Recent content by NHRenewables

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    Growatt ShineStick Connectivity Issues

    First, let me say, the product setup documentation is aweful for this product. This can’t hold a candle to Enphase monitoring with even 5 year old gateways. Overall, it seems that monitoring is an afterthought for Growatt, strangely for a good inverter with an affordable price point. After...
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    Can Growatt Inverter do this?

    With AIO (Growatt, MPP), you don’t want to back feed into the main breaker, rather move your critical load to a new sub panel downstream of the AIO. All solar generated via the AIO will be used internally. Bad things will happen if you attempt to close the loop. Follow the electrical code...
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    Grid tie DIY battery backup

    Install a AiO, add a critical load panel downstream, and you’ll take back control of the Kw your system is producing. Size your battery to your 24hr consumption.
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    SPF 3000TL LVM-ES

    For tinkerers, this is the standard approach which I identify with as well. The industry at large has become a lot more cost effective. My suggestion for newcomers is prior to pulling the trigger, write up your wish list for your design and do an energy audit. In the end, you’ll spend less and...
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    Growatt SPF 3000TL LVM or SPF 3000TL LVM-ES

    Do you have Option 4 for energy saving? I think that might be your problem.
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    SPF 3000TL LVM-ES

    I agree with all your points as well. What I don’t understand is the need for additional complexities of installing transfer switches and the like.
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    SPF 3000TL LVM-ES

    People should commit to installing their AIOs to their locality’s respective electrical codes for safety. To be blunt, don’t half-@ss it, electricity is dangerous, My suggestion is that people install their AIOs as if it’s an enhancement to their main breaker by sizing their AIO purchase to...
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    SPF 3000TL LVM-ES

    I’m not sure why everyone is wiling to spend a lot of up front costs for an AIO, and then treating it as a generator. It’s better to consider it a UPS. On my 3 bedroom home, a 3000 watt generator has satisfied my needs during multi week power outages in New Hampshire. No fun filling jerry...
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    GroWatt SPF 3000ES: Grid charge during use?

    looks like you changed a lot of settings from default. I’d look at setting 14, and change setting 4.
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    Optimization of solar in winter/grey days

    Here’s a DC wire size calculator. Remember this is all about making sure the wire can carry the power from the panels to the Mppt charger efficiently. Note that watts are not part of the calculation, it’s all about the flow, distance and resistance. A good analog to this is water flow through...
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    Optimization of solar in winter/grey days

    I’d recommend reading the following to do your string calculations. You want to optimize your voltage to be compatible with your DC wire runs. You may see large losses running on 6AWG if you get these wrong. https://solardesignguide.com/calculating-string-size/
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    Feedback on use of all-in-one switching Growatt to supplument home grid system

    I guess you’re using it more as a battery backup solution. The investment in an AIO is not trivial and I see it as a better solution for self sufficient AC coupling in how the grid is going to change. My expectation for the AIO is to have the same uptime as the grid and be slowly adopted as a...
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    Optimization of solar in winter/grey days

    I’m interested to hear how big your wires are back from your combiner box?!? Any design room to bump up the voltage Instead of throwing away photons?
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    Feedback on use of all-in-one switching Growatt to supplument home grid system

    He’s just testing in that config. it works, but not safe for a long term configuration. Growatt specifically calls for mounting the units to concrete fiberboard for fire safety.
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    Feedback on use of all-in-one switching Growatt to supplument home grid system

    If Growatt and the like AIO are of interest, I’d recommend reading up on AC Coupling.
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