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House and Home DIY Everything at home. Building, Renovating, DIY, green initiatives, mowing the lawn. Anything goes |
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If you have permission to connect 4kW it does not mean that you can install more when you feel like and just limit export to 4kW or less. You still need to apply for connecting more equipment each time you connect anything extra highlighting any proposals how you will limit the export. Usually it is just a wiring diagram showing metering device connected to inverter and if it's TYPE tested inverter just giving them the inverter make and model and stating that it will be configured in inverter settings. Do you know what inverter you have? Quote:
With DC charger and 3/4 different systems you might have some issues with them talking to each other and working nicely together and not yoyoing up and down trying trying to adjust. Ideally you would need some kind of central control unit that makes decisions and sends instructions to each device, this could be local or cloud based but it might be difficult if they are not from the same manufacturer. When I was 1st looking Victron range looked promising with local gateway that you can connect all your controllers to. At the end for simplicity and tidier installation I went with single unit hybrid solar/battery inverter, charger and battery enclosure and batteries. This is what I got but the demand has gone up since and it's harder to get them now with either out of stock or long waiting times and price has gone up by about 20% as well https://www.itstechnologies.shop/col...ttery-98-d-o-d the picture on this link shows older model but they shipped the latest version which you can see here https://www.fox-ess.com/all-in-one/ I think what I would do is connect hydro permanently to mains without any limitation as it cannot exceed your limit. If your solar inverter support limitation use meter or CT clamp to measure incoming/outgoing from grid and set limit to 4kW or less. Then use AC coupled battery storage with meter or CT clamp and it will take care of itself, when it will see export and battery not full it will adjust battery charge power automatically to keep export close to 0. If the battery is full and stops charging the power will go to grid if the inverter sees that you are getting close to export limit it will reduce generation. When it will see import and battery not below discharge limit it will generate electricity to keep your import close to 0. It will always try to keep import/export as low as possible. with AC storage you don't need your devices to talk to each other you just need import/export data from meter or CT clamp. If your current inverter does not support limitation you could either replace inverter with the one that does and get AC coupled storage or replace it with hybrid solar/battery inverter with integrated charger. With the AC coupled charger or hybrid inverter/charger you also have option to charge the battery from grid during night when electricity is cheaper and then use during day when it is more expensive but you will probably not need it if you are looking to generate 1000W+ hydro in winter Instead of limiting what inverter generates you could chose to divert extra generation to heating but in winter when you need heating most you are unlikely to have much excess generation and if you are just going to heat water during summer I am not sure it's worth it. I just chose to charge car with excess power. It may involve a bit of planning ahead for example if I see good weather ahead but will not be at home at the time I may chose to charge car from the battery and then let the battery recharge when sun comes out.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
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