And here we have the finished DC Load! The software currently only support "Const current" mode, however, it can be improved. My goal is to have a fully functional:Constant CurrentConstant PowerMPPTBattery testerFinished DC load
So after some research i decided on 2* 300w 24v solar panels. I also bought a Mppt solar charger from Victron energy. There is a lot of other version and prices, but this was the best and cheapest that fit my specs that i wanted with my budget.
TO DOThis will be about selecting the right solar cell.I assumed I could use the 6 or 7 volt solar cell that I already had, as long as the light was only bright enough to provide an actual voltage of only 2V or 3V. It seems that this assumption is incorrect....
I found out the hard way that the PowMr was not putting out a small regulated DC voltage like most MPPT controllers claim to, and the output was in fact the whole 25V of the battery pack.The cable for the screen for it is also wayyyy to short to make...
The BQ25504 have the ability to provide undervoltage and overvoltage charging regulation, which ensures that the storage component doesn't get damaged. For programming this threshold certain resistor values are required. There's a formula on the datasheet,...
In a previous project log I talked about using the RT8299 buck regulator and PWMing the enable pin to simulate a MPPT. While this isn't necessarily a textbook MPPT solution, it is an appealing one due to the high level of integration and low cost offered...
Like many people I had a traditional AC-DC UPS supplying power to my home network. One day I awoke it it beeping away and running on battery power even though the mains power was present. And then it died. So I did what any maker...
I have managed to get the current to readout properly as well, this was pretty strait forward to get it to display sometime, less so to get it to display a correct current. There is an interesting issue with bringing power up and down on this TI MCU...
Just a quick update......but nothing useful really.The Supercaps that were ordered from AliExpress on 22nd Dec still haven't arrived, although other items ordered on the same day have arrived. So it shouldn't be too long before I can complete the module...
Here are some initial information about the main PCB. It contains a GSM or LoRa radio module, a solar MPPT charger, a possibility to use the connected solar cell as a pyranometer, a stepper motor driver for the correct alignment of the...
Initial PCB routing is competed and I am working cleaning up traces and adding text to silkscreen for headers etc.All three boards pass design rules checks.LRMS LoRa Transceiver R2LRMS LoRa Gas Sensor R2MPPT Solar Power Module R2
After adding a second solar panel 😎 (170W, just like the first), I observed that when connected in parallel, the total power generated, as measured by the EPEVER 1210AN, was approximately 130W. This was the same as the power generated by a single...
A long time ago (man, almost 1.5 years ago) I tried my hand at a SEPIC, with mixed results. While the topology indeed works as a MPPT, the two inductors required by the topology made the cost quickly go out of budget (switching at 31kHz). So, I canned...
Here is a rough overall system diagram for the project. Various atmospheric sensors are interfaced to an mbed (probably one of the ST Nucleo boards because they're cheap, have much I/O and I like them) which acts as a sensor interface for the Pi Zero,...
Before working on the circuit design of the MPPT it is a good idea to simulate the PV system and create a preliminary proof of concept. The software used to simulate the system is Matlab Simulink. All the related scripts can be found in the following...