AlexTZA

Hi Jaws. The backfeed from the inverter is something I had not considered, but now that you mention it, it explains quite a few things. I presume the power meter that comes with the Goodwe is used by the inverter to regulate the backfeed so that the inverter can supply the non essential load without feeding back into grid, or at least for very short durations when the load changes dramatically. Is that the gist of it?

Thanks for the feedback which confirms my suspicions. I couldn't find it in the latest user manual but the older version specify it, but this one has it on page 23, but the actual derating curve isn't supplied: http://www.goodsolar.mx/img/Iversores/Manuales/INVERSOR HIBRIDO_Manual 350-00082-02-ES USER MANUAL.pdf

One of my main concerns has to do with temperature rating. If I look at the Pylontech batteries, they are rated for operation over 0-50C during charging which should be fine. However, the design life and cycle life are both specified at 25C. Given I've measure the temperature in my garage at 35C+ in the peak of summer with a hot car in it, my feeling is this is not a good place for these electronics - what have other people's experiences been? Or should I perhaps consider a large extractor in the ceiling in my garage to deal with this? Also the Goodwe temp derating starts at 45C - how quickly/easily does the inverter get near this temperature when under normal operation or high load?

Hi all, I’d greatly appreciate an experience eye cast over the design and electrics of a Goodwe ES 5048 inverter setup I’m planning that includes solar and Pylontech batteries to make sure I’m not doing anything stupid. Firstly, some key challenges and pertinent info: The existing DB board is a cheapy, annoying single row job and is nearly full as it is. I am able to make some space for the Goodwe energy meter by removing a lights timer I have in the board, replacing it with a suitable day/night sensor instead. So I am limited by how many devices I can add to this board without adding a surface mount box which I’d like to avoid if possible. This is located in the garage. If necessary, I could move some load breakers, such as the geyser for example to the new surface mount DB by the inverter. I am not totally decided as to the inverter location so some input here would be appreciated. The garage is not the most spacious around the edges and I don’t like the fact I have to put the Pylon’s on the floor where it’s likely to get in the way. Also as garages are, it gets a bit dusty and cob-webby over time, and as it has a metal door facing east, it gets pretty toasty in there in the mornings in summer. Maybe I’m being a bit OCD about this, but this doesn’t seem like the ideal place for the Pylon’s. I have an alternate location in a fairly large built-in cupboard inside the house. The cupboard would be easy to amend with a vent and a quiet 10cm ceiling extractor to assist with airflow. It is however, about 25m away from the distribution board by the way of cable run. To keep things simple I’d prefer to simply attach all the existing loads directly to the inverter output. I believe my energy consumption would allow for that (typically 200-230kWh/month, peak according to efergy meter has been 9kW once in the last 5 months). If I really ran into problems, I could move the stove/geyser from the inverter output. I have 255V coming out of my wall sockets which is just a “feature” of my complex’s feed transformer. I believe the Goodwe can handle up to 270V. Thus, based on the Goodwe manual and other research I have the following basic electrical layout in mind (see Word art below). I haven’t included details such as the fuses and other components on the solar/battery side. My main questions would be: Is my plan sound? If I understand the specs in the Goodwe manual, which isn’t all that clear on the matter, it appears it can supply up to ~9.2kVA from mains as pass-through power if required. Not sure if inverter backup power can be added to this total if necessary. I understand that if power fails I’m limited to the Goodwe’s backup output of 4.6kW but I think that would be easy enough to self-manage around. The wiring from the main DB to the inverter would require 16mm^2 cable in both directions if I am correct. Not cheap, but I’d rather put in the full size cable than down-rate the breakers. How large does the earth wire need to be that runs between the DBs? Is putting the inverter in a cupboard a dumb idea or should I just leave it in the garage?