Dc to dc Stepdown Converter for Solar Power System - Live Test! | Is it Worth it?

The dc to dc step down converter also known as a buck converter can efficiently bring down voltage. But in the case of solar panels there is a big difference which it cannot control. That is the panels output voltage. MPPT charge controllers can keep the panel voltage at its maximum power point and extract the maximum amps. But unfortunately buck converters can't hold the panel voltage at its maximum power point. This causes the panel voltage to drop. Once the panel voltage drops the buck converter cannot increase the amps. Even if it rises it is only slightly better than a pwm controller. But again it depends on your solar panel combination. If you have a higher power and voltage panel then you can get visibly better amps from the system.
Ths video explains this with a live practical test with a 150w 18.5v solar panel ss the power source.

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[iknowiaminsence]

Bro, i have smu 1230 model purchased 2450rs 😑 it can't push more than 12amps in sunny day of 325watts it mean 160watts pushing to load or battery, what can i do to increase amps 😢 now i cannot afford mppt, shall i add another pwm controller in parallel connection 😑 please bro help with your reply

[LostSoulsMed.]

I think that this set up well work for higher voltage application to get that extra juice of power from the system, the problem with most PWM controller is that they only step down the voltage to the battery voltage for safe charging and the current remains the same(I mean that is how they work) but with mppt, you get that extra juice by converting that higher voltage to the charging voltage but also increasing the available current, this is why it is more efficient than pwms, in this set up the problem is that the panel produces different voltage as the sun shades changes as to the weather, so you have to constantly change the output voltage of the controller to the working voltage, my suggestion is to choose a step down converter with a constant 12v output, like those from the market with 6v-70v in to stable 12v out, with this the voltage is constant to 12v, and in series with the pwm, the pwm will do the rest providing, LVD and HVD for the battery and load control. This set up also poses an amount of loses, but most converter have 96%+ efficiency so for bigger system, I think its worth try .

[LostSoulsMed.]

Nice video. My question to this is that, does the dc buck converter don't suffer from converter collapse, in which when the batterys caoacity is large and the converter will draw more power than the solar panel produces? Does the PWM prevent converter collapse by regulating the charging voltage and current? That's the only question I had by the way this set up seems to be more efficient than using only PWM alone, cause pwm in their nature only steps down the voltage to the battery s charging voltage without converting that excess voltage to usable current, If the panels are producing 18v at 5amps, it will only step down the voltage to lets say 13v for charging a battery, and the current remains the same which is 5 amps, this set up enhances efficiency by the bucks converter converting the excess voltage (14vto 18v) to usable current, adding some usable current to charge the battery, in this demonstration your meter shows a current increse of .2amps, about 3watts of incresed power, not bad at all, and it will increase voltage increases. Good work, my only question to this, is that does the buck converter didn't suffer from converter collapse?

[dharma.vibrates]

Brother can we use this buck converter with an inverter to charge a 7ah battery by lowering down the amphere to 1amp?

[HenrikHvalpen]

I played with a thought, if my solar panel is very far away, I could use a buck converter to boost the voltage to 100v then use another buck converter to lower the voltage back down.
But if my charge controller already use a MPPT the MPPT function wouldn't work?

[vLife]

On the roof of my van I have a single 320w 40v solar panel. I want to install a dual input DC-DC Alternator and PV charge controller, but none of them take more than 32v max. Is this it a safe solution to install a 48v to 24 step down? Efficiency losses? Will i have losses when I'm not getting much solar in partial shade or cloud cover?

[alipediasolutions]

Agr pwm cntroler se buck convrter ko connection krle tw kya fridge chalega inverter fridge....without batter

[Middle-Eastt]

If you are charging lithium batteries and conscious of over charging, go for buck converter. Your BMS won't be able to charge the battery above buck converter set output voltage. I've not use my 18650 lithium 4S setup for 3 days, just to be sure it won't charge above 16.3V. that is 4V each cells. With the buck converter, all you need is a BMS to support the batteries.

[dotKey]

I have a different problem. Using 640wp solar panel. VOC is 25 and, 30amp in total. Also using hybrid PWM inverter with 12v battery.
Currently I am getting 18-24amp from solar.
Can I use 3 x20amp buck converter parallelly to improve the solar current as input of the hybrid inverter?

[tooyvivo]

The additional amps is for the buck converter consumption. It does not enhance the efficiency of the system, it just an additional load for the panel. Better to use two scc in parallel.

[aldymcpndg]

I'm wondering if you don't have enough voltage on the input side. Would it be functional if you use a step up converter to meet the needed voltage. Thanks

[ryukhalfani]

Hello, i want to use this buck converter to my 60 aH spesification battery, is buck converter still compatible with that ampere?

[whotu]

Thank you for your vid. My Solar panel outputs 22 volts. I am using the same charger controller as you. But 17 volts breaks through the charge controller .. it may ruin the 12 volt battery .. Would this Buck Converter help bring the voltage down, to protect teh battery. Thank you for your help Namaste

[dannycaparida]

not working for pwm scc, working only for MPPT

[yusifsuleiman]

Nice video, and thanks for the information.
I have three 30watts panels, pls how can I connect the dc converter to improve their efficiency.
Regards

[katiekumcgil]

hi hello, i was watching the way you were connecting the wires, you connected the output of buck con to the solar panel input of pwm chrge con, and the wires you had in your hand we were unable to determine if this was from your solar panels or was it from the load you had on, because then those same wires you connected to the pwm chrge con Battery output, which will not give you any comparison of with or without the buck con unit, i think you need to revise your method here sorry mate.

[In_the_name-of_ALLAH]

Can step down buck converter power on the inverter without battery ..direct from solar cell?

[jgbelmont]

Dude trying to turn a pwm into an mppt with a dc to dc LOL Save and buy more panels or batteries dude!

[studentshelpdesk_FSM]

How to step down dc to dc?
input 450 DC Voltage to output 24 voltage

[trywith-hesham]

I use this stepper to operate the inverter without a battery only