Very impressive system, I see you have built your own bus bar system rather than use a Victron Energy Lynx, how did you get on building your own bus bar and protection devices?
Yes i did, in the top small grey box are just switches to disconnect pv and there is a second small box with overvoltage/overcurrent protection units for every pv string (that box is not in the picture)
The middle one is the fuse box with midifuses and holders for the mppt in and ouputs these are then connected to the main busbar in the big grey box
In the big grey box are the main fuses, 3 for the multiplusses and 3 for the pylontechs and the busbar for the whole system
Also there are 3 switches to disconnect the batterys
Not in the picture: 2 emergency stop buttons to turn off the complete system including the batterys
One is in the ESS room (that room is only accesible from the outside) and one is in the main house distributor in the room next door
Nice system !
Like the Pylon masks… From where did you get them?
But… You didn’t followed the rules for cooling…
No offense, just saying… Many don’t follow this Victron recommendation.
For MPPTs, manual, page 10, 4.1. Mounting. Observe a minimum clearance of 10cm under and above the solar charger for optimal cooling.
You know that they are using natural convection for cooling and the cooling element is on the back…
And considering that the MPPT itself has 13cm in height, you should have a gap of similar size between MPPTs and grey thingys.
Hy Marc, Zou ik je systeem eens mogen komen bekijken en vragen naar je ervaring. Ben zelf ook aan het orienteren, woon ook in bleiswijk en electrical engineer… zou top zijn! bedankt
Hey @DuivertNL, nice system! Out of curiosity. How accurate did the MPPT calculator on the Victron website predict your pv generation and how does it compare with your real world results?
How many months a year can you be ‘off grid’ without importing from the grid? Do you cook and heat your house on gas?
Hi i did not use the calculator, i choose one by myself but only on specs
So no prediction on pv production, because you can use a location but not angle and direction as far as i know in the calculator
Im not fully off grid, ESS always needs grid to balance, but on average i can use pv/battery from mid/end feb or begin march to avout begin/ half november
I have a gas connection but only partly for heating/shower, we also have solar water heating
And we use ac and also partly electric heating, cooking is also electric
We have a fairly large house (180m2) ,
average yearly gas usage in NL is 1500m3, ours is about 400m3
Average yearly kwh in NL is 3000kwh, ours is about 650kwh
We could get more kwh out of the system but i like to keep about 30-40% soc for grid failure
That’s pretty impressive. I wouldn’t have thought you can run electric cooking plus the rest of the house on 3x3kVA MP2. Most people seem to run 3x5kVA or even 3x8kVA to maximise the 3x 25A house connection. I guess that depends also if you an electric car that needs charging.
a few centimeters