October 1, 20232 yr Help needed with a setup we heard of. The household load is divided into essential and non-essential items. Two groups are then divided between two batteries, i e one battery for essentials, one battery for non-essentials. Apparently this is much cheaper than how it is done at the moment. What do you need for this setup and how is it done? Also: possible cost. Thank you!
October 2, 20232 yr Help needed with a setup we heard of. The household load is divided into essential and non-essential items. Two groups are then divided between two batteries, i e one battery for essentials, one battery for non-essentials. Apparently this is much cheaper than how it is done at the moment. What do you need for this setup and how is it done? Also: possible cost. Thank you! I personally have not heard of it being done this way. In my mind if it is done this way, your non-essentials side would need a massive battery or bank and this can get very expensive. Non-essentials normally refers to items like geyser, stove, pool-pump Essentials normally refers to lights, tv, routers and some small kitchen appliances etc The setup you describe does not sound right to me. Maybe some of the installers who have done this for clients can come along and enlighten us all
October 2, 20232 yr I think there is a misunderstanding. Normally the DB is split into essential and non-essential. The inverter will feed both but is fed from 1 battery bank and the same solar panels. So the battery bank is not separated. Where are you based?
October 2, 20232 yr Author I think there is a misunderstanding. Normally the DB is split into essential and non-essential. The inverter will feed both but is fed from 1 battery bank and the same solar panels. So the battery bank is not separated. Where are you based? Good morning! We are in Mossel Bay.
October 2, 20232 yr Help needed with a setup we heard of. The household load is divided into essential and non-essential items. Two groups are then divided between two batteries, i e one battery for essentials, one battery for non-essentials. Apparently this is much cheaper than how it is done at the moment. What do you need for this setup and how is it done? Also: possible cost. Thank you! Why do we split the DB? This is to isolate heavy loads like the geyser, electric ovens, pool pumps that will run your battery down quickly. Having two batteries for the two halves of the DB could work in theory, but I can't see it being cheaper. Batteries are the most expensive part of the system, and you would probably need an inverter for each battery. One inverter is going to detect the loss of mains and start feeding inverted power from a battery to the essential side of the DB, another is going to do the same for the non-essential side. The battery for the non-essential side is going to support some large loads and may have to have a higher capacity. Is it all possible? Yes. Is it going to save money? No.
October 2, 20232 yr I think you need to discuss with the installer and understand exactly and clearly what he is proposing. What you have described here is not impossible but also very unusual and not cheap. So is it possible that (one example) it's a sunsynk or deye inverter, he is proposing running the non-essentials off the programmable aux port on that inverter and is going to add a 2nd battery to give longer backup? Then you'd have two batteries in parallel, connected to one inverter, and some simple parameters set on the inverter. Also why does he propose this? The non-essentials by definition are loads that you can do without for 2 to 4 hours. Let's get clarity about the proposal. Edited October 2, 20232 yr by Bobster.
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