya3029]

4.Function: 1>.Set method: 1.1>.Screen display ‘U-3’ and enter setting mode automatically after power ON. 1.2>.The default initial display mode is P-0 which has no function. 1.3>.Press SET button to switch work mode: P-1 to P-4. 1.4>.Then press ENTER button to set parameter value after selected mode. 1.5>.Then press SET button select the next parameter and set value. 1.6>.It means that the setting is completed and the parameters are saved when no bit flashes. 1.7>.Keep press ENTER button more than 3second enter into set mode at normal display status. 1.8>.Reset:Press 2 buttons at the same time, then turn on the power. it means the reset is successful if it displays ‘rst’, and all parameters are restored to factory settings. 1.9>.Set Mode:One bit of screen will flash at set mode. 1.10>.Work Mode: No any bit flashes. 1.11>.Press ENTER button to start or stop delay at work mode. 2>.P-1 work mode: Delay timer. 2.1>.This mode needs to set 3 parameters: T1, T2, d. 2.2>.Function: After trigger, relay keep OFF for time T1 and then keep ON for time T2 and then turn OFF and keep. 2.3>.T1: Set keep OFF time and set range is 000-999 second. 2.4>.T2: Set keep ON time and set range is 000-999 second. 2.5>.d: Set keep ON time and set range is d-0 to d-9. 2.6>.If T1 is set to 005 and T2 is set to 000, it means: after trigger, relay keep OFF for 5 second and then turn ON and keep. Trigger->OFF for 5s->ON. 2.7>.If T1 is set to 000 and T2 is set to 005, it means: after trigger, relay keep ON for 5 second and then turn OFF and keep. Trigger->ON for 5s->OFF. 2.8>.If T1 is set to 005 and T2 is set to 006, it means: after trigger, relay keep OFF for 5 second and then keep ON for 6 second and then turn OFF and keep. Trigger->OFF for 5s->ON for 6s->OFF. 2.9>.d-0 means display screen always keep ON. d-5 means display screen will turn OFF after 5 minute.Press any button to turn on the display again. 3>.P-2 work mode:Voltage monitor(default OFF) 3.1>.This mode needs to set 5 parameters: uL, nL, cV, dL, H/L. 3.2>.Function: Relay turn ON(or OFF) if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF(or ON) if the measured voltage is less than the lower limit voltage value nL. 3.3>.uL: Upper limit voltage value. 3.4>.nL: Lower limit voltage value. uL can not be the same to nL. 3.5>.cV: Measured voltage calibration value. Its range is -0.5V~0.5V. 3.6>.dL: Sampling time interval of the measured voltage. Its range is 0.1s~0.9s. 3.7>.H/L: ‘ON H’ relay turn ON if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF if the measured voltage is less than the lower limit voltage value nL. ‘ON L’ relay turn OFF if the measured voltage is higher than the upper limit voltage value uL and relay turn ON if the measured voltage is less than the lower limit voltage value nL. 3.8>.P-2 mode can use the delay time T1 and T2 set in P-1 mode. 3.9>.E.g. P-1 : T1 000 T2 000 and P-2 ‘ON H’ : relay turn ON if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF if the measured voltage is less than the lower limit voltage value nL. 3.10>.E.g. P-1 : T1 003 T2 000 and P-2 ‘ON H’ : relay turn ON if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF after 3 second if the measured voltage is less than the lower limit voltage value nL. 3.11>.E.g. P-1 : T1 003 T2 000 and P-2 ‘ON L’ : relay turn OFF if the measured voltage is higher than the upper limit voltage value uL and relay turn ON after 3 second if the measured voltage is less than the lower limit voltage value nL. 3.12.E.g. P-1 : T1 003 T2 002 and P-2 ‘ON H’ : relay turn ON after if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF after 3 second if the measured voltage is less than the lower limit voltage value nL. 4>.P-3 work mode:Voltage monitor(default ON) 4.1>.This mode needs to set 5 parameters: uL, nL, cV, dL, H/L. The setting parameters of A and B are the same.The difference between them is that the default state is different. 4.2>.H/L: ‘ON H’ relay turn OFF if the measured voltage is higher than the upper limit voltage value uL and relay turn ON if the measured voltage is less than the lower limit voltage value nL. ‘ON L’ relay turn ON if the measured voltage is higher than the upper limit voltage value uL and relay turn OFF if the measured voltage is less than the lower limit voltage value nL. 4.3>.E.g. P-1 : T1 000 T2 003 and P-2 ‘ON L’ : relay turn ON if the measured voltage is less than the lower limit voltage value nL and then relay turn OFF after 3 second. 5>.P-4 work mode:overvoltage and undervoltage monitor. 5.1>.This mode needs to set 5 parameters: uL, nL, cV, dL, H/L. The setting parameters of A and B are the same. 5.2>.Function:’ON H’ relay turn ON if the measured voltage between the upper limit voltage value uL and the lower limit voltage value nL. Otherwise turn OFF relay. 5.3>.Function:’ON L’ relay turn OFF if the measured voltage between the upper limit voltage value uL and the lower limit voltage value nL. Otherwise turn ON relay. 5.4>.E.g. P-1 : T1 003 T2 000 and P-4 ‘ON L’ : relay turn ON after delay time 3 second if the measured voltage is outside the range of uL and nL. 5.5>.E.g. P-1 : T1 000 T2 003 and P-4 ‘ON H’ : relay turn OFF after delay time 3 second if the measured voltage is outside the range of uL and nL.

[@philipchantry01]

Hi I want to program the relay to switch off at 24.2v and remain off for 15 minutes to give the batteries time to charge back up. Do I set T1 or T2 to 999?

[@rogerbarton1790]

How do you determine which of the work modes (P2, P3 or P4) you actually use?

[@jwsolarusa]

Thanks for sharing this valuable information and have a bless day

[@SinKillerJ]

That display looks like a bad solder joint. I'd try wicking it off and applying some good quality solder to it. Should be fairly easy, those indicators don't tend to have the pins close together.

[@ToysforWatts]

They're not soldered, it's a pin connection.

[@SinKillerJ]

@@ToysforWatts Oh wow that's an odd way of doing that but guess it was the easiest way to tool the line.

[@erikvanlangen6451]

Hi. Sorry for bothering again. A few videos ago I sended a response as well about these controllers. Now with this close-up I am sure we are talking about the same controller. The connections you use on the controller can also be used to control an AC load. (as long as you stay below 30 Amps. It is still "China-quality", so maybe not use 30A :p) You can see this on the blue relay inside the controller as wel ("30A 240VAC") I did this as well with almost the same device (I do have the upgraded version, which has a few more menu options such as delays). I did put the controller on the live wire into my grid-tie inverter. And till now it is working perfect. By connecting it this way, you eliminate the frustrating fotek relais, which are inefficient because they are creating heat. About your question for the settings. These are the settings: [Upper limit] - [Lower limit] - [Correction value] - [Display off time (in minutes)] - [Above upper limit / Below lower limit]

[@ToysforWatts]

I would be interested in seeing a picture of how you have the it all connected to your terminals. These relays seem to share a ground between the switching and load circuits, I don't think I would be able to isolate one from the other. I guess I need to look at the backside of the board.

[@erikvanlangen6451]

@@ToysforWatts I did send you an email with my setup. Hopefully you can use it :). If you have some feedback or ideas for me to improve my system, please let me know!

[@Parafiestas]

Thanks for the info man!

[@Qaz375]

They do a U3 U1 and V1 but I think they are all the same specs

[@donaldsteele6276]

Nice bro I love it

[@tommiritakorpi671]

Have you considered adding a simple voltage divider to drive the braking relays? I suppose the drive current is very small and some 10kohm 33kohm divider should work just fine.

[@rogerbarton1790]

I'm not familiar with these particular relays, but if they're conventional types (with a coil) you could put a resistor in series with EACH relay coil, if you drive them all through one resistive dropper or divider the voltage drop will increase as more relays are called, this could result in relays dropping out. You need to know how much current the relay coil takes, what its operating voltage is and what the voltage is that energises the relay, the required resistance R (ohms) = V/I where V (volts)is the voltage drop required and I (amps) is the current.

[@lorussogardens6861]

I have a question on connecting the controller and ssr. The Chinese controller did not come with any instructions. Do you have any videos that show you installing the controller?

[@ToysforWatts]

Is it the exact same A30 controller?

[@lorussogardens6861]

@@ToysforWatts yes same controller for 24v

[@lorussogardens6861]

I was able to get it working without the ssr but can't get it to work with the ssr. What is the point of the ssr? Is it for safety?