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Posted

Hie guys....hope everyone is OK. I'm doing a quotation for a workshop that works during the day only. So I am looking for an inverter that works with panels only and no battery or Eskom. The workshop is offgrid so the client wants the system to work during the day only ie direct from panels and no batteries. Which inverter brand works best with solar panels and no batteries or Eskom. It's a unique scenario....your advice is greatly appreciated

Posted

@phoenix752 The only type of inverter that you get that does not need a battery is a grid tied inverter. Grid tied inverters need a reference frequency to sync to and cannot operate as stand alone inverters. 

Having an unreliable solar only power solution in a workshop would soon loose it's novelty and could result in some very dangerous situations. Imagine someone randomly switching the power off, usually when there is a lot of power being drawn.

I would suggest getting a small battery for the system that can be expanded to try fill in some of the gaps when you have a drop in solar production. A small battery will not run the whole load of 30kw and will kick out long before then but will allow the system to run. A 5kw Freedom One battery would give you 5kw of "Fill In" power for when there is a drop in solar production. 

Posted
15 hours ago, Sc00bs said:

@phoenix752 The only type of inverter that you get that does not need a battery is a grid tied inverter. Grid tied inverters need a reference frequency to sync to and cannot operate as stand alone inverters. 

Having an unreliable solar only power solution in a workshop would soon loose it's novelty and could result in some very dangerous situations. Imagine someone randomly switching the power off, usually when there is a lot of power being drawn.

I would suggest getting a small battery for the system that can be expanded to try fill in some of the gaps when you have a drop in solar production. A small battery will not run the whole load of 30kw and will kick out long before then but will allow the system to run. A 5kw Freedom One battery would give you 5kw of "Fill In" power for when there is a drop in solar production. 

Thanks a lot...I have already advised the client concerning the issue. We are going to use Hybrid inverters and AGM batteries. Thanks again

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