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Thread: Solar PV system back up

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    Member vosHonda's Avatar
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    Question Solar PV system back up

    Hi all, is here the solar Guru? I need small advice. The PV items are installed, the AC coupling and battery bank is ready to be connected.
    All I need is. During the sun light AC coupling will charge up battery, then power will go to the grid. After sunset power will be taken from battery discharging `em down to 70-60%, then power will be taken from the grid. And so on.
    I guess, the auto change over switch will get this idea into reality.
    Have a good one.

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    Member Crobbo's Avatar
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    What components are you using.
    In sterquiliniis invenitur.

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    Member vosHonda's Avatar
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    I `ve got Fronius Primo inverter and 10 tier 1 Talesun 275w solar panels.
    The goodwe GW3600s-bp AC coupling is installed and battery bank of AGM 165 AH 48vdc is assembled.
    Have a good one.

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    Member Crobbo's Avatar
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    Do you have the RS485 meter in the switchboard and connected to the goodwe?
    In sterquiliniis invenitur.

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    I have EZ meter and CT. This items are not installed/connected yet.
    All I need is wiring diagram, I can do the rest by myself.
    PM me your mob. number and I will give you a buzz, mate.
    Cheers. My house is close by to Puma servo at Tonkin#Guildford intersection.
    Have a good one.

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    This is interesting to hear that you can retrofit this setup to an old inverter to suit a battery

    We fitted a Primo inverter with 24 LG panels about 2 years ago and liked the idea of battery storage but batteries and hybrid converters were still quite new and way too expensive to look at doing at the time Always figured that by the time batteries became really affordable that we'd need to replace the inverter

    Can I ask roughly what a setup like this would cost (not the inverter/panels) to fit on an old system as it might be something to look at down the track?
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    Noted. We'll check back on that one in three years
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    If you`ll find a real specialist, it is possible to connect battery back up to existing PV system.
    The AGM kind of battery 12 vdc 150-170 A/H will coast around 330-370$ delivered.
    The AC coupling will coast around 1400-1500$ 3.5 kWt and around 1700-2000$ 5.0 kWt
    Some of the couplings will need 48 vdc. It means 4 12volts batteries requires to get 48vdc battery bank. Also auto changeover switch.
    Problem is. Most of the solar companies are wholesalers. They do simple quick job to install solar panels and inverter only.
    Have a good one.

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    Member shaynus's Avatar
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    Sorry for the slight thread high jack, but with such a battery back up system does that mean if there is a blackout in your area and there is sufficient charge in your batteries, you will maintain power in your home? Just wondering as your typical PV system needs to be connected to the the grid to operate, if I understand correctly.
    I'm not saying let's go kill all the stupid people, I'm just saying lets remove all the warning lables and let the problem sort itself out...
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    Member Para045's Avatar
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    Quote Originally Posted by shaynus View Post
    Sorry for the slight thread high jack, but with such a battery back up system does that mean if there is a blackout in your area and there is sufficient charge in your batteries, you will maintain power in your home? Just wondering as your typical PV system needs to be connected to the the grid to operate, if I understand correctly.
    When I Googled the GoodWe GW3600S-BP I found this > https://mcelectrical.com.au/blog/goodwe-bp-review/ which seems to indicate that no you don't have power during a blackout

    The GoodWe BP cons
    It can probably only use half of your solar. Most solar inverters are broken into two parts or two “trackers”. This means about half of the panels run on one of the inverter’s trackers (think “engines”), and the other half run on the other engine. The GoodWe inverter can only use one of your inverter’s trackers. So you will probably only be able to use about half of your panels to charge the battery.
    It can’t run when you have a blackout. Your existing inverter will not allow it. Many hybrid inverters will also not allow this, but if you are paying a premium for a battery, I think you deserve the luxury of having a bit of power in a “blackout” and have the luxury of using the power that your panel are producing during the day.
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    Quote Originally Posted by Phildo View Post
    Noted. We'll check back on that one in three years
    Quote Originally Posted by filbert View Post
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    most solar battery setups won't give you backup in case of blackout. you can get them, but it's gonna cost more than a battery system which which just supplies at night or when consumption outweighs production
    "I think she's kinda sweet...but she makes her living catching cum in her mouth and i'm sensing that's a problem with you"

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