Home Immigration 18 Months with OFF GRID Solar – Worth It? – #29

18 Months with OFF GRID Solar – Worth It? – #29

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18 Months with OFF GRID Solar – Worth It? – #29

We’ve been off-grid on solar for a year and a half. Has it worked? Have we had to change our behaviour? Do we use more or less power than we used to? How much do we need to use a backup generator?

We’ll answer all these questions and discuss some of our future plans for upgrades and expansion.

Our Solar Setup:
2400kW of solar panels
3-string DC combiner box
Victron MPPT Solar Charge Controller 150V | 60A
Victron Multiplus II 48V | 5kVA | 70A inverter / charger
Victron Cerbo GX communications system
4 Pylontech US2000 batteries | 9.6kWh of battery storage
Total system cost: €6250

MOSA GE-4000 3kVA generator | Honda petrol engine – additional €770

The supplier of solar kit we used in Portugal:

source

22 COMMENTS

  1. Is there a way you'll be able to make your setup relatively bushfire safe at all? I remember you talking about fire risk and bushfire plans at some point, the rising temps round the planet seem to render this an even more crucial topic nowadays…
    Best of luck for your future endeavours!
    Watching your videos gives me so much inspiration and the idea that a lifestyle like yours is actually attainable. Thank you for sharing your thought and learning processes so openly, too – so much research and planning! Almost unbelievable how you seem to fit all of this into your already busy bee days…

  2. Hi Guy, I'm catching up on all your videos from the start and I think all the work you're doing is amazing. Your wife is an incredibly impressive lady!! Does she has previous building experience? Amazing stuff 👍👍

  3. Are you installing solar panels with Micro Inverters? Maybe I missed that during your great video, but how are you going to heat the house during the winter time? Portugal does get cold during winter and the older houses are not for cold or wet weather (personal experience).

  4. Hi both. Is this the price you payed for solar kit from 18 months ago or the price now?. How many panels, It looked like 12
    I am doin tiny house living. Have two containers 24 ft and pump house 10×10 ( storing electric, water and irrigation pumps).
    I’m only living in one right now, but don’t plan on needing much, but obviously two fridge freezers and be able to run a decent fan in height of summer.
    Thank u for informative video 🙏

  5. As you increase the electrical draw and number of electric motors, consider investing in some soft start devices for some motors. Would lower the surge current and may allow you to keep your current inverter. As far as solar, consider finding a way to get 1 or 2 axis directional solar array. The current 2 axis setups are expensive, but I think an E/W single pole pivot setup (Frame that pivots around a single cental N face pole with lower edge of frame rolling on a curved track with wheel driven by motor controlled by solar tracking device) might work for you if you don't get snow. The N/S tracking using an automated system is a bit more complicated, but a mechanical way to adjust frame angle every 2-3 months is simpler.

  6. Hi, I recently understood that, instead of pointing al solar panels to the south, it is better to use a setup in which the panels are pointed west and east. Not to get higher production, but a better distribution of solar power production during the day. Or did you already researched this? Love your show, keep making…doing…growing

  7. Have you considered doing an east-west configuration of the solar panels for a better spread over the day or is a battery setup making a due south setup most effective anyways?

    And do you have any plans for the usage of the surplus power you generate but can't store in the batteries?

  8. Hey, Guy and Kylie! Greetings from Oz! Got a couple of questions I've been meaning to ask and kept forgetting. I noticed in this vid that your solar panels are arranged in three pairs, all facing in different directions. Now when I was studying 'solar array design' EVERYONE said you need to point the panels all in the same direction, as whichever panel or cell is producing the least output, all the other cells will drop to match it, meaning you get less output if panels don't all face the same way.
    The only exception apparently is if each panel or 'string' of panels (all pointing in one or other direction) is separately wired to the inverter through s single MPPT controller, or 'channel' into the inverter. Is this what you've done? It wasn't at all clear why the panels were arranged the way you have them.
    I mean, I'm guessing it's to pick up a bit more sun earlier and later in the day, as the sun moves around the yard and so lands on the next pair of panels, but I'm curious as to how and why (and whether) this works. I did hear you say you sometimes get 20kWh in a day from your 2.4kW array, which seems to me consistent with what I'm getting from my 2.0kW fixed, one direction, grid-tied array back here in Oz, where I'm at 32degS. I think you guys are near Castelo Branco, so about 39degN..?? According to all the info I've seen, insolation (rule of thumb) is "latitude – 10 deg for winter and latitude plus 15 deg in summer". And in Oz east coast, slightly west of north is optimum orientation. So slightly west of south probably for you guys…
    The general thinking is it's better to have ALL the panels facing the direction of maximum insolation, as during the peak hours around midday you make SOOO much more than the off-peak hours in the early morning and late afternoon. It's why advie on tracking (as opposed to stationary arrays) is "add another panel", the difference in overall output is not enough to justoify the added expense and complexity of 'tracking'. Which is "sort of" what you seem to be doing. hence my curiousity. Is the 'general rule' correct, or is having the three different orentations making more than it might on a single orientation..?
    Also, another question. I think you said you were going to build a shed in the corner of the yard near the water meter to put all the Victron gear and batteries in, but were going to put the solar array out in the yard beyond the 'threshing circle' on top of a future carport…?? Again, I'm not sure I'm understanding the rationale. As I understand it (deffo not an expert) the panels should be as close as possible to the battery to prevent losses over distance..?? The other thing I read about this issue in houses is that voltage is critical for this. The lower the voltage, the thicker the cabes have to be, ditto cables on batteries. And cabling this thick is EXPENSIVE. So, shortest runs as possible preferred.
    So apparently, the 'clever' thing is to have a short run from panels to batteries, then have only short 'thick' cables to the inverter, and invert from whatever DC voltage to 230VAC, which then only requires the standard (and much cheaper) two or three-strand PVC-coated 'domestic' wiring to the house and all appliances. So longer runs in standard wiring is MUCH cheaper. IoW, from the carport to the house maybe should be in thinner gauge 'standard' wire, meaning the "machinery" might need to be in a shed adjacent the carport, rather than where you were planning to put it. So has this been part of your research and deliberations?
    Again, I'm not sure what voltage your panels are, and whether your 'system' is already a higher voltage one?
    Most of what I've read has been on boat sites, where 12VDC (or possible 24VDC) is the 'norm'. usually becasue engine starters are either 12V or 24V (in diesel). And large draw items like anchor winches also are in 12VDC, mainly from "industry practice" and just plain habit I guess.
    So knowing how you guys exhaustively reference and research before implementing, I'm genuinel curious as to how you arrived at your conclusions.
    Can you comment/explain the logic of your system in light of the above?
    Am genuinely curious as to how it is/will work… Tx

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