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What happens when the clocks change affecting my home batteries?

 
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Energy Storage
Last Post by AgentGeorge 3 weeks ago
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 AgentGeorge
(@agentgeorge)
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Joined: 1 year ago
Posts: 170
Topic starter 29/03/2026 11:56 am   [#2917]

Last night we changed to BST

Just checked my battery and it didnt start charging till 5am as it hasnt noticed the time change

Is there a way to get this to change or are we stuck with manual changing every 6 months

I have a growatt inverter battery charger


This topic was modified 4 weeks ago by Mars

   
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 ChandyKris
(@chandykris)
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Posts: 169
29/03/2026 2:23 pm  

@agentgeorge We have a Growatt battery system as well, and unfortunately I have had to change the inverter time when clock changes. Funnily enough when I go on the app to change the time it shows me the correct time in the prompt, but doesn't automatically change. We are on Octopus Go, and when I went to change at 6 am today, it was still importing from the grid but our off-peak time ends at 5:30 am. I guess I could have set the charging period to run from 12:30 am.to 04:30 am yesterday night so that it would have stopped before peak prices started today.


16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Bosch Induction Hob
Pod Point Solo 3 charger


   
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 AgentGeorge
(@agentgeorge)
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Topic starter 29/03/2026 2:45 pm  

@chandykris ill have to contact my installer, they did something last october and the time synced, maybe a remote update

For now ive reset the time on the growatt

it does require you to know the secret growatt password lol

 



   
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Mars
 Mars
(@editor)
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29/03/2026 3:16 pm  

Really surprised that Internet connected devices don't just do this automatically. Not a battery, but we do have a robot vacuum, and it hates daylight savings, so it's a manual adjustment to schedules today. Thankfully everything else in our house just switches over, but so surprised that batteries, that avail of time of use tariffs, don't do this automatically.


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 ChandyKris
(@chandykris)
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Posts: 169
29/03/2026 5:12 pm  

@editor The Shine app is a bit basic and has this issue with time when clock changes. Other than that, it's a pretty solid product. Even the roundtrip efficiency including the standalone consumption is decent. In peak winter, we operate in the 10% to 100% range, so it charges about 11.7 kWh and discharges back about 10.7 kWh for the house load. Expansion was also pretty easy when we doubled the capacity.

We have an AC coupled system, so have a Solax solar inverter, and that seems to automatically set the correct time in the charts after clock changes. 


This post was modified 4 weeks ago by ChandyKris

16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Bosch Induction Hob
Pod Point Solo 3 charger


   
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 AgentGeorge
(@agentgeorge)
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Joined: 1 year ago
Posts: 170
Topic starter 29/03/2026 7:27 pm  

@editor its not the battery that has the issue, its the growatt 5000 battery charger/inverter.

it is internet connected but needs a prompt to change to BST.

ill call the installers tomorrow as they have installed many systems and likely know it better than us mortals

i had an issue with an OTA update to the inverter last year that stopped the wifi dongle working.if they'd told me it was that dodgy id have run a network point to the inverter.



   
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 AgentGeorge
(@agentgeorge)
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Topic starter 29/03/2026 7:29 pm  

@chandykris you mentioned doubling the capacity

i looked at that and it appeared as simple as getting another 5kW brick and plugging it on top, first taking account of the load balance between the 2 batteries.

Did you source your own battery and install it, id like to do the job myself as it looks ok for a DIY electrical bod like me



   
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 ChandyKris
(@chandykris)
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Joined: 2 years ago
Posts: 169
29/03/2026 8:46 pm  

@agentgeorge We have the 6.5 kWh GBLI 6532 model, so it isn't the modular stackable option like the APX or AXE models. This model was going out of production, so our installer sourced it from somewhere for a reasonable price. But he did mention that the AXE battery packs can be added to the existing 13kWh bank as addon if needed in the future.

The process looked straightforward, but fitting the battery on the garage wall and getting it up and running is way beyond my DIY abilities! But the stackable ones look easy and can see it work for a competent DIYer.


This post was modified 4 weeks ago 2 times by ChandyKris

16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Bosch Induction Hob
Pod Point Solo 3 charger


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Joined: 4 years ago
Posts: 1760
30/03/2026 3:54 pm  

@agentgeorge, @chandykris, do either of you run Home Assistant?


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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 AgentGeorge
(@agentgeorge)
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Joined: 1 year ago
Posts: 170
Topic starter 30/03/2026 4:56 pm  

@majordennisbloodnok i dont, i was looking at doing it, but im in middle of renovations and need to build the new staircase and batton snd insulate all the exterior walls to reduce heat loss value

is it an easy installation and setup process, on a pc, or raspberrypi?



   
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 ChandyKris
(@chandykris)
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Joined: 2 years ago
Posts: 169
30/03/2026 5:28 pm  

@majordennisbloodnok Haven't dabbled with HA yet. But depending on the usecase, could be a summer project in the making!


16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Bosch Induction Hob
Pod Point Solo 3 charger


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1760
30/03/2026 10:39 pm  

@chandykris, the use case is simple; Growatt is decent enough kit but the app and web portal are dreadful. Local management of the inverter allows the hardware to take its proper place at the heart of a renewable energy smart home and Home Assistant is a readily available tool to do it.

@agentgeorge, how easy it is to implement HA depends on a couple of choices as to how you do it and your appetite for a bit of tinkering. HA itself can be easy to get started with, but getting the Growatt inverter connected is a step up. It’s eminently possible - I’ve done it and written about it on this forum - but it’s not plug and play.

If the only problem needing to be solved is daylight savings, HA is overkill. However, if you start using HA for other reasons and do your scheduling there rather than in the Shine app, the daylight savings issue will cease as an incidental benefit since HA handles that kind of stuff properly.


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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