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Growatt 6.5 solar battery

j368
Posts: 25 Forumite

Hi,
I have had the above installed as an addition to solar panels, but was surprised to find that the battery fills up overnight to 100%, so that in the morning - when the sun shines - my battery is already full.
As a newbie to all this it seems a bit daft to me, so I queried it with the supplier and he told me it's to take advantage of a cheap rate at night - but the tariff I'm on doesn't have a cheap rate at night.
So my logic feels that:
I asked my supplier how to do this but he told me to ask my neighbour (who is also a customer and recommended the supplier) !!
This whole installation has been problematic and I think he's 'had enough' of me asking questions
Happy for someone to tell me my supplier has been right to set to 100% overnight - but, please will you explain why?
Thanks
I have had the above installed as an addition to solar panels, but was surprised to find that the battery fills up overnight to 100%, so that in the morning - when the sun shines - my battery is already full.
As a newbie to all this it seems a bit daft to me, so I queried it with the supplier and he told me it's to take advantage of a cheap rate at night - but the tariff I'm on doesn't have a cheap rate at night.
So my logic feels that:
- I'm charging at night costing me x pence / Kwh
- then exporting during the day and earning 'less than x/ Kwh'
which wasn't what I was expecting.
I asked my supplier how to do this but he told me to ask my neighbour (who is also a customer and recommended the supplier) !!
This whole installation has been problematic and I think he's 'had enough' of me asking questions

Happy for someone to tell me my supplier has been right to set to 100% overnight - but, please will you explain why?
Thanks
0
Comments
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Light Renewables? Nice of them to be so helpful. In the app click on the inverter in the middle. which should bring up "Storage" Click on the battery, then "Control" > "TOU-Charging". The password is growattyyyymmdd (as in today's date, but I'm not exactly sure which time zone). Time Period 1 is probably set as enabled 0030-0430 or something like that. Disable it, unless you really want to pay to charge it to 50% every night, but I can't see that you would if the price is the same all day and night.4.7kWp (12 * Hyundai S395VG) facing more or less S + 3.6kW Growatt inverter + 6.5kWh Growatt battery. SE London/Kent. Fitted 03/22 £1,025/kW + battery £24955
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Assuming you get on with your neighbour and they are more proficient at programming the battery is not a bad idea as its probably better to be sown what to do .. You also may want to set up a reserve if you have backup facility over this winter. Also is changinf tariff an option with a battery the saving can be quite good.8kw system spread over 6 roofs , surrounded by trees and in a valley.1
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That's not the company :-) I won't name them as I don't want to annoy them in case the whole thing fails. (Already had one battery die on me and have to be replaced under warranty.)
Anyway I can't find where 'Storage' is at the moment, but I have to work right now, so I'll look harder later. Thanks!1 -
Probably a good idea to get my neighbour round for moral support.
Sadly changing tariff is a whole other saga that I'm trying to get my head round as I can't get my FIT registration released from Scottish Power to go to Octopus - both parties say it's the other party's job. That's been going on for weeks too.0 -
I just guessed it was LR as they'd set it up exactly like that for me. It must be something they all learn at PV Installation School. The destop site's rather different...scroll down to "My Photovoltaic Devices", click "Settings" on the RH side, agree to the disclaimer (Devil gets your soul, standard stuff) edit the settings for "Battery First", put the growattYYYYMMDD password into the "press enter key to save" box and click yes. I think that's the theory but editing on the website won't work for me at the moment, only the app. All very growatt.4.7kWp (12 * Hyundai S395VG) facing more or less S + 3.6kW Growatt inverter + 6.5kWh Growatt battery. SE London/Kent. Fitted 03/22 £1,025/kW + battery £24951
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j368 said:Probably a good idea to get my neighbour round for moral support.
Sadly changing tariff is a whole other saga that I'm trying to get my head round as I can't get my FIT registration released from Scottish Power to go to Octopus - both parties say it's the other party's job. That's been going on for weeks too.
3.995kWP SSW facing. Commissioned 7 July 2011. 24 degree pitch (£3.36 /W).
17 Yingli 235 panels
Sunnyboy 4000TL inverter
Sunny Webox
Solar Immersion installed May 2013, after two Solar Immersion lasting just over the guarantee period replaced with Solic 200... no problems since.
13 Feb 2020 LUX AC 3600 and 3 X Pylon Tech 3.5 kW batteries added...
20 January 2024 Daikin ASHP installed4 -
Officer_Dibble said:I just guessed it was LR as they'd set it up exactly like that for me. It must be something they all learn at PV Installation School. The destop site's rather different...scroll down to "My Photovoltaic Devices", click "Settings" on the RH side, agree to the disclaimer (Devil gets your soul, standard stuff) edit the settings for "Battery First", put the growattYYYYMMDD password into the "press enter key to save" box and click yes. I think that's the theory but editing on the website won't work for me at the moment, only the app. All very growatt.
In fairness to LR, they didn't do that on my install. They said I could charge the battery up at night if I wished, and emailed me the guide on how to do it.
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That's good of them - I should have asked if they could email me a guide on how to undo it!4.7kWp (12 * Hyundai S395VG) facing more or less S + 3.6kW Growatt inverter + 6.5kWh Growatt battery. SE London/Kent. Fitted 03/22 £1,025/kW + battery £24950
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Yeah no need to get fit moved.
My fit is still with edf who I left about 5 years ago.
If you don't have cheap rate, it's nonsensical to charge it at night, that's the companies fault for setting it up that way.
Also you paid them to install the system, so it is uo to them ti set it up right.
Who cares if you are that annoying so and so, you paid them for a service, not to think you are a great person.
They are failing you here, they should be fixing itWest central Scotland
4kw sse since 2014 and 6.6kw wsw / ene split since 2019
24kwh leaf, 75Kwh Tesla and Lux 3600 with 60Kwh storage1 -
powerful_Rogue said:In fairness to LR, they didn't do that on my install. They said I could charge the battery up at night if I wished, and emailed me the guide on how to do it.
I have now set it up for TOU overnight..2
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