The input rating of my inverter is greater than the output.
my solar inverter is going to be a Lux power 5k hybrid.
My panels are 6kw.
The inverter has 8kw input and 5kw output. I will have 4.6kw batteries.
What does this mean in practice - on a sunny day if the panels are running at full power I will be losing 1kw of power?
As a hybrid inverter if i ask the electrician to install an isolation switch will that enable operation without grid tie?
Your inverter is 8 kW so greater than the panels (6 KW) so it can handle all their potential output. NB Most of the time it will be less than that.
5 KW output means the max it can take from the batteries and push into the house is 5 kW (in addition to any solar load).
Your batteries are 4.6 kWh storage.
However, the maximum it can discharge / charge to the batteries will probably be limited by the batteries themselves and not the inverter Eg I have a 10 kWh battery and a neighbour has the same system with a 5 kWh battery. Mine can sink all the solar into the batteries, but his can't and sends some to the grid as the batteries can't take the current. We have the same inverter module. So his system is limited by the batteries (not the inverter).
What am I missing in the input being greater than output?
Is it just so the panels don’t often produce full power so they might not always generate 5kw. But on days they do you don’t want to fry the inverter but the up shot is on those days you lose some as it’s going in faster than coming out?
What am I missing in the input being greater than output?
In a system with batteries the inverter has four different roles.
1. Take DC from the solar panels and convert to ac and dump into the grid (via your consumer unit)
2. Take DC from the panels and regulate to DC to charge the batteries
3. Take DC from the batteries and convert to ac and dump into the grid (via your consumer unit)
4. Take AC from the grid and convert to DC to charge the batteries
Without seeing the data sheet, I suspect that:
The Input value refers to maximum DC it can take from the solar panels and convert to ac (#1 above)
The Output value refers to the maximum DC it can take from the batteries and convert to ac (#3 above)
So the two numbers are describing different modes of operation.
The batteries are uhome lfp 2400. Of which there are two. The spec looks pretty rubbish with 1.5kw charge/discharge so the max they will be able to take is very low and they won’t even run a kettle.
If only these questions had occurred to me earlier!
Is that 1.5 Kw each or the pair? If each, then you get 3 kW combined (if they wire in parallel). If they wire in series, then still 1.5 kW.
Our system seems to cope with up to 4 kWh load from the batteries with a 10 kWh battery (2x 5 kWh in parallel).
here are the tech specs:
battery:
inverter:
so on a sunny day producing 6kw what happens?
I also don’t get how the 5000w ties to the 25amps.
230v x 25 A = 5,750 Watts, so roughly 5 kW.
Looks like you have two batteries in parallel, so should get 3 kW output from them.
Please use The Solar Thread. It's easier to find when people have a similar question/requirement.
It’s easier to find when people have a similar question/requirement.
It's really not!
No one is going to read all 500 posts, they'll just use the search function, which will find it wherever it is....
I can never get the search function to work!
Are you really so clueless at searching @footflaps ? 🙂
You just type < "the solar thread" inverter > into the search and it lists the posts and the first lines of text containing the search term in the thread. No need to dig through 500 posts.
Are you really so clueless at searching @footflaps ? 🙂
I'm not sure you understand how search works, you don't need to specify the thread, it will find it no matter which thread it is in.....
Hence it doesn't matter where you post something....
