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If your man says you should believe him. There is no reason to remind him of that, every two years...

A buck-boost converter is really a nice thing to have, when you have a solar battery bank. With such a device you can load secondary batteries e.g. from tools, laptops, eBikes, even with different voltages: lower or higher. That Chinese 38V/6A DC-DC buck-boost converter is well manufactured and...

I am retired since 5 years now, but I used to work for the main concurrent of GE. I swifted relatively early to management tasks -in which I did not believe- but they were well paid. So can one spill one's own life doing stupid things for money! I am now happily rediscovering my old friend, the...

(Original old post replaced with something more representative of the current situation of my project) I will maintain that first post current to give a first impression of the project at a glance. My project Victron_VE_on_Steroids gets more and more functions. It started an alternative logger...

The prototype board is only there to give some mechanical stability. I have soldered a micro DC/DC converter behind the ESP module to feed it from the 12 V battery. $ telnet 192.168.188.28 Trying 192.168.188.28... Connected to esp-7b1476.fritz.box. Escape character is '^]'. BatV:13.8000...

https://diysolarforum.com/threads/low-power-bad-weather-solar-harvesting-an-attempt-to-build-a-better-scc.13847/ It is still work in progress but I came very far and have already wired prototypes, and written most of the code. Soft Power (Github) The main focus, beside low-cost, is the ability...

Is someone interested? I have built an ESP8266-based measurement system that includes a powerful battery supervision system as a side function. It tracks the battery voltage, current, power, evaluates the battery resistance and charge level and displays it on the free cloud service Thinger, so...

My project Victron_VE_on_Steroids gets more and more functions. It started as an alternative logger for the Victron VE interface (MPPT Chargers and Smart Shunts) It can now be configured as a very low-cost vendor agnostic Smart Shunt. The Smart-Shunt hardware is extremely limited: - a shunt...

I have rebuilt my Home Brew Victron Logger, to be less clumsy, it also accepts an optional OLED display: The project is discussed here. The material required is very limited: A micro DC-DC converter An ESP8266 microcontroller: e.g. Wemos D1 Mini A JST 2mm pigtail A screw terminal Optional...

Keep the batteries at float: it's a buoy!

I have now posted a new version with following improvements: - can be compiled for ESP8266 and ESP32 with the same code. - streamlined configuration, no need to specify which ESP is used. - option to determine the thinger.io device name from the ESP-MAC address (to use the same compiled result...

I have now tested the green mini module with the various voltage presets staging a MP2315 chip. With the same heat sink and 22°C around, it feels perfectly cosy managing permanently 22W with 95,96% efficiency. That module is definitely superior! It seems to run >24W without any difficulty...

It is already WiFi ! I won't sell anything. I am retired and have enough money to live. The next steps will be to add an Internet dashboard.

I have rebuilt the Soft Power micropower version for Panels <21W The primary buck converter is now vertical and has a heat sink. This version is able to sustain 20W without time limit at 25°C.

Hi, the Perturb and Observe MPPT algorithm is well known and mainly works OOB. I think a very few people did really really test how their implementation works under every possible situation. I am looking to share experience about how to implement it to be as efficient as possible. - How...

I think this will probably be the last hardware iteration of my SoftPower project: This final version is built around a three channel power measurement module INA3221. I managed to get everything into a rather lean schematic diagram...

The reports are getting more and more elaborate: 14:13:33.999 -> Waiting for input 14:19:17.504 -> B 14:19:17.504 -> Battery Stats 14:19:18.143 -> Hour | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 14:19:18.178 -> Bat Ah |...

You have a gorgeous solar system and a battery bank to make Elon Musk jealous. Well! You can do better with your battery than feeding an inverter. DC/DC is always more efficient than DC/AC/DC to carge a quantity of devices: your eBike, vacuum cleaner, computer, tablet and so on. There are a...

Yes, they belong to the category asynchronous motors that, together with functional plugs (radio controlled and WiFi switches, power meters, programmers etc..., small appliances with electronic timers are fed by a capacitive voltage reducer, that don't like MSW. That is just a quick shot just...

IMHO, even with 1125AH, if you need more than 5A permanently to balance, your battery isn't sane anyway. One balancer should be enough. Too much balancers would hide defects and, finally, be counterproductive.

30 years of marriage + poor people skills... What an understatement! ;)

That distribution box provides several 12V outputs, one being radio controlled. It has two step-up DC-DC converters one to 19V, which is the charging voltage for many laptops and my soldering iron. and one 38V which is the voltage of my LED lighting system. One adjustable step-down DC-DC...

Now made a major upload on Victron-on-Steroids what I can test without specialized hardware works. Look at the progress on the README.md and the docs on /Documentation, I have documented examples with screenshots. I will now make a longer Christmas pause from programming. Just evtl. add...

Schematic (as far as a schematic is required)

Good idea! maybe just a sub under Solar Equipment Reviews and Technical Support after All-in-One Systems could do perfectly? Home brew electronics could fit all needs and is specific enough. Isn't it?

I'm afraid you did not get it. In most cases of off-grid use, 20% dod is just the regular daily cycling when you get a sun-charge the next day. You MUST dimension your battery much larger anyway so that you can bridge a week of snow, really bad weather, or whatever mishap... Since that do not...

I have drawn the schematic: https://github.com/rin67630/Victron_VE_on_Steroids/blob/main/Victron-on-Steroids-Smarter-Shunt_Schematic.png The project will now have several options: a) plain Victron logger from the VE-direct port. b) Vendor-agnostic smart shunt based on the INA226 chip and an...

Finally, instead of trying to fix the crappy behaviour of analog circuits with pseudo MPPT, I found it to be more effective to start from a cheaper plain synchronous buck converter without power point control and do the complete control (MPPT and Battery charge control) by software directly...

I love the blue rocking cradle: that's for load balancing? ?