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Where I live we are beginning to see that we have too much solar power at certain times (and these times will only increase in next years) So it is becoming more and more useful to disable grid-tied solar inverters. When you don't have any storage or can't consume the power yourself. This topic...

There are several CAN based BMS solutions on the market, this topic is not about which one to choose, it is about a design choice. Say you have some battery modules paralleled, and they don't have their own BMS. They have their own slave CAN bus module which talks to a master one. I see two ways...

I see the data sheets of the Deye hybrid inverters, looking at the high voltage versions, I cannot really get what the charging power is from AC (grid) to DC. There is a DC max charge amps, but the voltage can differ greatly, making it exceed the rated power of the unit. I would like to buy a...

Hi all, A question to which the obvious answer is no, because of safety. However, I am still looking into it. Knowing that I have experience with specifically these BMW i3 NMC chemistry batteries (I have already been using them). Knowing that NMC chemistry can have thermal runaway (above 70...

I have a 48v lithium battery at relatively low voltages (12s nmc so 49.2v it is fully charged) which already shows that I cannot use most wind turbine controllers (because the output voltage is not configurable) I want to experiment with a 48v 500w chine wind turbine. If it will only bring me...

Are there any low-voltage liquid cooled inverters around for 230v? Preferably around 48v DC input. There are several chargers that are liquid cooled, for example EV on board chargers, also for lower voltages. But I only see high voltage DC/AC inverters that are water cooled. If it was...

Hi all, I built a lot of systems already with the usual charge controllers and inverters etc, but this time a tiny project with a tiny solar panel. Some LiFePo4 cells, probably at 12v/4s max 20Ah and a 20 to 30W solar panel so very low C rate. Perhaps I will use 2 of these 20W trickle charge...

Hi all, Although I don't typically like small wind turbines, I live in a windy place and thought to test one out. I bought a second hand FX-600 Wind turbine which seems at first to work well. It is a sturdy unit and I actually believe the 600 Watt can be achieved. Now, I borrowed one of the...

I am finding it hard to google this, as you get so many irrelevant hits. This thread is specifically for AC coupling of Solar on the load output of the inverter Yes I prefer DC coupling too, and yes I know there are lots of inverters that let you couple AC solar on the Generator port (such as...

Hi all, I am in Europe, so I want to buy a 12v 2000W Renogy inverter that makes 230v 50Hz. The German Renogy support is not giving any hard answers if I can run an induction cooktop. Not all inverters like that. I want to use a portable induction cooktop of 1000W, and possibly 2000W. Because it...

In recent years some DC mini-split airconditioners have come to the market. At least in China and US, here in Europe I would need to import them. And they might not comply to everything needed here, but let's leave that out of the discussion for now. There are the hybrid types, and there are...

Hi, I put a new 200Ah Renogy bluetooth battery in an existing van. The van has a Victron DC/DC charger, and an Epever MPPT solar charger. Both the Victron and the Epever MPPT have been working, and I have also seen them working on the Renogy battery. Also the Renogy battery itself works fine, it...

I am (very likely) buying a van that is built with a 650 Volt electric drivetrain. I want to modify it with a new battery pack and so on. One of the things I would like to do is use a grid-tied / AC-coupled inverter to make the energy use more flexible. Currently the van is already fitted with...

I am (very likely) buying a van that is built with a 650 Volt electric drivetrain. I want to modify it with a new battery pack and so on. One of the things I would like to do is use a grid-tied / AC-coupled inverter to make the energy use more flexible. Currently the van is already fitted with a...

I have almost 200 Winston Thundersky cells of 60Ah , about 9 years old. I think there is still for 80% capacity in them, so at least 30kWh to be used. However, some cells are probably not that healthy and will die quickly. They were never paralleled. What are acceptable internal resistance...

TLDR: 48v li-ion NMC battery modules, why does JBD 3.7v bms 7s-20s descirption say that it is not good to parallel them, if I don't expect balancing currents higher than BMS can handle, protected with a fuse for each 48v module? Long version: Hi all, I have 2 times a 14s 10kWh block, it is NMC...

Hi, for a project I am looking to heat water directly with 48v. With at least a few kilowatts of power. Right now I only see 230v heaters or 12v/24v low power boilers. So it seems to me that I need to make a small box with some 48v heating elements (for example 2 times 1.5kW) and run the water...

Hi all, I have been using Midi, Mega and ANL fuses in the past. However, I sometimes run into the issue I want to power some small 48v load that only consumes something like one or two amps for example. Lets say I would want to fuse it at 5 amps at 48v. Preferably inline fuse, but not a hard...

Hi all, I am doubting to switch to serverrack batteries for vehicles, rather than custom made batteries. So lets say I am using the battery within spec, including temperature and humidity, what would be the issues? The front mounting points aren't enough, you would have to support them on the...