October 24, 20232 yr Good evening, I have a 3kw ABB on grid inverter and some used solar panels, I would like to use everything again, given that the inverter has a door for such cases, how do you manage the door? Is it just for charging the battery? must the working hours be set? Is it automatic? Thank you
October 24, 20232 yr 3 hours ago, bibbi1969 said: I have a 3kw ABB on grid inverter What is the ABB inverter model number please advise so we can determine if it is a string inverter. Does this model numbers ring a bell PVI-3.0-TL-OUTD or PVS 300 Edited October 24, 20232 yr by TaliaB
October 25, 20232 yr @bibbi1969 It is a string inverter to generate power when solar input is available. I would suggest you contact a reputable solar installer that is familiar with string inverters. Atrached user manual for tha ABB string inverters. UNO-DM-TL-PLUS-Q_1.2-2.0-3.3-4.0-4.6-5.0_9AKK107046A8889_EN_Rev_A.pdf
October 25, 20232 yr Author thanks for the manual, the problem with the ABB inverter is that it needs a reference voltage and I don't know if the DEYE gen port can satisfy this thing,
October 25, 20232 yr The Deye can presumably, like the Sunsynk have the Aux port confirgured for micro inverter input, which means it should provide 220/230V at the port, but severely limiting the power it will provide, it will then consume power from the port and limit the power provided by ramping up or down the frequency, depending on the power that can be consumed...
October 25, 20232 yr I have an ABB 5kw UNO running through my Deye 8 Aux port. The ABB is seen as exactly the same as a micro-inverter. It' AC power coming in at ranging kw' depending on ABB power production. The DEYE / Sunsynk provides reference voltage to the ABB. The ABB's ability to handle riso matching is more powerful than Sunsynk / Deye so the ABB will synk very quickly to Deye Sunsynk Aux port. What you want to do works BUT it also has limitations that you need to understand. 1. Deye/Sunsynk will use the ABB to charge batteries. It uses a relay to open close aux port depending on your settings. Typically 30% to max 90%. Never go above 90% - EVER. 2. Latest Deye / Sunsynk firmware allows grid always on for Aux port running in micro inverter mode. This is temperamental at the moment and would only apply if you are feeding power back to grid. When loadshedding kicks in the Deye / Sunsynk can give an error and shut down. The reason for this is it takes the Aux port relay up to a minute to activate. Sell back to grid has to stop instantly in event of grid failure and the inverter seems to battle with this (newer firmware may fix in future). Putting the ABB to Aux port or leaving it upstream is therefore a USE BY USE case scenario. I.E. What do you want for your specific needs? If you are selling to the grid, leave ABB as GT upstream. ABB will be permanently on giving best ROI and will only be off during loadshedding. If Deye Sunsynk does use grid power, it will ultimately be using ABB power indirectly. If you want extra grunt to charge batteries faster and leave Deye Sunsynk panels to power house loads, then go through Aux port- being aware that when batteries hit 90% your ABB is turned off and you get no further use out of it. This scenario is more used in permanent stage 6 up scenario or off grid scenarios. NB: the Deye / Sunsynk must have CT clamp fitted upstream of mains breaker for any of this to work. Monitoring: Solar-assistant.io can monitor both inverters in this setup, but ABB is monitored indirectly via Aux power or CT clamp depending on your decision on how you integrate. Option (if you are using a sparkie who properly understands changeover switches.) You can fit a secondary change over to flip ABB between standard grid tie to main DB and Aux port. Not many have played with this. The issue here is neutral bonding and for 99% of people, the cost is simply not worth it.
October 25, 20232 yr Forgot. Since the ABB is charging batteries, never push more power to the Deye / Sunsynk from the ABB than batteries can take (hence 90% limit as most BMS throttle at this point). My batteries can take 4kw up to 90% so I removed 2kw of panels from my ABB to keep batteries safe. Deye / Sunsynk cannot limit micro inverter input power and this is a risk.
October 25, 20232 yr Author Thanks Endy, your answer contains everything I was looking for (a lot of irons in the fire), I need to understand how to best use ABB panels and inverters, the certain thing is that I can think of assembling everything. Thanks for now
October 30, 20232 yr Author Hi Endy, I'm moving towards a USE BY USE system, it seems the simplest one in terms of configuration and also security towards the network, I wanted to ask you but limiting the ABB current with a CT without reselling the current would come into play conflict with the AT of the inverter? I wanted to configure the inverter to work with batteries and solar powering only the backup load in the event of a grid blackout and add an ATS for: 1) the DEYE inverter does not work, switch the system to the mains and use the ABB 2) if the network blacks out, the switching remains on DEYE (no entry into the network) and ABB switches off (safety for operators) what do you think? Thank you
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