NC_hydro
Solar Enthusiast
- Joined
- Oct 14, 2022
- Messages
- 295
I'd pick a quality box without remote monitoring vs a Beta Box with it.
Very large off-grid planning considerations - timing
- Thread starter jnmit12
- Start date
Buy victron and get both- Quality box with great remote monitoring and control
Ha! Yes. Nothing about this project is undersized... I guess I meant undersized relatively speaking... 40 k+ PV is a lot!
Thank you. No permissions needed for anything (anything!). Installed our own septic, well, etc. Starlink, Solar, and partially underground...
Will need to provision for solar mounting all at once due to TPO roof design (I don't want roof penetrations), so it makes sense to prepare for final PV design, even if racking is partially empty. I can install a 'permanent' electrical room underground now and add battery capacity i suppose.
Nobodybusiness
Solar Sponge.
I have a 30kw array and could still use more for winter.
Thank you. This is helpful. I was concerned about the entire battery bank bouncing between full and slightly discharged 90% of the time. The capacity calculation is to accommodate the 10% of the time everything will be on (at night).
Brucey
Solar Wizard
I believe so.
I think Dexter mentioned there's an app, but whether that ends up being as expansive as what VRM and VenusOS can deliver is unknown.
Not sure if the app is local only or online via some portsl
I think so but probably not in the same league of configurabilty as Victron with ess assistants etc
Less than that for Victron 10k which has been proven over many years.
No and this is definitely a weakness versus the Quattro option. There was talk of just getting two in parallel working correctly which is a walk in the park for the blue.
might be using whizzbangjr
For the Rosie/Hawkes Bay/Barcelona they apparently all talk together via canbus. If you add an additional charger it will pick up the settings from the existing charger/network etc, which would be an improvement over Victron where you have to define the controller settings individually to match existing.
30W per the spec sheet:
MidNite Solar Rosie 7048RE 7000W Inverter 120Amp Charger ~ Current Connected
Introducing Midnite Solar's latest innovation in power technology - the sleek and stylish Rosie inverter, designed and made right here in the United States. Powered by the latest silicon technology, this powerhouse can surge up to 3X its rating, yet remains incredibly lightweight, making it easy...
www.currentconnected.com
Interesting. I have not put much thought into sizing the PV array, given the low cost of PV capacity and the intended size of my battery bank.
I'm in South Texas (Hill Country) but it is fairly cloudy much of the Winter. House heating won't be a major concern with thermal mass of underground construction and extensive insulation. But pumps/motors/etc always consume.
Just in case, run the calculations with a tool like this:
JRC Photovoltaic Geographical Information System (PVGIS) - European Commission
Photovoltaic Geographical Information System (PVGIS)
shadowmaker
Solar Addict
No. Unfortunately it is not.
But then maybe you don't have -40C/-40F...
Strongly suggest separate building with climate control for your solar stuff/batteries. LFP chemistry is considered safe, but I wouldn't want to sit on that much power.
Nobodybusiness
Solar Sponge.
Definitely hard to predict usage on new construction.
I guess you won’t know until it’s done.
I just wouldn’t want you to get to December with no Grid or Generator then run out of power.
No Bueno..
Brucey
Solar Wizard
Given the potential for load requirements to expand significantly I would withdraw my Rosie suggestion and go with the 10kVA Quattro building blocks. The Rosie is advertised as suitable for "midsize" homes and this sounds like it's gonna be a monster.
and I assumed I would get ridiculed for overkill...
Brucey
Solar Wizard
You could win a big Powerball and we'd still easily spend it all on massive overkill.
hwy17
Anti-Solar Enthusiast
Amen.
Ever since I got some roofing knowledge myself and did some roofs on outbuildings, I will forever avoid extra penetrations a dwelling roof if at all possible. Outbuildings where there's less at risk and I can directly monitor the underside of the sheathing, then it's tolerable.
Thank you. I was considering this topic yesterday. My domestic breaker and manifolds will sit in a basement mechanical room. Batteries and RO water system will sit directly below this, in a -2 level basement. All 12" concrete with concrete suspended floor decks etc. Basically mechanical rooms are concrete vaults. Steady temp, & gravity floor drains. It fire suppression is low priority, wondering if ventilation plan might be useful?
Nobodybusiness
Solar Sponge.
Maybe but your situation is a little different.
You don’t have Grid or Generator.
In the summer I’m way over paneled and batteries are full by noon.
However in December and part of January I am still underproducing.
I have Grid tie though. I can use grid to make up the difference.
Just don’t sell yourself short unless you want to be buying and racking panels in December or buying a Generator.
Yeah I like your initial suggestion best. Stacking 10kva quattros
I currently only have victron shunt and a charge controller but I absolutely love the power of the venus os and vrm.
Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 21,193
Since I'm an SMA Slut, I'd lean toward 2x (or 4x) Sunny Island for split-phase or 3x for 3 Phase. 11.5kW (or 23kW) or 17.25kW continuous from battery.
If you find a deal on a DC Solar trailer, and replace the probably dead battery, that would get you started. If it is one with generator, you're all set for building.
When you're ready, add up to 24kW (or 48kW) or 36kW of Sunny Boy inverters, AC coupled. Overpanel to taste.
You'll want sufficient battery for your needs. Lead-acid will handle surges just fine. Configure charge current appropriately. For LiFePO4, needs to be able to supply and accept the surge currents, and you have to choose between open loop (pretend they are VRLA) or select a BMS supporting closed loop.
If you find a deal on a DC Solar trailer, and replace the probably dead battery, that would get you started. If it is one with generator, you're all set for building.
When you're ready, add up to 24kW (or 48kW) or 36kW of Sunny Boy inverters, AC coupled. Overpanel to taste.
You'll want sufficient battery for your needs. Lead-acid will handle surges just fine. Configure charge current appropriately. For LiFePO4, needs to be able to supply and accept the surge currents, and you have to choose between open loop (pretend they are VRLA) or select a BMS supporting closed loop.
I (will) have poured concrete roofs with a TPO layer on top (belt and suspenders for a DIY job). Solar 'boots' will be mechanically fastened to the concrete roof deck, with welded TPO boots surrounding them. Something of a direct attachement / ballast hybrid in that the mounts are firmly attached, but there are not penetrations through the roof itself. I've not done a TPO roof before, but have some contacts for help.Amen.
Ever since I got some roofing knowledge myself and did some roofs on outbuildings, I will forever avoid extra penetrations a dwelling roof if at all possible. Outbuildings where there's less at risk and I can directly monitor the underside of the sheathing, then it's tolerable.
