which is starting to become available (for pre-order) in Germany
It specifies an MPPT voltage range of 64V–450V and a start-up voltage of 120V. It’s precisely this latter value that concerns me, as I’m currently at 80V and don’t want to move to 120V (minimum).
Do you have any information about the possibility of lowering the start-up voltage?
Because if it’s above 120V, in theory a permanent insulation monitor (CPI) is mandatory in France, unless the MPPTs have galvanic isolation, of course?
The RS19 is a MultiRS unit in a 19-inch rack. It therefore has both an insulation monitoring device (IMD) and galvanic isolation between the DC bus and the battery.
I get the impression that he’s talking about the Multi RS Solar 6kVA.
In “Multi RS19 Solar 48/6000/100-450/80”, apart from the 19 and the 80, the rest matches the specifications of the Multi RS Solar. Moreover, the description he gives corresponds to this product, not the new HS19. The Multi RS Solar is nothing new. It’s already been on sale for some time.
@Joe, could you clarify which product you’re talking about?
I am indeed referring to the new 19-inch rack-mounted model.
Thank you for the information about the CPI, as well as the galvanic isolation.
I also have a question regarding the start-up voltage: Do we already know whether this model will be able to start at around 80 V?
Another point: I am currently using 2 strings of two 500 Wp DMEG panels (2×500 Wp).
The problem is the current, which is already reaching 13–14 A, whereas in theory the equipment supports 12 A under normal operating conditions (and 16 A in short circuit).
How would this affect the warranty if the current regularly exceeds 12 A?
Regarding the battery connection:
It appears that the cables are similar to those used with Pylontech batteries.
Does Victron plan to sell the battery connectors required to connect to Victron NG 300 Ah batteries?
And what about the cable cross-sectional area, given that Pylontech recommends 25 mm², which is insufficient for the Victron NG 300 Ah battery?
It’s disappointing; I thought Victron would make an effort to release the RS19 with a higher MPPT input current than for the Multi RS Solar, but no such effort was made.
As for the usable MPPT current limit, it means it won’t draw more than 12A from the panels. In other words, it will throttle the output, so will never you get the maximum output your panels could produce since DMEGC panels are rated around 13.5A impp. But since panels rarely give the maximum of their power it is not really an issue
To me , the possible issue is with the isc current of the panels vs the rating isc current of the mppts
Isc for the mppt is 16A, and your panels are rated 14.2A isc. On the paper it is inferior to the 16A limit, but the best practice is to add a safety factor of 1.25 to the current of the panels, which increases the isc of the panels to around 17.5A
This safety factor is applied because the panels can produce more than the rated isc current when irradiance goes beyond STC values (>1000w/m2)
I am comparing the new Multi RS19 and Multi HS19 for an east-west PV system with 25 AIKO 485 W modules.
AIKO 485 W:
Vmp: 34.3 V
Voc: 40.9 V
Imp: 14.15 A
Isc: 14.88 A
The RS19 supports 16 A Isc but only 12 A operating current and 450 V PV voltage.
The HS19 supports 600 V, which is ideal for 12/13 module strings, but the datasheet specifies only 13.5 A MPPT current and 13.5 A short-circuit current.
Is the HS19 officially compatible with these AIKO modules, or are the current limits a hard restriction?
Which inverter would Victron recommend for this application?
Thank you. Unfortunately, the MPPT Calculator does not include the new Multi HS19 Solar yet.
My question is specifically about the HS19 hardware limits.
The AIKO 485 W modules have an Imp of 14.15 A and an Isc of 14.88 A.
The HS19 datasheet specifies 13.5 A MPPT operating current and 13.5 A short-circuit current.
Does Victron officially approve these modules for use with the HS19, or are these current limits strict hardware limits that make these modules unsuitable?
If its anything like the mppt design in the rs450/100 its a soft limit and the rs450 manual specifically talks about edge cases where you may want to exceed that:
16A operational limit
20A reverse polarity limit
30A short circuit limit (in correct polarity).
Fundamentally assuming you have a 350V string for example the 4kW per tracker limit would limit you to around 11.5A real world anyway, even if you had two parallel strings on the tracker.
You know the hs19 is for high voltage batteries only? 650-1000Volt DC, wich required special switches, fuses, cables, DC connectors, many safety requirements, special battery room…there are not many low voltage DC ESS installers who dare their hands on high voltage ESS systems.
High Voltage ESS systems are for large scale systems with huge battery capacity and over 100 solarpanels, not for the smaller home system.
So it’s absolutely essential to size the PV cable protection fuse correctly.
Personally, in these cases I use Stäubli inline fuses as close as possible to the potential fault source — in other words, the PV panels.
For example, if PV I_SC > 16 A but I_mpp <= 15 A, then use a 15 A inline fuse.
But what does a fuse achieve with a single string or even two parallel strings? My understanding is fusing or breakers per parallel string is only needed once you have three or more strings (as a fault in one string could cause the other two strings to dump their current into it)?
Whereas for single or dual strings the current wont get high enough to blow the fuse.
