Connection of a 24v booster on installation

[Matrue]

Good evening, I need to connect a 24v booster to the PV system already in place, & don't know anything about it! My main fear is to lose the regulator settings.
A friend told me to prepare the 2 ends of the cable, install the 24v female plug, cut at the circuit breaker & connect the + & - wires at the batteries. According to him, if the manipulation does not last long, the regulator should keep its settings in memory.
In this case, the panels remain connected to the regulator, is this harmful for the regulator?

My installation consists of 2x2 panels, 2x2 90 Ah 12V batteries, a Victron pure sine wave regulator, a Victron 800 VA inverter-charger & a monitor.
Do you have advice, guidelines for my handling?

Looking forward ...

[Matrue]

No connoisseurs here ??!

[Christophe]

We are here, we are here

Uh I do not understand your concern: why want to disconnect the existing installation? It is low voltage, there is no physical risk during handling.

So in my opinion, would it suffice that you make a 24V jumper across the terminals of the batteries in series?

Otherwise a little diagram will help us better understand your concerns ...

[Matrue]

Thank you to you for this answer. My first problem is that I don't know anything about it, I only have my great goodwill to get through it, ... & this forum!! I had made a sketch but I have never posted an image yet, so I send it to you by mp, so as not to spend hours there!
This sketch is probably not very "academic" but it is correct, except for the connection of the monitor which I forgot.
My installation was done by someone referenced by Victron, so I don't think it was bad.

So according to you, I can loosen the nuts to add the terminals without cutting the circuit & without damage?

[Christophe]

Ok I will add the sketch if you can send it to me in MP (in fact the procedure is strictly the same whether it is in MP or public)

Yes you can very well loosen battery bolts without damage or cut (as long as the electrical contact remains in contact) to add a jumper.

[Matrue]

2nd try ...

[Christophe]

Ah well here you see it was not so difficult;)

Uh what is the dotted circuit ??

Here you can bridge either in 1 or in 2 following where it is the easiest to bridge (mechanically):



On the other hand the 24V supply for your booster will not be regulated, so you risk overcharging your batteries (therefore premature wear), 3 solutions:

a) put a 24V regulator before your 24V socket
b) use any relay output from the existing regulator
c) use the regulator to converter output if the converter is not diode, i.e. if you can draw current from the batteries from these 2 wires (check in the manual)

[Christophe]

I re-read your 1st message the regulator is a pure sine, therefore solution 3 not possible, because obviously it directly produces 230 V AC in output ???

Otherwise what is the power of your booster and how long do you want to use it per day?

If it is not too important as a use, then a 24V regulator may not be necessary ...

[Matrue]

The black and white dotted line corresponds to 2 threads sheathed in these colors, very fine, a little twisted together, & I would like to know what they are used for!
So, whether the bridging is in 1 or 2, the consumption of the booster would not be regulated, is that correct?
The most convenient is in 1.
The booster is this: http://www.solaris-store.com/953-surpresseur-equipe-avec-pompe-shurflo-5050-2301-g011.html & will serve me at the sink & the shower, an average of 30l / day.
Enttk, thanks for your help!

[Matrue]

I really find it very surprising to be able to fiddle with the connections without breaking the circuit, are you sure of that?