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For those interested in AC coupling between Victron and Enphase micro inverters, there is a specific lesson from Enphase Energy Services here: Enphase AC-Coupled to Victron Multiplus-ii or Quattro 20230517 The main points of this lesson are: 1) in AC-coupled systems, IQ7A Micro inverters are...

Hi, to complete the info in this apparently hot and flame-prone topic, there is a good YT video from Off Grid Garage, Andy from Australia, that shows that micro-inverters can definetely work with Victron Multiplus in off-grid configuration. This is the info I asked for in the beginning. The...

I will accept the advice that I can understand clearly. SUMMARY UNTIL NOW From the discussion done until now, it seems is unsafe to rely on any self-limitation in power generated from the micro-inverter. If this is the situation, and given my plant is offgrid and cannot send the excess AC...

Battery are in common, such as the solar chargers and the PV plant. The two inverter are simply two loads taking DC power from same battery pool, i do not see any problem in this. The AC circuit of the two houses are completely independent, and both houses have an ATS: they are 100% offgrid or...

No grid tied inverter can raise the voltage beyond 253V AC, that is 230V + 10%. At 253V AC the GTI will shut down automatically.

My plant is offgrid, with ATS to get back to grid if batteries are below 10%. So all regulations for grid-tied plants are not applicable in my case. If I install microinverters, they are certainly compatible with grid backfeeding, up to 800W in Italy, without need to install a utility...

Both houses will have ATS Automatic Transfer Switches: so the load will be 100% offgrid or 100% ongrid. This will eliminate any issue with public grid operators.

In grid-tied systems the excess power goes to the grid, eventually being/not being paid by the utility. In offgrid system, you need to set a max voltage allowed to the micro-inverter to raise the voltage. If the isalnding inverter is set to 230V, an acceptable limit could be to raise to 240V...

@sunshine_eggo Thank you for the precious suggestion. From what you say, it seems I have to configure a Victron ESS (Energy Storage Assistant) for everything in this AC Coupling to work smootly. This would oblige me to buy a Cerbo GX to access VRM and configure the ESS. But I am not sure this...

Hi , i want to extend somewhat the capacity of the PV plant, with a remote group of panels located far away from main PV string and the plant core with 25kWh batteries, hybrid inverter and MPPT chargers. Main plant has 8kW of panels and uses Victron 150/70 and Morningstar Tristar MPPT 150/60 as...

Hi, this is the aspect and brightness of the Junctek display after 53 meter of extension cable.

Hi energy mates, my PV plant and batteries is located in a garage, far away from the home. I decided to install a KG-160F to measure battery current/voltage and SOC, but it does not make sense to have the display in the garage. So I decided to try a long cable run to connect the measuring box...

I see in the other thread that the solution is using fast acting T-class fuses in all parallel battery branches. Are these "T-class" auto-resettable fuses (current limiters), or need to be changed if they fire for some reason ? Thank you all for the found solution allowing to use the JK in...

BTW, i want to use JK BMS for the active balancing function, and not happy it cannot (?) be used in parallel configuration.

The intent is simple: with 20 kW of inverter, you need to supply up to 400A continuous and 800A surge @48vdc to reach the rated power. Practical LFP batteries have 280Ah capacity or less, and for longevity reasons should not be dischardeg beyond 0.5C that is 140A each. This means that to run...

Hi all. I am designing a multi-house solar PV system, where multiple (2 to 8) DIY LFP 48V battery banks working in parallel. This multi-string battery will have capacity in the 25-100 kWh and feed multiple 48VDC inverters, even of different type and power. Some of the inverters will have also a...

I plan to build a large battery bank in the 36kWh to 96 kWh @ 48V, made of 3 to 8 equal banks of circa 12kWh/each. Each bank is made of 16x EVE LF230Ah battery, using JK BMS 2A active balancer, 200A nominal current for each bank. The big battery will serve two houses, with 2x Voltronic Axpert...

A power supply with iron transformer is a good example of inductive load ...

It is possible that Andy was powering an inductive load at > 200A when one of the MOSFET blew. This will produce a voltage spike going well after the nominal 48V, and possibly beyond 100V which is the rating limit of the MOSFETs used. This phenomenon is controllable via some sort of spike...