Hakutulokset

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.

In the UK, Sunsynk has exclusive rights for Deye distribution. In the EU, you can get a Deye directly; there are no exclusivity agreements.

I've got another 32 280Ah cells coming, so I'll be well over 100kWh in total by the time they are installed. NKON has them at 58 Euro each - good times :)

To bad the cells are welded, so that makes reconfiguration/fixing hard. They have REPT cells - and if you calculate the price per kWh you can get about the same (without a case of course). https://eu.nkon.nl/rechargeable/lifepo4/prismatisch/rept-cb75-314ah-lifepo4-3-2v-grade-a-from-2022.html...

Yes, my calculation was theoretical max. The Reynolds number will drag this down much further in practice due to increased drag.

Don't go with small wind turbines unless you have absolutely perfect conditions. It will be a disappointment otherwise. You're dealing with two fundamental issues: - The Betz Limit - The Power in Wind equation The Betz Limit is basically a theoretical number of the maximum efficiency you can...

I've been running them now for several years. It's great. It's not Victron level stuff, but I can get spare parts (I have replacement boards and components) and they're very cost effective. They have not given me any issues.

20 x 500W PERC Yangtze Solar Power 16 x ASTROENERGY 410 W PERC MONO 60 kWh LFP battery (soon 90 kWh) 6kW MUST inverter and 3kVA Victron Multiplus II 3 x 100A PC18-10015F MUST charge controllers for all the panels. Old 10kVA Diesel generator (running my own biodiesel).

By putting the MOSFETs in parallel, you lower the resistance and thus lower the losses and power dissipation in the BMS. You could do a calculation as follows (for e.g. a 200A JK BMS): Rds_on = 3.2mR typical at 25C per MOSFET. We have 10 pairs on the top and 10 pairs at the bottom for this...

It has a Coulomb counter, but it is not very accurate. You can calibrate it with the app, but still. If you want accurate state of charge measurement I recommend something like a Victron SmartShunt.