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Essential vs non essential-Deye


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Posted

Good day,

As the title suggests..

I have my installation of a 8kw deye inverter, 12x 455w plus 2x hubble 5.5 next week Wednesday.

So we need to decide on essentials and non essential.

We have 2 geysers, one for upstairs and one downstairs. The downstairs only used for outbuilding and kitchen( this can be non -ess) the upstairs is bathing...

I have got 2x smart timers so scheduling will be easy.

I want downstairs to only work when PV is available and in excess. Maybe a 10am kick in. Upstairs I would like 8am kick 9am off, then 15h30 kick to 16h30 off.

Question: can " non- essential" still use battery if needed? Eg: upstairs geyser on at 5am to 5h30 on battery.

 

7 answers to this question

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Posted
47 minutes ago, Singh GP said:

Question: can " non- essential" still use battery if needed? Eg: upstairs geyser on at 5am to 5h30 on battery

Yes.

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Posted
1 hour ago, Singh GP said:

I want downstairs to only work when PV is available and in excess. Maybe a 10am kick in. Upstairs I would like 8am kick 9am off, then 15h30 kick to 16h30 off.

Question: can " non- essential" still use battery if needed? Eg: upstairs geyser on at 5am to 5h30 on battery.

What is the rated wattage of these geysers? If you're going to pull 3kw late in the afternoon when solar is dwindling, that's going to deplete your battery some. Also it's 3kw towards the 8kw limit. Might be better to get a lower rated element in the geysers which will mean longer run times but lower peak usage. 

The real answer is that you will need to live with the system for a while and see how the various loads affect it. It's good to be thinking about it up front, but the real proof of the pudding will be in watching when and how quickly it gets eaten.

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Posted

Both answers above are correct - and ideally you don't want to run geysers off a battery. Mine runs off excess solar and on days when there is not enough i run it off Eskom. I have solar export switched on and then i switch on the geyser around mid day to make use of this - most of our usage is done by midday

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Posted

Thanks.

 

Ok confirming, non essential load can be supplied by battery if needed( maybe load shedding or power outages)

I want to use bat at night till about 35% leaving about 15% for load shedding.

My standing consumption is around 600-700w (mainly due the the marine tank)

If I have over 40% bat at 5am 3kw in 30mins is about 1500kwh which should not be too bad.

I bought those astute din switches for the geyser.

 

 

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Posted
21 minutes ago, Singh GP said:

Thanks.

 

Ok confirming, non essential load can be supplied by battery if needed( maybe load shedding or power outages)

I want to use bat at night till about 35% leaving about 15% for load shedding.

My standing consumption is around 600-700w (mainly due the the marine tank)

If I have over 40% bat at 5am 3kw in 30mins is about 1500kwh which should not be too bad.

I bought those astute din switches for the geyser.

 

 

Non essential loads do not have any power when the grid is down so you cannot power them from the battery ...

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Posted
4 hours ago, mzezman said:

Both answers above are correct - and ideally you don't want to run geysers off a battery. Mine runs off excess solar and on days when there is not enough i run it off Eskom. I have solar export switched on and then i switch on the geyser around mid day to make use of this - most of our usage is done by midday

So if the is grid and no solar can 8 run non essentials?

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