verry informative. thanks for the video. can the shutting down issue be improved with lower voltage on the input side (panels in parallel) thus giving a bigger difference in input vs output side?
Looking great, and really good power numbers off your panels as well. Those Boost MPPT converters seen finicky but when you have a specific application there is not much avaliable.
Mike ive been concidering one of these devices for use as a 72 volt ebike charger the use at home from a 12 volt adjustable current power supply and when bike camping from 4 flexable 50 watt panels in best config thats specified whats your thoughts on the reliablity of these as relieability is the main requirement ,otherwise i was going to make more of solid sate design with adjust volt ,current and low volt cut out via a few 10k pots on the front using a 20,30 or 40 amp dc to dc module they have on ebay, any advice for someone not experienced with dc boost units ?Thanks Katie
I was looking for why my controller drops out ever 20 seconds or so. Saw you mention the panel voltage being set too low being a possibility. Will have to try changing that value tomorrow and see if it helps. Thanks!
I have 2 solars on the roof of my motorhome Kyocera 2x120W KC 120-1 Details Maximum Power 120 W Maximum Power Voltage 16.9 V Maximum Power Current 7.1 A Open Circuit Voltage 21.5 V Short Circuit Current 7.45 A and the MPPT controller that loads two batteries from these two panels in series to give a 12V output. Can I use this controller to recharge these batteries. What voltage should I set for charging?
If you open those chargers, a cheap computer case with slots for 120mm fans would give you something to mount those controllers too (motherboard tray), a quieter fan (or fans) and a panel you could mount the fronts (displays) too that you could just pass the wires through. You could also have buss bars inside it to protect them instead of having that out on the board and risk (even slightly) a short.
There is a fan speed setting: while not in charging mode 1. long press on "up arrow" 2. short press "set" 3. adjust fan speed with the up and down arrow to adjust. 4. End by hitting the "ok" sounds like an air raid in the garage.😊
Interesting you could get 5A charging current boosting from 60V to 80V -- I tried the same setup on my unit and only got max of 2.5A! What a strange device. I just wrote a blog post trying to map out the charging current ability vs input/output voltage.
help. i hooked this to the 12 v dc [ 10 amp.],output of my 1500/2000 watt generator, but it's showing 22- 23 - even as high as 30 volt peaks.it's jumpy. what should i set the input voltage and amps for? i'm charging lead acid deep cells .[4 x 12 v, [110 Ah ], = 24 v, [220 Ah ]. what should the output be set for? 27 v ?. i could use your advise.
these units are booster only as they drop the true solar panel voltage down to close to battery voltage and then boost voltage up. Do these auto start every morning when the sun comes up? or do you have to manually turn on? blimey 3 are noisy.. unplug the fans and drill the top and bottom full of big holes for air flow.?
Hmm no they dont, They are a micro controller based boost converter, Which finds the MPPT voltage of the panels "which is lower "and then boosts that up to the output which is the battery voltage. Yes there is a setting to auto turn on, Its always worked. haha Yes very noisy small fan but apart from the noise they do work, If anything replacing the fan with a bigger slow turning one would be best but yes it needs a fan as it has a small heatsink on the mosfet. Given the size of the case.
Hello, Why I can't get more charge power than 150W on the mpt-7210a regulator? In full sun, I connect 4x230W solar panels in parallel mpp = 29V Open circuit 40V. The rechargeable batteries are 48V 40Ah. The parameters set in the controller are 55V charging voltage and 10A charging current and mppt set to 29V. The regulator shows the voltage on the PV during charging 35V and the battery charging current 3A and the voltage on the battery 50V. The regulator should draw PV voltage to 29V and give a charging current of 10A which would give 500W.
At this stage i am not using a BMS with balancer but do have low voltage cutoffs etc with the BMS i did build on another one of my videos. I am building V2 of my BMS which will have balancing at 1.5amps per cell
Oh wow thats a good question. Yes you could i guess not sure how well it will work but would be worth a try. The 7210 is just a boost converter. The only way you could do it or use the 7210 in that way would be to have a separate solar panel on each of the 7210 units input. The 7210 also wouldn't be able to touch each other. Meaning as long as the input to each 7210 is completely separate then the output can be put in series to change one battery. The reason is the input negative is directly connected to the output negative so if you tried to use the same solar input for BOTH units it would be a direct short, eg pos of the second unit would be connected to ground and would blow a fuse or something. If you wanted to use the same solar input you would have to use a different unit that is an "isolated boost converter".
You can turn the fans down btw in the settings :) if you use 2 of thoose and use a standard 80mm pc case fan that even fits across both very well andf oyu can use one for control@low rpm - works very well.
what posibly happened to my controller,. it was set to 12v solar panel, 14v full charge but it always restarting,, its suddenly turns off and turn on again when the sun is so bright,, my battery is 52Ah and solar panel is 100w. what could be the problem?,
Since you have a 20s system your output current limit should be set to (3.0x20) =60, this is the lowest charge voltage assuming your packs cut off voltage is at 3.0. If higher no matter as this is worse case. Then 500 / 60 (Potential watts you have available over volts at lowest charge voltage = 8.33 A. This will make sure that in full irradiance that the MPPT doesn’t pull over your IMPP and therefore lower efficiency of the MPPT. The panel voltage should be set to your panels VMPP x2 since you run two panels in series. Both IMPP and VMPP are on the solar panel labels.
Note that I understand I should load an AGM 48V 20Ah package what you recommend as a setting In Italiano Ciao Noto che ci capisci io dovrei caricare un pacco AGM da 48V 20Ah cosa mi consigli come settaggio Grazie
No i dont think the 15-20cm ish diff in cable makes a difference as they are not thin cables so there shouldn't be any voltage drop in that. I think its more to do with the difference in components. As along as i set a offset of each voltage it will be fine.
Mikes DIY Tesla Powerwall - I had a similar issue with my setup and when pushing amps up the line I was having 1v difference on the longer lead. It's worth putting ones same length to see if that's the issue before offsetting? 4a at 80v can cause a bit of drop even though cable is thick
It smooths out the ferocious ripple generated by the big inductor coil (by the heat-sink) that's repeatedly shorted by the input MOSFET driven at high frequency from the MPU to pump magnetic flux to the output to build the output voltage up to whatever is dialed in for an output charge voltage. Make sense?
Hi, Friend! Thank You for your videos. I see You are a Master in this subject. I have hunger of knowledge and I would be very happy to learn from You. Well, I live in Israel with my wife and here I bought a four wheel electric car run by an engine of 24volts that has two 12volt, 70amps each connected in series and as in Israel the sun is excellent I decided to install a solar panel so in winter I use energy and in summer I use solar power. I tried three kind of charge controllers, all pwm and now I discovered this Minghe mppt I think, like yours but I saw that it has this clushes( stops and starts when I pass a cloud or shodow) and I would like to improve it. Like you did with yours. But I need your help telling me exactly what I need like the reference of all the capacitors. I also don't understand this numbers in the display. What do they mean. If you have an email I can send You pictures of the car and the charger working so You can understand better. Well, Our electric car has a semi- flexible polycristaline180Watt 36volts panel. Hope You can help me and congratullations for your Intelligence! Bye and Shalom. Emmanuel emmanueltango@hotmail.com WhatsAp: 09720586004419
It's looking great Mate.
Thanks for sharing your project and God bless
Thanks Man
You are welcome Mate
verry informative. thanks for the video.
can the shutting down issue be improved with lower voltage on the input side (panels in parallel) thus giving a bigger difference in input vs output side?
Looking great, and really good power numbers off your panels as well. Those Boost MPPT converters seen finicky but when you have a specific application there is not much avaliable.
very true, Plus for $150 nz its not bad.
Mike ive been concidering one of these devices for use as a 72 volt ebike charger the use at home from a 12 volt adjustable current power supply and when bike camping from 4 flexable 50 watt panels in best config thats specified whats your thoughts on the reliablity of these as relieability is the main requirement ,otherwise i was going to make more of solid sate design with adjust volt ,current and low volt cut out via a few 10k pots on the front using a 20,30 or 40 amp dc to dc module they have on ebay, any advice for someone not experienced with dc boost units ?Thanks Katie
So these contollers are actually no MPPT devices? Seems, they are increasing power, until the set voltage is reached? I'm a bit confused on that.
I was looking for why my controller drops out ever 20 seconds or so. Saw you mention the panel voltage being set too low being a possibility. Will have to try changing that value tomorrow and see if it helps. Thanks!
Sure enough my solar voltage was set to 0v. Raised it up to vmp and it seems to be working much better. Not resetting ever few seconds for sure!
I have 2 solars on the roof of my motorhome
Kyocera 2x120W
KC 120-1
Details Maximum Power 120 W
Maximum Power Voltage 16.9 V
Maximum Power Current 7.1 A
Open Circuit Voltage 21.5 V
Short Circuit Current 7.45 A
and the MPPT controller that loads two batteries from these two panels in series to give a 12V output. Can I use this controller to recharge these batteries. What voltage should I set for charging?
Can I connect the inputs of two of these to the one solar panel and set the outputs to different voltages to charge two different battery banks?
If you open those chargers, a cheap computer case with slots for 120mm fans would give you something to mount those controllers too (motherboard tray), a quieter fan (or fans) and a panel you could mount the fronts (displays) too that you could just pass the wires through. You could also have buss bars inside it to protect them instead of having that out on the board and risk (even slightly) a short.
I am about to do a fan change on the top unit as the fan sounds very sick, Will do a vid on it
I was thinking the same thing. Some nice 120 computer fans would be so much more pleasant, and everything could just be in one box.
There is a fan speed setting: while not in charging mode
1. long press on "up arrow"
2. short press "set"
3. adjust fan speed with the up and down arrow to adjust.
4. End by hitting the "ok"
sounds like an air raid in the garage.😊
Interesting you could get 5A charging current boosting from 60V to 80V -- I tried the same setup on my unit and only got max of 2.5A! What a strange device. I just wrote a blog post trying to map out the charging current ability vs input/output voltage.
help. i hooked this to the 12 v dc [ 10 amp.],output of my 1500/2000 watt generator, but it's showing 22- 23 - even as high as 30 volt peaks.it's jumpy. what should i set the input voltage and amps for? i'm charging lead acid deep cells .[4 x 12 v, [110 Ah ], = 24 v, [220 Ah ]. what should the output be set for? 27 v ?. i could use your advise.
Can we connect outputs of several mpt7210A in parallel, so that they all charge the same battery bank ?
Thats what i am doing, so yes
thanks
When you do you will need to change the batt voltage as they are not all the same between the units
good tip. in addition to setting the value, i will also check with the multimeter to make sure that the output voltages are equal in each mpt7210a
these units are booster only as they drop the true solar panel voltage down to close to battery voltage and then boost voltage up. Do these auto start every morning when the sun comes up? or do you have to manually turn on?
blimey 3 are noisy.. unplug the fans and drill the top and bottom full of big holes for air flow.?
Hmm no they dont, They are a micro controller based boost converter, Which finds the MPPT voltage of the panels "which is lower "and then boosts that up to the output which is the battery voltage.
Yes there is a setting to auto turn on, Its always worked.
haha Yes very noisy small fan but apart from the noise they do work, If anything replacing the fan with a bigger slow turning one would be best but yes it needs a fan as it has a small heatsink on the mosfet. Given the size of the case.
thanks Mike, will have to work out how to set auto on then. wasn't obvious to me?.
Hi there. Does it mean it's possible to connect two controllers parallel? Thanks
Hello, Why I can't get more charge power than 150W on the mpt-7210a regulator? In full sun, I connect 4x230W solar panels in parallel mpp = 29V Open circuit 40V. The rechargeable batteries are 48V 40Ah. The parameters set in the controller are 55V charging voltage and 10A charging current and mppt set to 29V. The regulator shows the voltage on the PV during charging 35V and the battery charging current 3A and the voltage on the battery 50V. The regulator should draw PV voltage to 29V and give a charging current of 10A which would give 500W.
Are you charging through a bms or using a discharge balancer? Trying to wrap my head around how to make this work safe.
At this stage i am not using a BMS with balancer but do have low voltage cutoffs etc with the BMS i did build on another one of my videos. I am building V2 of my BMS which will have balancing at 1.5amps per cell
Hi .. where do u get those 18650 from ?
Can I use two 7210A to charge one power bank in series (48v + 48V = 96V)?
Oh wow thats a good question. Yes you could i guess not sure how well it will work but would be worth a try. The 7210 is just a boost converter. The only way you could do it or use the 7210 in that way would be to have a separate solar panel on each of the 7210 units input. The 7210 also wouldn't be able to touch each other. Meaning as long as the input to each 7210 is completely separate then the output can be put in series to change one battery. The reason is the input negative is directly connected to the output negative so if you tried to use the same solar input for BOTH units it would be a direct short, eg pos of the second unit would be connected to ground and would blow a fuse or something. If you wanted to use the same solar input you would have to use a different unit that is an "isolated boost converter".
Does a single battery bank connected to all charge controllers
You can turn the fans down btw in the settings :) if you use 2 of thoose and use a standard 80mm pc case fan that even fits across both very well andf oyu can use one for control@low rpm - works very well.
Can i use it with lithium ion battery too.
Yes, he is using it to charge lithium ion batteries
It is nice to use smaller units this way if one fails you have two more still working. You got lucky only the cap smoked
Very lucky i agree
what posibly happened to my controller,. it was set to 12v solar panel, 14v full charge but it always restarting,, its suddenly turns off and turn on again when the sun is so bright,, my battery is 52Ah and solar panel is 100w. what could be the problem?,
Whats the battery voltage ?
Since you have a 20s system your output current limit should be set to (3.0x20) =60, this is the lowest charge voltage assuming your packs cut off voltage is at 3.0. If higher no matter as this is worse case. Then 500 / 60 (Potential watts you have available over volts at lowest charge voltage = 8.33 A. This will make sure that in full irradiance that the MPPT doesn’t pull over your IMPP and therefore lower efficiency of the MPPT.
The panel voltage should be set to your panels VMPP x2 since you run two panels in series.
Both IMPP and VMPP are on the solar panel labels.
Note that I understand I should load an AGM 48V 20Ah package what you recommend as a setting In Italiano Ciao Noto che ci capisci io dovrei caricare un pacco AGM da 48V 20Ah cosa mi consigli come settaggio Grazie
could the difference in voltage be because the cables to the battery bus-bar are different lengths?
No i dont think the 15-20cm ish diff in cable makes a difference as they are not thin cables so there shouldn't be any voltage drop in that. I think its more to do with the difference in components. As along as i set a offset of each voltage it will be fine.
Mikes DIY Tesla Powerwall - I had a similar issue with my setup and when pushing amps up the line I was having 1v difference on the longer lead. It's worth putting ones same length to see if that's the issue before offsetting? 4a at 80v can cause a bit of drop even though cable is thick
Is it possible to connect this in parallel so I can get twice the amperage
Yes, thats what i am doing
Mikes DIY Tesla Powerwall
Can you please show me the schematics
Hi Mike...I can't for the life of me get it to auto start every day, is it the timer setting?
Just for you ua-cam.com/video/f0Br1Q57IoE/v-deo.html
Oh no! The magic pixies have escaped!
hahhaha that sure did. Love that term "magic pixies" as per AvE channel, Funny and very smart guy.
What does that capacitor do?
It smooths out the ferocious ripple generated by the big inductor coil (by the heat-sink) that's repeatedly shorted by the input MOSFET driven at high frequency from the MPU to pump magnetic flux to the output to build the output voltage up to whatever is dialed in for an output charge voltage. Make sense?
Running 80v on 75v caps?
The caps are on the solar input side which is normally under 70v.
You di not answer my questions.
Emmanuel Távora Freire
sorry what question?
About my solar car!
Hi, Friend!
Thank You for your videos. I see You are a Master in this subject. I have hunger of knowledge and I would be very happy to learn from You. Well, I live in Israel with my wife and here I bought a four wheel electric car run by an engine of 24volts that has two 12volt, 70amps each connected in series and as in Israel the sun is excellent I decided to install a solar panel so in winter I use energy and in summer I use solar power. I tried three kind of charge controllers, all pwm and now I discovered this Minghe mppt I think, like yours but I saw that it has this clushes( stops and starts when I pass a cloud or shodow) and I would like to improve it. Like you did with yours. But I need your help telling me exactly what I need like the reference of all the capacitors. I also don't understand this numbers in the display. What do they mean. If you have an email I can send You pictures of the car and the charger working so You can understand better. Well, Our electric car has a semi- flexible polycristaline180Watt 36volts panel. Hope You can help me and congratullations for your Intelligence!
Bye and Shalom.
Emmanuel
emmanueltango@hotmail.com
WhatsAp: 09720586004419
very nice but ugly sound