Just a few tips form a few off-grid setups I've seen: It's not worth spending money on batteries for a grid tie inverter because the grid already acts as a big battery and if there's a blackout you will lose the power both from the grid and from the inverter anyway. But you can do what is known as AC-Coupling, power a grid tie inverter from batteries (or any other power source) to add its output to the output of a normal off-grid inverter for which you already have a battery bank, *ask the manufacturer of the off-grid inverter if a grid tie inverter can be connected to its output and of how much power it can be* before doing any experiment that could damage your inverter(s) Also both inverters must have the same input voltage if you want to use the same battery bank for both, if both are connected to the same battery bank the grid tie inverter does not need a low battery disconnect function because the off-grid inverter will already have it and when it shut downs the grid tie inverter automatically as if it was connected to the grid.
Yes, the cost of the batteries is certainly not an element to be underestimated but fortunately many people (me too....) are able to find them for free. These from the test were disassembled by a UPS group and are at 88% of their life.
@@larsbueb137 Yes, but you have to take into account how much electricity you would pay with what the batteries cost. Two 12V 100Ah deep cycle batteries can cost about $500 and at most would store 2.4 kWh but you can't really discharge them 100% without damaging them so you can probably only use about 1.5 kWh without damaging the batteries from over discharge. In some places each kWh from the grid costs 10 cents, with the $500 that batteries capable of giving you 1.5 kWh each night cost you can also pay those 1.5 kWh each night to your utility company for 9 years.
@@ruben_balea here in Germany we pay about 35 (Euro ) cent per kWh from the grid , but anyway for me it is not essential to compare costs per kWh and which or what is cheaper, essential is whats cleaner !
Just a few tips form a few off-grid setups I've seen:
It's not worth spending money on batteries for a grid tie inverter because the grid already acts as a big battery and if there's a blackout you will lose the power both from the grid and from the inverter anyway.
But you can do what is known as AC-Coupling, power a grid tie inverter from batteries (or any other power source) to add its output to the output of a normal off-grid inverter for which you already have a battery bank, *ask the manufacturer of the off-grid inverter if a grid tie inverter can be connected to its output and of how much power it can be* before doing any experiment that could damage your inverter(s)
Also both inverters must have the same input voltage if you want to use the same battery bank for both, if both are connected to the same battery bank the grid tie inverter does not need a low battery disconnect function because the off-grid inverter will already have it and when it shut downs the grid tie inverter automatically as if it was connected to the grid.
Yes, the cost of the batteries is certainly not an element to be underestimated but fortunately many people (me too....) are able to find them for free. These from the test were disassembled by a UPS group and are at 88% of their life.
@@windturbine Now that's a good price! You can't beat it unless someone pays you to take their used batteries and I doubt that will ever happen 😉
well at night the sun does not shine and with the batteries, you still can feed sunlight into your home at midnight ....
@@larsbueb137 Yes, but you have to take into account how much electricity you would pay with what the batteries cost.
Two 12V 100Ah deep cycle batteries can cost about $500 and at most would store 2.4 kWh but you can't really discharge them 100% without damaging them so you can probably only use about 1.5 kWh without damaging the batteries from over discharge.
In some places each kWh from the grid costs 10 cents, with the $500 that batteries capable of giving you 1.5 kWh each night cost you can also pay those 1.5 kWh each night to your utility company for 9 years.
@@ruben_balea here in Germany we pay about 35 (Euro ) cent per kWh from the grid , but anyway for me it is not essential to compare costs per kWh and which or what is cheaper, essential is whats cleaner !
dove posso trovare questo inverter?
eccolo..... a.aliexpress.com/_EGw2UyT