GROWATT SPH 3600 TL. No battery isolation switch

Post Reply
ALAN/ALAN D

GROWATT SPH 3600 TL. No battery isolation switch

#1

Post by ALAN/ALAN D »

Next door has had a system installed.
The drawing the company that installed it shows a D.C. Isolation switch is fitted between the batteries and the inverter.
The Growatt installation manual shows a switch fitted between
battery and the inverter.

No switch has been fitted.

The technical department of the installer company says that one is not required.
They say the D.C. Isolation switch for the P.V. Panels also isolates the battery. ????????????? :oops: :oops: :oops: :oops: :oops: :oops:

The technical department CANT BE WRONG. ?????? :roll: :roll: :roll: :roll: :roll:

Any one else got a GROWATT SPH 3600TL with no battery isolation switch fitted. ?
User avatar
Windbag
Posts: 78
Joined: Sat Apr 08, 2023 8:18 am

Re: GROWATT SPH 3600 TL. No battery isolation switch

#2

Post by Windbag »

Imo, it's not an OR situation. Surely they both need insolation?
We make 10kw solar 13kw wind, some bread and lots of beer.
We grow & cook loads.
We eat Fibre, Fat & no Fecking barcodes.
We swear at the heat pump (not strictly true)
John_S
Posts: 339
Joined: Wed Jun 02, 2021 10:03 am
Location: West London

Re: GROWATT SPH 3600 TL. No battery isolation switch

#3

Post by John_S »

Looking at this, PDF page 5, document page 4
https://www.ginverter.com/upload/file/S ... 202212.pdf
manufacturer's instruction's require a breaker switch.

Also, it was not supplied per the quote.

The technical departments thoughts are therefore irrelevant.

More relevant questions are, should there be two switches, one near to the inverter and a second near the battery, and whether they should be isolation switches, ie switching off when there is no load, or breaker switches, ie switching off (without arcing) when there is maximum load.
sharpener
Posts: 357
Joined: Fri May 20, 2022 10:42 am

Re: GROWATT SPH 3600 TL. No battery isolation switch

#4

Post by sharpener »

IIRC a battery isolator is also required by the IET Code of Practice. And this is incorporated by reference in the MCS Standard and also I think in the Part P regulations. So the customer can threaten reporting the installer to the MCS (toothless!) and also Building Control.

Mine is combined with a DC breaker built into the BMS module atop the battery stack otherwise I would have fitted a big rotary one.
16 x 230W Upsolar panels in S Devon, ~3.9 MWh/year
8 x 405W Longi panels, 3.355 MWh/yr projected
Victron MultiPlus II-GX 48/5000/70-50 with 250/60 MPPT
3 x Pylontec 3.55 kWh Force-L2
zappi 7kW EV charger
Villavent whole-house MVHR
5000l rainwater system
Post Reply