1st time post - ? about higher voltages 72.9v

I have been around alternative energy almost 40 yrs. , and was for older systems [ not as old as 40yrs ] but have been using the limit of 48v as a high .
And found a craigslist add with some 425w 72.9v panels .
I was under the impression that generally 48v was where the limit was - not counting panels with mini-inverters mounted on panels .
Have not noticed any gear for higher voltage , maybe because what I have used in the past , hole house RV systems running airconditioning and everything , with 3500watt surge , 2000watt continuous , 600-1000watt total solar .
A little bragging - but to also make the point of correct system design - makes for long battery life - the proof is with the above system mostly no grid , the Trojan L16's lasted over 12 1/2 yrs.
So how much use and how rare of gear to build with 72.9 volt panels .
Thanks John
And found a craigslist add with some 425w 72.9v panels .
I was under the impression that generally 48v was where the limit was - not counting panels with mini-inverters mounted on panels .
Have not noticed any gear for higher voltage , maybe because what I have used in the past , hole house RV systems running airconditioning and everything , with 3500watt surge , 2000watt continuous , 600-1000watt total solar .
A little bragging - but to also make the point of correct system design - makes for long battery life - the proof is with the above system mostly no grid , the Trojan L16's lasted over 12 1/2 yrs.
So how much use and how rare of gear to build with 72.9 volt panels .
Thanks John
Comments
There are many high voltage solar panels around. Either they will be series wired to high voltage and sent to a string inverter or to a MPPT charge controller and stepped down to charge a lower voltage battery bank.
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.
Not sure what or when , had a fire and lost a lot of panels , charge controller etc.
I did repair the inverter , but would like to upgrade that anyway from the Freedom 458 2512 .
Get into pure sine-wave .
Also into ham radio , so to complicate things , trying to get RFI quite .
Also may build a 18650 lithium power wall .
Thanks
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,