Miss matched solar panel's

[molly 2]

I have a similar situation, using different make panels in parallel the actually output doesn't agree with the theoretical output at all.

Are you charging a power station

 

[merl]

The input puts in max watts irrelevant of state of charge

No, that can't happen. Power needs to go SOMEWHERE so the charger regulates the amount of power going to the battery. The BMS is there to protect the battery from overcharge should the charger fail to do it's job correctly.

 

[yeoblade]

Are you charging a power station

No, into SLA Batteries

 

[merl]

No, that can't happen. Power needs to go SOMEWHERE so the charger regulates the amount of power going to the battery. The BMS is there to protect the battery from overcharge should the charger fail to do it's job correctly.

Looking back over my post I realise it's probably misleading. When I said "power has to go somewhere" I meant power has to go somewhere while there's actually panel current flowing. So the BMS or charger cannot cut off current flow to the battery and leave the panels still supplying current.
I think what you were eluding to was the perceived 'all or nothing' charge profile of lifepo4 whereby supposedly the battery accepts full current continuously until a set voltage threshold is reached and then current stops completely, although there's a sharper 'heel' WRT cutoff in lifepo4 than lead acid there still remains a short absorption phase with lifepo4 where the charge 'set' voltage is reached but current will diminish as it accepts additional current, this is due to internal battery resistance and forces needed to drive the charging chemistry. So yes it's possible that the unusual figures you posted may have been caused by the different available currents available to the charger when the battery was nearly but not quite full.

 

[marchie]

I hope that the Miss who was matching the Solar Panels was a qualified Physics Teacher ...

Steve

 

[Trotter]

So as to avoid a situation like this, I fitted a second mppt.
The permanent 500w has a Victron mppt, and the folding 200w Bluetti has its own, for when required when on site.
Works well with zero conflict.

 

[molly 2]

So as to avoid a situation like this, I fitted a second mppt.
The permanent 500w has a Victron mppt, and the folding 200w Bluetti has its own, for when required when on site.
Works well with zero conflict.

I can plug my 200 w portable into to my bluetti or my leisure think we are on the same page

 

[Geek]

It is a power station built in 500 w mppt Controller.

There are two sorts of MPPT controller.
The good ones have a processor, a big inductor and complex electronics to find and operate at the maximum power point.
The other ones are PWM controllers with an MPPT label on them.
If yours is the former, why is it behaving as the latter?

 

[molly 2]

There are two sorts of MPPT controller.
The good ones have a processor, a big inductor and complex electronics to find and operate at the maximum power point.
The other ones are PWM controllers with an MPPT label on them.
If yours is the former, why is it behaving as the latter?

The manufacturer spec states it has an mppt controller , that's good enough for me ,

 

[wildebus]

I have four panels on my roof two View attachment 144115120w and two 45w.
Although their max rated output is only 330w I have achieved up to 360w whilst down south and in the north of Scotland this year I have managed 295w.
And the two larger panels are mono crystalline, whilst the two smaller ones are poly crystalline.

I have a similar setup with multiple panels of two different sizes, going to the one controller.

Mine is 9 separate panels - 3 panels of 90W each and 6 panels of 30W each, giving a theoretical maximum of 450W (actually mathematically will be slightly lower due to voltage difference - I think from memory it worked out as 440W?).
My maximum wattage in the last month peaked at 408W, which represents 93% of the mathematical maximum, which is not bad for a flat solar array in Scotland.

Also, you mentioned you got upto 360W on your 330W array? The quoted max power for a panel is based on a specific solar irradiation formula and so in certain circumstances it is very possible for that power to be exceeded, but it doesn't tend to start to happen until you are much father south - In Europe, more like Southern Spain and Turkey rather than the English South Coast .
However .... Victron tend to under-quote the achievable rated power output of their panels so you are far more likely to see a >100% Power output then with most other brands. I've occasionally hit >100% with my Victron Array even up here and I think you are all Victron Panels as well?