1x big inverter or 2x smaller in parallel?

[Offthewall]

I will be building a workshop on my farm and have no mains power and it’s 5hrs drive to the city.
I want a good setup with top quality gear that’s reliable so I was thinking along the lines of paralleling 2 x inverters so that if one fails I can at least have some power. Does this sound like a good strategy or should I be looking at one bigger inverter?
I was looking at 2x Victron Multiplus’ 48/5000. If I was to go just the one inverter the Selectronic SP Pro 7.5kw.

Cheers
Dan

[J.P.M.]

Is this a stand alone PV for the workshop only ?

Depending on the particulars of your situation and what type of electricity you have or plan on for the workshop, I'd get an inverter sized and fit for the service and a generator that uses available fuel (propane ?, diesel ?, gasoline ?, nat. gas ? ), and enough spare parts to fix most of what could go wrong with either.

[Mike90250]

whatever you decide, compare it against the Schneider 6.8kw
https://solar.schneider-electric.com...brid-inverter/ ( or which ever model fits your country )
it does require a Gateway ( more $$) or SCP to program it, and a 48V battery bank.

2 in parallel, if one dies, will it destroy the other ? I'd lean toward 2 smaller, totally separate
and if you have batteries, you need a generator to be able to recharge when there is no sun

[Offthewall]

Is this a stand alone PV for the workshop only ?

Depending on the particulars of your situation and what type of electricity you have or plan on for the workshop, I'd get an inverter sized and fit for the service and a generator that uses available fuel (propane ?, diesel ?, gasoline ?, nat. gas ? ), and enough spare parts to fix most of what could go wrong with either.

The system will run the workshop and living quarters which will be small and required while I build a house whereby the system will then run everything. I’m Australia so 240v single phase AC 50hz. I have a lot of gear in terms of workshop machines and will need max 5kw continuous, I live alone so don’t really have a lot running at once. Yes will purchase a diesel generator as backup and for welding heavy steel.

cheers

[Offthewall]

whatever you decide, compare it against the Schneider 6.8kw
https://solar.schneider-electric.com...brid-inverter/ ( or which ever model fits your country )
it does require a Gateway ( more $$) or SCP to program it, and a 48V battery bank.

2 in parallel, if one dies, will it destroy the other ? I'd lean toward 2 smaller, totally separate
and if you have batteries, you need a generator to be able to recharge when there is no sun

I can’t see how one dying would kill the other, only problem I can see is if the master died which may render the slave inoperable but that would just mean a reprogramming. I could be wrong and will need to do some more reading. This needs to be a rugged stand alone system so batteries a must. So far I have the PV and 3 x Morningstar 60amp mppt’s. can’t decide on inverter at this stage and batteries…….geez there are so many options now. A few years back when planning this project I looked into Nickel Iron but now I’m thinking Lifepo4 or LTO. Either way I live in one of the cloudiest places in Aus and have excellent wind coming off the ocean so plan one day to build a dual- axial flux wind turbine, about 1kw and use the 3rd mppt controller to divert into a dump load.

yes I will have a diesel generator for backup too.

cheers

[Mike90250]

Batteries - Lead acid or LiPo4. LTO is too volatile unless you have a bunker building to keep them in.

Inverters. Offerings from the big 3 Schneider, Outback, Sunny Island ( and if Midnight ever gets the B17 off the ground, their modular inverter)

You mentioned wind, which requires dump loads and suitable controller for it.

https://www.midnitesolar.com/products.php?menuItem=products&productCat_ID=25&productCatName=Wind%20and%20Hydro

Reliability, surge protectors on the input of the solar charge controllers, outputs of the AC inverters