Help, I dont know what to buy.

homeprobe · Jun 19, 2024

I just want a simple off grid supplemental system for charging my EV. Is there an off-grid inverter out there, that will provide me with 240 volts and little to no battery backup? If so, please share and if it does need batteries? How few can I get away with? Thanks for your help

Suijkerbuijk · Jun 19, 2024

You always need a battery .
Sun power is not like a grid always on.
Its power go up and down by clouds and rain
The battery is that it charger and than go in with nice flow.

yabert · Jun 19, 2024

What to buy?
A lot and a lot of solar panels to have decent power even when some cloud are there.
After, an inverter to match your desire charging power (let say EG4 6000XP to have 6 kW).
Hook this to a small 48V battery (less than 1k$) and you are good to go.

I just want a simple off grid supplemental system for charging my EV

It's never simple...

homeprobe · Jun 19, 2024

Suijkerbuijk said:
You always need a battery .
Sun power is not like a grid always on.
Its power go up and down by clouds and rain
The battery is that it charger and than go in with nice flow.

Thanks, I wasn't sure if there was an updated inverter to this one?

pollenface · Jun 19, 2024

I have 4.5kw of PV split between 3 mppts, a 6kw off-grid inverter and 4x old 150ah AGM's waiting to be updated.

I can charge our EV at 1.8-2.4kw without stressing anything too much while sun is shining, voltage goes down to 46ish within 30 minutes once the sun disappears. Planning to build a 15kwh battery next year which will help a bit more in the evening (stop it around 9pm)

I pretty much just ran a 20m 1.5mm2 extension lead to the carport where the EV is parked.

yabert · Jun 20, 2024

homeprobe said:
Is there an off-grid inverter out there, that will provide me with 240 volts and little to no battery backup?

With ready to use LFP battery at 200-500$, I don't think it worth to find battery less inverter.

homeprobe · Jun 20, 2024

yabert said:
With ready to use LFP battery at 200-500$, I don't think it worth to find battery less inverter.

Then the question is where and how many?

yabert · Jun 20, 2024

homeprobe said:
Then the question is where and how many?

Simple.
1-Near the inverter
2-A single battery (12v or 24V or 48V in function of the inverter choose).

homeprobe · Saturday at 12:13 PM

yabert said:
Simple.
1-Near the inverter
2-A single battery (12v or 24V or 48V in function of the inverter choose).

Thank you, I appreciate it. But I meant where do I find a battery you suggested. Sorry, I didn't phrase that question well

yabert · Sunday at 6:33 AM

The thing is, there is many components available, there is many ways to achieve what you want and there is many different budget possible.

Many here can help you to design for your needs, but we will want to know more details.
-Budget?
-Proof of concept to learn or system who work 10 years flawless?
-It's your only charging solution or is it simply to be more resilient?
-Is it to save money?
-power expect?
-space available for panels?
-orientation of panels?
-inverter/battery localization?
-what your skills? You plan to do all yourself of do you plan to hire electrician for everything?

Help, I dont know what to buy.

homeprobe

New Member

Suijkerbuijk

I cannot be held responsible for this information.

yabert

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homeprobe

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pollenface

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yabert

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homeprobe

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yabert

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homeprobe

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yabert

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