gramos

I hope this update will be of interest? We have finished the build but for some small details 😃. I bought a modern stove from Kratki , it will wait for winter before connection , it is 35 C here ! I have 2x A/C units fitted so am working in a comfortable 25 C . I have installed a full off grid PV system which is running the A/ C and there is still a surplus of energy 😁 . In fact the growatt inverters shut down occasionally as we are not using enough of our generated power , (open to suggestions here ) The build was challenging for the locals ,who know not the world of Passiv Haus , but we have ticked most of the boxes . It took exactly 1 year to build , on a Greek island , so much more of a challenge especially during the covid situation. The house retains the cool temp overnight , it's a pleasure to walk in at 0800!

I used a wall and put a fence on top which gave the perfect angle to mount the panels . Locally @ 37 degrees

, You have probably sited this by now , but ... would it be a good idea to place it "downwind " , away from the house ? This because of the noise they can generate , as if it were sited upwind the noise would carry toward the house ? I know thhis is apparent in siting of generators .

Thanks , thats what the system specced originally ! my main concern was the length now at 36 M. Good to have some more confirmation though

water heating by solar, lpg gas oven , woodburning stove for heat , passiv haus levels of insulation , triple glazing and of course when required a genny !

I am in Kefalonia , Greece , 38°07'24.9" N 20°34'55.0"E - This is our solar input , my calculations were based on . A surplus of power all summer and sufficient reserve during the winter months . Quite right , Steamy Tea , kWh per day , based on current use . Average Solar Insolation figures Measured in kWh/m2/day onto a solar panel set at a 37° angle: (Optimal winter settings) Jan Feb Mar Apr May Jun 3.77 4.16 5.15 5.57 5.46 5.83 Jul Aug Sep Oct Nov Dec 6.01 6.20 6.01 5.19 3.72 3.20

Thanks , thats what the system specced originally ! my main concern was the length now at 36 M. Good to have some more confirmation though

Thanks , thats what the system specced originally ! my main concern was the length now at 36 M. Good to have some more confirmation though

Yes I wanted a big system with 3+ days autonomy, as there is no grid going in anywhere near us and its for a house and workshop ! Usage per day is well under 3 kw

Inverter specs above

Pictures of a panel specs:

Thanks , for the feedback guys . I made all the hook ups with one panel disconnected. the system is 11.2kw from Rosensolar , it comprises : 28x 400watt pv panels 2x DC combiner boxes with breakers , switches 2x Growatt SPF 5000 TL HVM WPV P 5 kw inverters 1x battery combiner box 3x life po4 48v /200 ah batteries. I hope you find this interesting ? I am treading carefully here and really happy to hear your comments , thank you . The first question is can a solar rated 10 mm2 cable be used from the combiner boxes to the inverters over a 36 metre run ? Graham

Yes this is exactly what I did with each string when connecting , thanks .

I just came across this thread , thankfully, I am just installing an off grid system for a new house . I tested the output of 7 panel , 4 X strings and all 4 string were producing over 300 volts , total output 1280+ volts , this on a partially sunny day . I have to take this power to the " power station" steel shed so am looking at suitable cable . The highest solar rated cable found is 10 mm2 . Does this cable size have enough capacity for this voltage ? I have tried some if the online converters but there are big variations.

Kalispera and thank you for the welcome . A little more about our project for those that find it interesting . It was difficult to find any interest or even knowledge of Passive House criteria on this Greek Island but we are on the way ! The house is designed and specified to keep the heat out in the hot summers as much as retaining warmth during winter , insulation being key . Timber frame is understood here but 90% of houses are built using concrete frames with hollow brick infills and up until recent construction law changes, zero insulation ! Concrete is heavily re- enforced and foundations are substantial and deep Kefalonia sits very close to the Aegean Plate which is being subducted by a north moving Africa plate, up to 20mm p.a. Therefore it is accorded zone 1 seismic risk , the highest . Earthquakes are common , a 4.8/ 5.0 last week ! the buildings here are almost all built after the major seismic event in 1953, which destroyed the majority of buildings the island , so the building control is very strict . As regards the stove , I am looking at 5 +kw to heat the whole house utilising 2 x centralised mhrv units . the house has 2 x lofts with a cathedral ceiling dividing them so two units are needed as there can be no crossover ducting . we burn oak and olive wood so high calorific output is achieved .

Kalispera , from Kefalonia , where my house build is in progress . I just found the forum when researching woodburning stoves for this type of house . It is a PH build , in principle.