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I am looking for an Electrical water heater. Just need it for a shower so 20 Gallon or even less would be OK. I am powering it from a 10kW Growatt SPF with 2x200ah 48V LiPo batteries. I don't think I need quick recovery time per se. Would it be better to go for a 240V option or would a 100V...

My 10kW Growatt inverter shuts down every night; presumably because of Low temp. The last recorded temp on Solar Assistant is just below 2.5C I have the batteries on heating pads, but if the Inverter shuts down the power generation I lose the heating pads. I tried connecting the heating pads...

Yes, But not connected and only one is running SA

I am not getting nearer to any sort of understanding of how my Growatt inverter actually works it looks like. If I look at the Screen on my Inverter the settings that should trigger the Dry Contact are #1 SBU #12 40% #13 80% If I look at the Inverter Config Page in Solar Assistant, it shows...

Never "played" with BMS tools, can you assign certain signals to the dry contact in BMS tools?

I'm not sure if I 100% understand the full setup of your system but pumps are pretty simple. You power them with 240V (mostly) (Sure you can use 120V or DC even, but from what I think your setup is, you are going to need 240V) and they pump. I use VEVOR 3HP deep well pumps in a barrel to pump...

I understand the concept of Dry Contacts, it's basically binary code :"OPEN"-0 OR "CLOSED" -1. So with 4 terminals on the server rack battery , you can basically create 16 "messages", or communicate different states. I wonder if somebody knows what these messages are, I assume they are...

Kudos for solving this "problem", before it was an actual problem :) Where is the water from the stored water tank coming from? Are you bringing it in? In that case I understand you went as far as figuring out this 15-minute cap. I have a similar situation, but I am pumping water from a creek...

My Sunpal 48V 200ah Batteries use a PACE BMS that has 4 dry contact ports on the front. I have seen them on a lot of server rack batteries. I have never used these contacts (I use the CAN connection to the inverter and the RS232 to connect to Solar Assistant) but I'm curious. I have tried to...

The question is easier than the answer. The problem is (in practice) that by only looking at the material you overlook the actual enclosure package. I assume You are probably not going to enclose the front and therein lies the problem. In order to calculate the R value of the enclosure as a...

The settings in the Growatt inverters can be changed manually by changing the values of the 28 menu options on the touchscreen. They can also be changed remotely by logging into the server (https://server-us.growatt.com/index) and accessing the settings via the wifi datalogger (if installed)...

The question remains whether Solar Assistant is able to control the dry contact settings. My assumption is that they can write values on all fields/values that can be set in the settings page you see on the US.server page. The Dry contact setting does not seem a value you can set individually...

Thanks, @timselectric, I will look at #19 and #20, but I though they only mattered if a User defined charge profile is chosen in setting #5 and I am on LI. The generator is brand spanking new so doubt that that's the issue, but I'll measure resistance on the two wires next time (If I can even...

#1 SBU #12 40% (LI) #13 80% 2x200AH 48V LiPO battery I realize now that I do not know what value I set for #14 ( Charger source priority: ) Does that need to be set to any specific value for the dry contact to work properly? I was going to check remotely, but I lost power...

I just Installed SA 2 days ago and love the interface and the functionality. Not going back to the Growatt server page or Shine anytime soon. I have a question. It looks like Solar Assitant can change a lot of settings in the Inverter, but is there a way to get SA to open and close the Dry...

I use this set for everything. https://products.wera.de/en/tools_by_trade_tool_sets_for_bicycles_and_e-bikes_bicycle_set_torque_1.html They are a bit expensive in the US so I just order from a german bike shop (bike components). All the WERA tools are amazing; great quality and good value.

Strange question maybe. How do you know what make and model of BMS is installed in your LiFePo battery? I have a couple of "Sunpal" 48V 200ah batteries that I somehow ended up owning (long story). They work well but I have no idea what BMS systems are installed in them. Is there a way to find out?

Thanks for the responses, learned a lot. It does look like the "grid" could use some kind of communication standard. Managing the capacity in a cluster of around 1500 households (which is a good average substation size) with some hybrid of solar and batteries seems somewhat feasible. If data...

A lot of talk about "terminology" and how things are called. I am interested in how this actually really works. How do grid-tied inverters actually "supply" excess power to a grid and how does a grid "absorb" this power? Is the Voltage increased slightly creating current in the opposite...

Grid Forming Inverters are being suggested as a solution for the Solar and wind "supply/demand" problem. https://www.sciencenews.org/article/one-device-transform-power-electical-grid-inverter I will admit that I do not really not what the difference is between "grid following" and "grid...

The Inverter you suggested Tarvis is designed for a very specific purpose. It will run a pump if two conditions are met: 1. there is solar power available 2. The low water alarm is triggered in the holding tank. In that setup, the only purpose is to make sure the upper holding tank is filled...

For reference : I run a 3HP 240V deep well pump (vevor) to pump water from a creek to a tank. 1.5" Poly Pipe around 900' in length with 450' head. Have 10kW solar system with growatt 10kW inverter and 2x200AH 48V Lifepo4 powering the whole thing. Works well when pumping but it does feel like I...

I Ended up Buying a Kohler 10RWRes Generator. Installed today. That has inputs for 2 wire start on the board, super straightforward., no contactor or whatnot needed. Its $1300 more expensive but I am impressed with the build quality. (just based on opening it up and installing it). Its is HEAVY...

You can of course generate energy using PV's as well as Solar Thermal; I have no dog in this fight. But a back-of-the-envelope comparison in scale: You would need around 700kW of solar PV which translates to a whooping 1400 panels @500W each.... ~3800m2 (40K SqFt) of solar panels. That is a...

Maybe the lack of real-world examples for a large-scale solar has more to do with the lack of use cases. Giant hot water demands are not that common and in that scenario, a more industrial solution would be more appropriate rather than a consumer product at scale. That said, (and I am not a...

Solar thermal seems like the way to go here. That is ~75% efficient vs ~15% with Solar PV and heat pump. I do not know why these systems are not popular in the US. Every residential development built in the last 10 yrs in Spain and Israel has a solar thermal collector and you can buy them for a...

I understand the general principle but I was looking for more specific low-temperature cut-off point information (assuming this is somewhat generic for Lifepo batteries). The documentation on the batteries indicates a minimum temperature of -10C!

Hi, I had 2 Growatt (SPF10.000) inverters report fault 4 this morning. SOC on the 2x200AH 48V batteries was >40% but the temperature was quite low. Around 6 degrees C ( 42F) so my guess is that the Battery BMS is going protective because of low temp but not sure. Has this happened to anybody...

Digging into this a little more, I fear it may be a bit more complicated. While Generac Generators are two start capable they do not all have this built-in and you need to buy a 2 wire start Kit for $30 or so. It is basically a bunch of wires that need to be installed as per this document...

Were you able to get this Connected and working properly? If so please post the resolution. It looks like the 2 wire starter KIT is just a bunch of wires that are easy to make yourself but it would be good to know what to connect where. This is what the instructions say, but without seeing the...

It should really be as simple as connecting two wires from the Dry Contact on the Growatt Inverter to the 2 wires on the Generac. . From the youtube video it looks like the generac needs a close on the two wires to start in which case you should wire C and NO. Unless I am missing something....

Hi Jon, I am trying to do exactly the same as what you are trying to do, so curious what you end up with. I am surprised by your electrician's comments. Scenario #1 is exactly what you want right? Your growatt inverter has a setting (12 and 13) for when it wants to switch to Utility (UTILITY in...

Hi, Any recommendations on a generator to pair with a Growatt 10KT dvm inverter and 2x48V Lifepo 200Ah batteries? I Have a cheap WEN 10kW generator I use manually but would like to see if I can use the dry contact functionality on the inverter to activate the generator automatically. Something...

By the way, for what it is worth. I did just get a "manual" in 50% English that pretty much describes everything as per the Youtube Video. Why this is not properly translated and included as a manual is beyond me, but I have attached it here for reference. In case anybody runs into the same...

Awesome! thanks for sharing, I'll try this weekend.