Jäsenen upnorthandpersonal uusimmat tuotokset

I use my batteries down to empty in winter time. If your batteries are not used in winter, sure, store them at 50% and turn everything off (and disconnect the BMS if you can, otherwise it will drain the battery as well). But if you're using it all winter, and have alternative charge methods...

Some manufactures say it's fine, others say it's not recommended. Personally, I don't like it, but that's just me. You're likely fine. This discussion has been going on for years now. There likely are benefits to compression (bad term, I prefer fixture) but if done wrong it causes more harm...

With LFP, you can't know if you're at 80% using voltage, so unless your inverter gets this data from a coulomb counter, you're not at 80%. You could even be at 60% or less, and the voltage would be the same. This is due to the flat curve of LFP, and why you have to be above 3.45V to balance...

So, after this heat wave in Finland I was able to fully test my radiant cooling system. The way it works: use the air-to-water heat pump to make cold water, and pump that in the floor like you would with hot water in heating season. You have to monitor dew point (so you don't have condensation)...

That's the old style JK (although the original one had the black case, the 16s and over still do). I run 8 of them, some of them for 6 years now continuously without issues.

Tämä on vanha tyyli: tai Tämä on invertterityyli: Se on suurempi, isompi muototekijä, enemmän liitäntöjä laitteiden väliseen viestintään, ja voit päivittää laiteohjelmiston.

Keep in mind there are two versions of the BMS: the old style ones, and the newer inverter style. That software only works with the inverter style.

You can use TTL to USB instead, that way you don't need to get the RS485 adapter. I have the pin-out and connector type on my GitHub: https://github.com/PurpleAlien/jk-bms_grafana You can also find the connectors with leads pre-made on eBay and the like, so all you need is a UART to TTL...

They pretty much don't. The efficiency is well into the 90%, so not much losses that can contribute to warming them. I calculated a PIR box at some point, which can keep a 15kWh (16x280Ah cells) warm at -20C outside with a couple of 7W heating elements: - Assume a battery box, roughly 0.9...

You need a BMS. A BMS has a view of individual cell voltages, the inverter does not. You could have one cell above the threshold while the overall pack voltage is below inverter settings.

I just increased my battery to 120kWh. Here is the calculation: For our DIY pack, we go with cells from NKON. If going with B-grade, we can use Envision HC-L315A 3.2V 315Ah. Getting 16 of those for a 48V battery, we end up paying 54,90 Euro per cell, for a total of 878.4 Euro. We also have to...

Sure, you can't charge below 0. I actually tried that before (see video below), and we're doing tests on this in the lab also on Sodium Ion and others. It's however pretty trivial to create an insulated box with a small thermostatically driven polyimide heater coupled to a spreader. I did a...

You can store an LFP battery in very cold temperatures - you just can't charge it. Storing at low temperatures even slows down calendar aging.

Hyvää joulua, ja olkoot fotonit kirkkaat paneeleillanne vuonna 2025!

Assume all of them can be bricked, so especially for critical equipment like power inverters etc. - don't connect them. You don't have to connect a Deye to the Internet for it to work perfectly fine.