NickNou

Hi there @surajsurya - do you still have of these 8S BMS's available?

Hi there, Are these cells still available?

Hi there. I would be keen on the Logger if it’s still available?

The irony is that these are for my boat, from which I fish… so yes, no line in the water until I can get a pair of batteries on board. I understand that stock is landing soon for Revov’s 12.8V batteries as well. Can one order S120’s direct from Hubble.co.za, and if not where is the best place to Queue?

Hi, Looking for a pair of 100AH 12.8V Lead acid drop ins for a 24V application. It seems like the recent spat of load shedding has pulled everything off the shelves... Does anyone know where I might be able to get stock? TIA

For what its worth, I decided to give GW Store a miss. The Flags: 1) Recent reviews on HelloPeter are clearly fabricated. People give GW Store a 5-star review and within the hour every one of them has, in addition, dropped a stellar review for Megasolar. If you do your homework, you'll see that Megasolar is just a gauze for the scam-antics of GW Store of old. 2) You can't use Payfast for any purchases more than R5k. 3) No Google reviews - for a retailer that's been in business for 5-plus years? Nope...

Hi Jason. I think the use if Payfast does add an additional level of security for hesitant buyers. Depending on your card, you enjoy additional protections and guarantees over that offered by the payment gateway. The use of a payment gateway saved my bacon last month on a purchase of over R20k. I was able to lodge a dispute and push for a charge-back on account of non-delivery (they had stopped stocking the item I purchased, despite the webstore claiming the item was in stock). It took the better part of 3-4 weeks, but I have my ZARs back.

Thank you for the list. EFT-only is a definite red flag. There is a lot to be said for the protections that come with Credit Card payments through recognized and established E-commerce payment channels. Obviously, this does load pricing on the sellers side, which is passed onto the consumer. One could default to the reputable stores 99% of the time, but you always end up looking for something that they don't have in stock at the time.

Morning, Just want to check if anyone has recently had issues dealing with GWStore? A few years back they had a particularly bad rep on the forum - but I gather that things may have changed in the interim. Burnt my fingers recently, so would appreciate any feedback. Nick

Hi there, I'm busy renovating a new pad and have the opportunity to fit a completely new water heating system. I'm keen to install a heat pump, as I've has decent savings from the heating setup at our current house. Split between fitting a traditional HP setup (i.e Alliance or ITS of +- 5kW output) with 200L of storage OR the 200L integrated unit from EMS, which seems to offer a decent efficiencies, simple installation. Does anyone have one of these EMS/Magneto units installed? Looking for informed input/opinions. Thanks!

Electronzoo - Would you be keen to sell the Venus GX and Single phase meter separately?

One could consider this, but most of the local relays that I've had a look at have time delays starting at 0.5 seconds and up. With my current prepaid meter, the trip occurs almost immediately. It would be great if you could dump the spike into a set of immersion heaters or similar.

I'm currently running with 2.08-13. I did see yesterday that the 2.08 is out as a official release. Changelog does indicate that rev 13 includes the change for the 200W fronius zero feed bug. I'll flash with the release version of V2.08 this weekend. I'm not running with a grid meter, and currently make use if the monitoring inside the Quattro itself. The Ecolec 570 was discontinued ages ago. There is little/no documentation available, and all the info I've been able to attain hasn't been of much use. I do know that the Ecolec is fitted with an internal RCD monitoring circuit, where you can configure the earth leakage trip. I thought this might have been the issue, but I saw tonight that the Earth leakage protection on my specific meter is disabled (You can select from OFF, or in the range of 10-300mA I'm going to endevour and have the ECOLEC swapped with a BEC23. Might take forever with my local utility. I've heard from other installers that the BEC23's meters are not that forgiving, so I dont know if I should be considering other options. Nevertheless, you can do alot with a reverse feed trip based on 40W over 15 second window. The Ecolec trips almost instantly (less than a second after I remove the load) and its been a problem here before. This is true. The ESS controller does overshoot, but settles very quickly. Even though I have meter issues, I must say that ESS does have a very well tuned control loop.

Have some more time on my hands to test the ESS system again. PV modulation: Modbus throttling of the Fronius works just fine. With no or little AC load, the Fronius is throttled to very low outputs quite effectively. This works quite well even when disconnected to mains. As a redundancy, I checked how well the frequency shift would work in the event of modbus failure. Victron disconnects from grid connection, and immediately starts with frequency shift modulation, pushing frequency up to around 52.7Hz. Fronius scales back PV output accordingly. No problems here. Reverse power spikes: Still have a problem with this. A typical example of a trip I had this morning: AC load: 3000W Battery discharge - approx 800W into system PV input +- 2150W Grid power - +-150W AC loads drops to 1200W due to large load switching off - Mains drops out on the Pre-paid. This is the major issue I have on the ESS setup. Still looking at the various options I have available. Off-grid Fronius trips: With the grid disconnected, the Fronius disconnects from the Victrons output every 3-5minutes, or each time that a Large-ish load connects or disconnects from the AC-output. All trips are of type 453, and are due to short term voltage variations on the AC line. Will most likely need to change some of the grid tie settings of the Fronius to prevent this.This is not really an issue when the system is running in parallel with the grid, as the mains connection keeps the system voltage stable.

ACDC have the SP510 available, Rhomberg. I don't think this unit would be quick enough to respond to a sudden reverse power feed. You can only set the response delay between 1 and 10 seconds. Measurement is also not that accurate. On a 5A CT you can measure down to 100mA. Say you have a 60/5A CT on the line, you getting a sensitivity of 600mA. Rough maths puts that at around 130W. Not really great. I'm sure a bit of googling will reveal purpose made monitors for this sort of application. Already running the 5kVA Quattro with a maximum inverter limit of 3000W. I think a big factor here is that the PV is being fed directly into the AC -Output by the Fronius. Even if the Victron can react fast enough (i.e in the case where there are charge controllers feeding into the DC bus) and avoid trips, it still needs to absorb the incoming PV from the Fronius, or modulate power over modbus. All this takes (too much) time! Will most likely be be simplest option here. But I need to get feedback on which meters are the most forgiving (Conlog, itron, Landis...etc) in absorbing the occasional reverse power spike. The 15 second window on the conlog BEC23 is workable, as the control loop to regulate the output of the Victron does over and under shoot, as you stated above.