Sammyigt

I I can confirm this is 100% correct. Just had the issue now on a site and one inverter was at 230v and the rest at 220v Adjusting them all to the same voltage solved the fault.

I came across a post here the other day where someone asked about the fact of requiring a second DB box for essential loads (ie not having a dual supply and splitting circuits in the same DB box). Ive heard many electricians mention this as well. This is not actually necessary. The only time this would be required is if there is not enough space in your existing DB to accomodate the additional main breaker and RCD. Please note however the following requirements from the image attached.

We've installed probably close to 100 of these units in the last 7 months or so. Out of box failure rate so far at 0%. In the past 7 months we've had a total failure rate of around 3% (one was a parallel system where only one went so true failure rate rather around 1%). So, while a pretty reliable and stable inverter for its cost, there are a few design flaws that im not to fond of but again for what they cost they are i believe the best value for money inverter on the market at the moment. Local support is fantastic, mostly depending on your suppplier but even support from the community is great. I will conclude with this though, i am looking at moving in to starting my own solar installation business, i however will not be including these inverters on my list and will only be doing Victron systems.

Inverter is running in off grid configuration so no on grid loads exist. It's a minimal amount (like i said, around 200w) so you wont notice this on a spinning disc meter. But have three of these in parallel, all of a sudden it becomes 600w. Even with zero export set to 0w it still consumes the 200w. I recall somewhere that SunSynk prefer to use an energy meter rather than the actual CT clamp provided with the inverter. Most likely due to the effectiveness of the CT clamp?

Hi guys If any of you are familiar with the SunSynk / Deye range of inverters you will surely have come across the fact that while grid suppply is available they have a constant draw from the grid of around 200w which i figure is the power used to keeo the inverter on. I consider this a bit of a design flaw and dont understand why they cant use PV power during the day as there own power source. It doesn't display on the inverter as a load (grid power in will read 0w (or around 20w depending on how much you have your zero export power set to) but a clamp meter on the incoming supply will tell you a different story. Now, when the invertee switches to island mode naturally grid input does drop to zero and the inverter becomes self sustainable and independent from the grid. So my question is, has anyone had any success in achieving a true zero import from grid while grid is available? My ideas at the moment are a bit outrageous and far fetched but wanted to see if anyone else has come across this and has a simple solution.

Hi All. Can anyone supply the firmware update for a Growatt SPF5000TL HVM-WPV? If so please email it to me? [email protected]

Wekkit has hit the nail on the head here. Grounding of any exposed metal part is not only a safety factory but it is also the law. PV panels do also need to be earthed individually using an earth cable of equal or greater diameter to that of your DC PV cable, from there a 16mm earth cable needs to run outside the building to an array of Earth spikes.

Yes, each inverter runs with it's own independent panels. So they're not sharing at all. Even with no PV connected at all when the inverter powers up the voltage steadily increases on the PV terminals on the one inverter. With PV connected if the PV breaker is turned on it immediately blows the SPD on that string. As you mentioned though, I'm also struggling to understand how the one could cause any damage to the other (the one with the 09 error)? What really confuses me though is that this was a working system, all that happened was the Growatts were swapped out for the Growcol inverters.

Hi guys Installed to of the new Growcol inverters today (they're still pretty much a Growatt or Axpert underneath). They were swapped out for two existing Growatts, a BMV700 and Pi was installed to create comms from a Revov battery bank to the inverter (using ICC). When switching on (it was after dark already) everything seemed to come as normal, a few seconds later one the PV surge protectors blew. Then almost immediately after the AC breakers supplying the inverters tripped. Afterwards, trying to power each one up individually inverter 1 gives an error 09 (bus soft start failed I believe). Inverter 2 powers up normal but for some reason is feeding power back on the PV input. With no PV connected the voltage on the PV input keeps climbing. Any ideas?

Yeah I'm aware of the 25a discharge current on the battery. I was just not sure about running an additional inverter as a DC load on the battery but thanks for clearing up

So I'm looking to provide probably the cheapest solution. As mentioned there is a Goodwe 4.6 ES currently with 2 x us2000 Pylontechs so comms for true SOC exist between those two. Additional batteries will be added to this as well to prevent the batteries from overloading. Can I use an Axpert inverter (or are there better alternatives for a +/- 5kw battery inverter?) for the additional load? I know they get their SOC info from the voltage of battery so they will need to be told to stop discharging at around 47.5v? The Axpert will as mentioned have nothing to with charging the batteries and wont be discharging them in the evenings, it will remain in bypass mode unless there is grid failure (so this will allow the Goodwe to continue running in self use mode without hindrance from the Axpert.

Hey guys, Is it possible to run two independant inverters from the same battery bank? The situation is there is an existing Goodwe 4.6kw inverter installed but client wants additional circuits added to the backup (circuits which would overload the backup output), is it possible to now add an additional inverter (perhaps like an Axpert?) to the battery bank to supply these additional loads? So basically the DB board would be split in to 3 (on grid loads, backup loads on Goodwe and backup loads on the additional inverter). Now, the additional inverter will have nothing to do with the PV or charging of batteries it will exist purely to supply the additional loads with backup power in the event of grid failure.

Cost. Those infinisolar inverters are expensive... I have no idea why though to be honest. You can install a Goodwe ES for less than an Infinisolar

Anyone know or tried to see if this same connection works with Growatt / Shoto batteries?

Great, Thanks guys!