Hydro configuration options

[J4501]

Greeting all, I have a possibly odd situation I couldn't find via searching. If I missed something please let me know.

Battery nominal 48vdc. I have several Classic 150's managing solar for the last 5 years. In addition I have a Classic 200 managing a permanent magnet Hipower (homehydro) 800 watt hydroelectric unit. The 200 is in hydro mode, mppt is pinned at 80 volts (per the Hipower manual roughly one half open circuit voltage). The output is 800watts. I have aux-pwm configured on two classics some-tenths of a volt apart providing redundant load diversion to 2 fan cooled SSR's and 2 air heaters.

I have plenty of excess flow to add another hydro. I anticipate a total of 1.6kw @ 80vdc.

Now to my question: can I add the 2nd hydro in parallel to the line to the classic?  That is two hydro sources of 80vdc behind one Classic? 

I see discussions in unrelated topics around mppt fighting, which I *hope* disappears with my 200 pinned at 80vdc.

I am off grid remote WFH and value best practices as logistics are slow and complicated and no power/internet = no job.  That said Classics while worth every penny, cost a lot of Pennies, so if I can avoid adding another I would like to.

[J4501]

Update: opened a ticket with support and got a quick reply.  Thought I should post it here in case someone asks in the future. Warning, this being a corner case with some dependencies I suggest you consult support before deploying!

I will work with the hydro manufacturer regarding the diode question.

 Support reply:
Subject: Hydro questions   Date: Mar 20, 2026   From: SUPPORT
xxxxx,
I see no issue if you are parking at a fixed voltage. Both hydros should make power no issue. Not sure if you need to isolate them from each other with diodes but the classic 200 will do fine

[FNG]

With hydro and a parked voltage its a non issue, if it was wind or hydro and using the MPPT tracking it can become an issue as no 2 turbines track identically and they would pull the MPPT around back and forth and likely be less efficient