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    Re: Buying new batteries

    Correct me if I'm wrong but some of these devices have their own batteries..
    It's way more efficient to run these with their own batteries (or bigger ones) than to power them from an inverter.
  2. Re: Grid-tied or off-grid. Please consider ...

    Exactly! This was the concept and they built these smart inverters to do just that. But then the utilities spoiled the party! :(
  3. Re: Grid-tied or off-grid. Please consider ...

    I'm afraid I haven't got any news. All I know is that the model of RE using and powering back into the grid is fine in theory. In practice it's another story.
    The problem is that RE is typically...
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    Re: Power for a modem

    So you are using one mini UPS per device??
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    Re: CBI Smart Breakers

    Yes. The coil of the contactor draws mA of current so can easily be switched by the R3.
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    Re: CBI Smart Breakers

    Yes. The problem are the transients (voltages and fields) produced when switching heavy loads. (The flash that you see when the contactor operates.)
    These are big electrical spikes that get induced...
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    Re: CBI Smart Breakers

    Is is advisable to separate the power switching contactors from your control device. So if you install the contactors in the main incomer DB and control them from another panel which has the...
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    Re: Exide 105aH

    How do you test the capacity of your batteries?
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    Re: Efergy E2 Classic lost Screen

    Have a look at this ad. Looks like 2 systems..
    https://www.gumtree.co.za/a-other-electronics/somerset-west/efergy-electricity-monitoring-transmitter-kit/1009402444190912847670009
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    Re: Efergy E2 Classic lost Screen

    Phone Ellies. They are the agents.
    They might be able to get for you...::)
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    Re: Deep cycle battery advice

    I have heard of bad reports of Vision. I can't recall if it was their batteries or inverters but let me know if I should dig this info out..
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    Re: Exide 105aH

    How long is the warranty and what do they cover?
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    Re: CBI Smart Breakers

    Please post a link for this product..
  14. Re: A weekly timer on my battery charger - is this a mistake?

    These smart chargers can be permanently connected to your batteries.
    The voltage supply is current limited and will disconnect when it reaches fully charged state and then it repeats.
    The LEDs are...
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    Re: Avoiding solar power throwaway

    Indeed! The last thing you want is to draw power from your battery. Geyser power from the inverter should only use excess available power from the PV panels.
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    Re: Avoiding solar power throwaway

    MPPTs do not adjust for maximum power transfer in a few seconds. They can hunt for a while.. This means your inverter is loaded more than it should be during this period.
    The comparison between a PV...
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    Re: Avoiding solar power throwaway

    Great idea! I'm aware of the MPPTs needing an initial period to adjust for maximum power so this allows this to happen before the maximum current is drawn.
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    Re: Avoiding solar power throwaway

    This isn't a 12V element. These PTC elements are also used in their Dual systems. This is a PV panel water heating system:...
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    Re: Heat Pump

    This is the response I received when I asked Kwikot on stratification:

    The water will behave in a thermal cycle when the element is on – as soon as it switches off the water stratifies into layers...
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    Re: Avoiding solar power throwaway

    I have been asking this question about feeding excess power into the grid wherever I can.
    It's the elephant in the room syndrome. People are not forthcoming. (note the silence from Fluffy in this...
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    Re: Avoiding solar power throwaway

    Perhaps but the information is so scarce that any feedback on the subject is more than welcome..
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    Re: Avoiding solar power throwaway

    Thanks for this.
    Please share the arrangement that you have with the utility and any of the details of how the export power is measured.
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    Re: Victron battery mmonitor

    The way the size of a battery is determined is in Amp hours (Ah)
    That means if it's a 100Ah battery it should be able to supply 1 Amp for 100 hours (or 100 Amps for 1 hour)
    The battery monitor...
  24. Re: Battery backup for sliding gate motors

    Sure! The only thing to consider is that the charger will only charge when the sun shines.
    This also leaves you vulnerable (when there's no sun for days)
    So better to have both the mains charger...
  25. Re: Battery backup for sliding gate motors

    That's an overkill I reckon.
    If the existing battery is 7Ah then simply replace it with an 18Ah battery (no need to add an external charger for this)
    You could also add a small solar PV panel &...
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    Re: Avoiding solar power throwaway

    CoCT require that you buy a bidirectional meter (R15k?) to determine the power that is exported and consumed.
    This is due to the difference in the credit paid for feeding back into the grid and your...
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    Re: Avoiding solar power throwaway

    It depends on the regulations of your utility and these aren't all the same.
    Contact your electricity provider and enquire about grid tie feed back into the grid (SSEG)
    Where are you located?
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    Re: Avoiding solar power throwaway

    Wonderful!
    At least I can now say I know of one!
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    Re: Avoiding solar power throwaway

    This is the sad story of RE and grid tie systems. Back in the day the manufacturers developed these advanced inverters that could stay in phase with the grid. Quite a feat! This meant that if one had...
  30. Re: Mecer Inverter - 8 Batteries - Real World Figures

    Agreed! Any infrastructure that the municipality/government has a hand in is problematic.
    However fibre connections are fairly solid. Here in Joburg Vumatel owns most of the fibre and they are on...
  31. Re: Eskom's new proposal for homes with solar panels

    I agree with this argument. Instead of arguing with the city utilities wrt grid tie deals it will be more beneficial to establish mini/micro grids.
    The ideal opportunity are the residential...
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    Re: Deep cycle battery advice

    As soon as the market gets hold of a buzz word that it can use and abuse they do just that!
    IMHO only the big batteries (Trojan etc. and those 2V batteries) are 'deep cycle'
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    Re: Deep cycle battery advice

    Fair enough! In this application Li-Ion has got to be the best option.
    My comment is about lead acid batteries in general...
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    Re: Deep cycle battery advice

    Ja-Nee! I agree. These SLA batteries are for those people not wanting to get involved.
    If you check out the real deep cycle batteries they are always wet batteries that you can equalize.
    This...
  35. Re: How about using PV panels as awnings?

    Sure! I know that when installers of PV panels do a job they don't like wind.
    I was thinking of a bracket with a sliding mechanism that allows you to withdraw the panel when required (not...
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