Most reacted posts

Most those cheap scooter batteries are FAKE AH ratings. Really hard to trust stuff from china.

I just found this video of a guy using Batrium & Goodwe HV inverter to build a HV battery

Absolutely would require a communicating BMS of that im sure. Ive got a call with a VPP provider booked today. Im going to ask them more technical details. Though i suspect my question will be beyond the sales persons knowledge.

the shelving i have in my garage takes up most the wall (which is fine to put batteries on) but has only left space for a single inverter. Regulations here in Australia restrict which wall i can place an inverter on. But also, If im to spend more $$$ id much rather it on capacity, than...

https://www.metabee.com/energy-storage-connector-right-angle-250a-orange-70mm2-unshielded-cable-z-key-id20220700065.html

I found a video showing someone doing it with a batrium kit. A WatchmonCORE + E3 expansion + 4x Cellmate-k9

Ive brought 16 x 280ah liFePO4 cells and a BMS, the trouble is i have a 3 phase supply, and all the 3 phase Hybrid inverters ive found in Australia are for High Voltage batteries, NOT 48v. How can i connect e 48v battery to a HV hybrid inverter? Could i use a simple DC to DC boost converter to...

Solar adoption is huge in Australia. At least 35% of homes have solar now. Maybe thats why. Many of those are state or region specific, not nationally avaliable.

I intended to build a 16s 280A LV battery, but finding it hard to find a 3 phase LV inverter in Australia. I have created a thread about the possibility of using a DC to DC converter to up the battery to high voltage...

How did your project go? Is the 10 * 3.55kWh Pylontech battery up and running will with the GW10KL-ET?

do you happen to know of any? Or where to buy them?

Nice suggestion. Huge expense tho, and a lot of wall space i dont really have.

Good to know it can be done. I didnt know if there would be a limt to the amount to current that can flow through all those batteries. It might not be cheaper, but at least your getting more capacity for your money. would be about 53kw. Im hoping i can get away with a DC to DC boost converter...

All the HV batteries ive been looking at seem to be using lower voltage packs, and hooking them up in series (which also makes each pack safe to work on). I really think we need to move past this HV is "dangerous" mentality, and realise its can be done safely. Im even thinking of putting an RCD...

Im also looking for BMS for HV battery. From looking at other manufactures they seem to put multiple low voltage packs in series, with slave BMS for each pack, and master BMS. Batrium has a solution but its $1700, which in my opinion is too much to pay for a BMS. Im trying to find a supplier on...

i dont think this sounds like a good idea if it cant communicate with HV inverters? but does your battery talk to your inverter? Which inverter do you use? Ok will have a look...

They have to be "type b" to work with DC. Ive already found some here Both batrium and the alibaba seller are using smaller slaves to make up 60s. They just advertise its as "60s. Heres a picture of their 80s using 20s slaves I suspect the master BMS must trigger a disconnect relay for the...

the inverterters ive been looking at wont use the battery unless they can talk to it. (annoying i know)

Just posting this because it looks like the perfect safe way to build a 4x 16s HV battery

Adding this to the thread because it demonstrates all the safety features i mentioned in a HV battery

It doesnt provide overload protection if thats what you mean? you would still need a fuse or DC circuit breaker for that But it absolutely will disconnect the circuit in event of current leakage (through a human), which is the point.

The issue i have is trying to connect a LV battery to a 3 phase system. I cant fit 3x inverter on the wall. I need a single unit that supports 3 phase, low voltage and is approved for grid connect in Australia. I cant find any. So that leaves building a HV battery, but i needed ask see if...

I already have 3 phase power and 20kw pannels running on a NON hybrid grid connected inverter. I of course want to store some of my energy and power myself through the night, and still be up if the grid goes down. I also already have 16x 280ah cells & a BMS, but didnt realise it would be so hard...

Does anyone know what you would need to do to make your DIY powerwall Virtual Power Plant compatible? Does your battery just need to be connected to an approved inverter? I assume the VPP partner is somehow able to log into approved inverters and just tell it to export from battery to grid...

Due to there seemly being no 3 phase low voltage all in one inverter in Australia, im forced to build a high voltage battery, which can be dangerous. So ive been thinking what i can do to make it safer. Here are some thoughts ive had so far; Building 48v packs that are physically isolated from...

What disconnects an RCD is different to what disconnects a circuit breaker. The circuit breaker will break when excess amps build up. eg you short positive to negative by touching the two wires together. An RCD trips because not because the amount of amps, but because their is an imbalance in...

Seems no one has experience with this? Or have i asked this in the wrong section?

i just got quoted $1400 for a system that will do 4x48v in series with a master using heltec equipment. Too expensive Tbh. Still cheaper than batrium at $1700 These HV battery manufactures are surely only paying $350 tops for their BMS. Even though Seplos do DIY 48v kits, they wont sell their...

I was just reading about what type of RCD would be best for High voltage DC. Sounds like Type B is the correct type for batteries. How do you correctly size an RCD for DC? If the max draw was 80amps & the operating voltage range was 180v to 240v DC, what would be the best size RCD? I would...

So there are differnt types of RCDs AC only (type ac) AC + pulsed AC (type a) AC + pulsed DC + Smooth DC (type b) Yes this has to do with the breaking capacity. For example 10kA (10,000amps). If this was exceeded it wouldnt trip. The breaking capacity should be matched to the theoretical...