Bi Facial Panels

[ALAN/ALAN D]

Quote " but advised to use lead acid rather than lithium. " ????
LIFEP04 have 6000 life cycle.
I have bought 8 lead acid and they are TOTALLY USELESS.

Why not use single phase to three phase variable speed inverters. Been using them for 20 years to drive lathe / drilling machines.

[Stinsy]

Also have 750w hydro turbine running 24/7 during winter which I want to feed into a battery bank but advised to use lead acid rather than lithium.

That advice is completely wrong!

Time has moved on. You should 100% use lithium batteries. There is a whole laundry-list of reasons why Lithium is better than Lead.

[renewablejohn]

This confused me too, whilst thrashing around the net (generally Australian results for solar admittedly) it was saying that there are (no mention of off grid only) 3 phase into one inverters allowing use in regular fashion of Renewable Johns panels, but when speaking to someone previously (a nice seller a few years back now) he said "not that pile" (meaning factory solar ..ie 3 phase, so I need to remember & dig deeper, it makes perfect sense to me as to incompatibility as per longstanding commercial versus domestic ..but needs clarity or blowing out of the water, keen to see the workaround obviously.

Only fix I have been given so far is to buy 3 hybrid inverters and set up each inverter phase out by 120 but then it got complicated and over my head with the integration of batteries for such a system including the hydro.

[Mr Gus]

I can see why you'd not want to go down that route

[smegal]

This confused me too, whilst thrashing around the net (generally Australian results for solar admittedly) it was saying that there are (no mention of off grid only) 3 phase into one inverters allowing use in regular fashion of Renewable Johns panels, but when speaking to someone previously (a nice seller a few years back now) he said "not that pile" (meaning factory solar ..ie 3 phase, so I need to remember & dig deeper, it makes perfect sense to me as to incompatibility as per longstanding commercial versus domestic ..but needs clarity or blowing out of the water, keen to see the workaround obviously.

Only fix I have been given so far is to buy 3 hybrid inverters and set up each inverter phase out by 120 but then it got complicated and over my head with the integration of batteries for such a system including the hydro.

I HAVE NO EXPERIENCE IN THIS - just hypothesising

Could you use something to give a reference 3 phase signal then connect a single phase inverter to each phase?

[Mr Gus]

Bearing in mind how crusty we are age wise here (generally)
Does your mind want to revert to "bi-focal" when a thread on bi-facial panel discussion crops up?

I hope it's not just me damn it!

[Stinsy]

An off-grid 3-phase inverter is the obvious solution. These aren't that difficult to find!

[Marcus]

Also have 750w hydro turbine running 24/7 during winter which I want to feed into a battery bank but advised to use lead acid rather than lithium.

That advice is completely wrong!

Time has moved on. You should 100% use lithium batteries. There is a whole laundry-list of reasons why Lithium is better than Lead.

Not necessarily that simple:- lead acid will still have significant value when they reach end of life. Lithium? Lead acid 97% recyclable. Lithium?

Perhaps more to the point, though, is when connecting hydro or wind generators to the battery you tend to connect them directly and use a diversion controller when the battery is full, but the battery is still there providing voltage stability to the d c. bus, inverter and controllers. Lithium have a tendency to disconnect when they're full, and having 750w of hydro pushing into the inverter and controllers without the stabilising presence of the battery could cause the magic smoke to come out.

It can be done with lithium of course, but it may be less simple.

[Marcus]

It may be simpler and/or cheaper to have a single phase system and use VFDs, or a phase converter to drive your 3ph equipment, rather than having your whole battery/solar/hydro system running 3ph a.c.

[Tinbum]

Only fix I have been given so far is to buy 3 hybrid inverters and set up each inverter phase out by 120 but then it got complicated and over my head with the integration of batteries for such a system including the hydro.

I run 3 phase using 3 SMA Sunny Island 5048's. Their are Hybrids that will talk to each other to run as 3 phase.