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The easiest way would be to use a 12V/24V DC pump with a 12V/24V AC power supply and a 12V/24V nominal (18V/36V peak) solar panel in parallel with 2 blocking diodes. When there is enough sun, the panel will deliver more voltge than the power supply which won't have to supply any current.

Now the project has got an extensive user manual explaining all steps to realize the project according to your needs: User manual you might want to directly download the PDF (30 pages) to read it off line.

Now the project has got an extensive user manual explaining all steps to realize the project according to your needs: User manual you might want to directly download the PDF (30 pages) to read it off line.

Today I have concentrated on documentation. I made an overview synoptic to facilitate the understanding of what's offered: Currently, if you just want to sniff around without yet investing in hardware, buying a bare Witty ESP8266 board (3-4$) is all you need. Next development: Next, I am...

Just a few lines of code more: With the parameter A0_IS_SIMUL, and using a stock Witty ESP8266 board, I have now a light-driven panel+SCC simulator. For me, it is convenient to get some life with halfway plausible values onto my dashboards and statistics in order to debug without the need to...

Maybe reduce ventilation overnight, so that the batteries would not cool down that much??

Usually, condensation does not happen in ventilated a room, where energy is dissipated.

The remote ESP32 is programmed and I am providing 6 colour screens to display the information gathered and derived from either a Victron SCC or a shunt (vendor agnostic) Screen 1: Output Screen 2: Panel Screen 3: Overview Screen 4: Battery Screen 5: Coulombs (integrating current hour, last...

I will soon describe the Non-Victron vendor-agnostic Smarter_Shunt variant. The material required is very limited: A micro DC-DC converter An ESP8266 microcontroller: e.g. Wemos D1 Mini An INA221 Off-Rail Voltage/Current measuring module A shunt corresponding to your needs (which you may have)...

Sorry, her as PNG:

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...

Just a remark for those on Windows. If you want a connection with Telnet, don't use the broken Windows' Telnet option, which does not handle CR/LF correctly. Get WSL (the Windows' Subsystem Linux) and from there, use a working Telnet to communicate with your IoT devices. Windows PowerShell...

For those following this project: Initially, it was ESP8266 only. I am currently rewirting the code to accept ESP32 modules as well. And especially the TTGO-T1 board, which features a gorgeous color display: It gets a boot report giving all important information like the IP address, whether...

If NTP does not work, one should increase the delay in setup getNTP(); delay(6000); getEpoch(); // writes the Epoch (Numbers of seconds till 1.1.1970... It's not unusual that the NTP server responds slowly. you can increase it to 15 seconds.

Your should replace de.pool.ntp.org with ca.pool.ntp.org if you are in Canada. Tell me if it works reliably.

An ESP32 is not ideal, I haven't actually tested it with the actual code. Hmm why? Is your network wonky? Console1 is a macro defined in a_Libs_Vars: #if defined(TERM_IS_SOFTSER) #include <SoftwareSerial.h> #define Console1 SoftwareSerial #endif #if defined(TERM_IS_SERIAL) #define Console1...

It can't: Serial is busy with the Victron port. You could try with TERM_IS_SOFTSER to check, but Telnet is ways superior.

you are supposed to get the time right: that one in not what you should get... Probably with the right NTP settings?

Yours (in Canada i assume), of course.

Splitting the code in different functional sub-parts is considerably easing programming and debugging. You can jump easily from a change in the initialization to the data processing or from a change in the menu to the corresponding change in serial output... it's a great feature of the Aduino IDE.

You need to install the telnet library. Install Telnetstream, then compile. Have you enabled Telnet on you computer? Note the address of the ESP device On your Computer enter telnet [address of the ESP device] Enjoy! P.S. once you have compiled the first time and are connected, you can upload...

It is not that complicated. Just copy the content of the Software folder in a folder named ESP8266_Victron_on_Steroids, which is placed at the sketch location that you have configured to hold your Arduino IDE sketches. You find that folder at the beginning of Settings from your Arduino IDE. You...

Look at my instructions below on how to download the code from GitHub. You ought to use TERM set to TELNET. It is a much better way (wireless i.e. no surge risk) to connect. An ESP32 can basically open a second serial to D7 , but i did not test it yet. For an ESP8266, which I recommend, it is...

Just connect TX. The ground comes from the battery. To compile, don't worry, just use all .ino and .h files. Just modify credentials.h and Config.h to adjust to your needs. Put _NONE to what you don't use (the compiler will ignore what is not used): //----------------------- HARDWARE OPTIONS...

yellow would have been Victron data input. We don't use it. Black is Ground ~ Battery minus Red is +5V but it is too weak (20mA max) to power an ES8266: we have to make our own +5v from the Battery plus over a buck converter.

Higher doses of lithium is not a source of energy. It needs to be charged as well. And -you can count on that- you usually start long periods of snow with already depleted batteries from a few weeks of overcasted cloudy days.

I have for example a dumb* buck converter in // with my grid-tied solar inverter on 38V solar cells. * just take care that the buck converter can handle more than 45V input and has an adjustable volt / amps feature that you can set to 13V / 2A On the DC side I have the regular power supply of...

Ooops! I overlooked that. Sorry!

It's all about how many sunny days you have in winter. And designing the whole house around off-grid requirements is not accessible to many of us.

Even being quite north: when you have enough sun to have excess power, you mainly don't need any heating.

What is that in metric units? ;) Anyhow you ought to buy a huge tarpaulin and install it over the containers to shade them. That is at least as efficient as the insulation.

That is it. Here you just can't live off grid from our climate or you need 1Km² panels with 500KWh batteries.

Your batteries can bridge three weeks of overcasted weather?

They always have a few taxes and levies advance over other countries...

That is -under our latitudes and maritime climate- an utopy. I frequently have two-three weeks in sequence without any relevant solar contribution: The inverter won't even start.