diy solar

diy solar

Cool text this morning from customer

From the EG4 manual:

1716291794234.png

The rear bracket does not appear to be design to support the entire weight of the battery (282 lbs). This install appears to use that bracket and there doesn't seem to be any support under the battery. Even the units near the floor appear to have their feet removed and seem to be supported by the rear bracket.

This is 3400 lbs supported in a questionable way.

This also doesn't meet the 7 inch unit to unit spacing specified in the manual.

Mike C.
 
OffGridForGood said:
Two 18kPV $10,000
12 EG4 batteries $40,000
28kW PV + racks $15,000
other parts $10,000
Labor ? $25,000
Wow, I think we are seeing what a $100k system looks like :love:
We couldn't even imagine a system like this 4-5 years ago, when guys were spot welding 18650 cells into packs to build a system - remember?
Signature Solar, Current Connected, Watts247 are doing a lot of great work getting products & systems out.
Imagine what we will see posted in 2029 in the forum...exciting times ahead.
Click to expand...
It's certainly impressive but I'm asking myself what they are doing to need 36kW of instantaneous power. You'd need to be totally off grid with 2 EV's and all electric house to come close that sort of draw.

Are they trying to run 20kW of heat strips during an ice storm power outage? I'm in the office now but used to be the electrician in the field. Our utility meters scroll through different screens, one shows the all time peak KW and I never saw one over 27kW. That was a 6000ft2 all electric house, hot tub, 2 x water heaters and 2 x heat pumps with strips, a swimming pool and an EV. The owner was paying no attention to when or how they used power and never even came close to justifying thier 400 amp service, let alone a 200 amp. A 200 amp service pencils out to 48kW.

Don't hear me judging anybody, just curious how much attention was paid to choosing this size of a system.
 
OzSolar said:
It's certainly impressive but I'm asking myself what they are doing to need 36kW of instantaneous power. You'd need to be totally off grid with 2 EV's and all electric house to come close that sort of draw.

Are they trying to run 20kW of heat strips during an ice storm power outage? I'm in the office now but used to be the electrician in the field. Our utility meters scroll through different screens, one shows the all time peak KW and I never saw one over 27kW. That was a 6000ft2 all electric house, hot tub, 2 x water heaters and 2 x heat pumps with strips, a swimming pool and an EV. The owner was paying no attention to when or how they used power and never even came close to justifying thier 400 amp service, let alone a 200 amp. A 200 amp service pencils out to 48kW.

Don't hear me judging anybody, just curious how much attention was paid to choosing this size of a system.
Click to expand...
I wondered the same thing, but as you say we don't know what their loads are, or what solar potential they have.
Comparing to my own system - that runs my home and business next door - this sizing seems odd.

I would love to have 168kWh ESS, but honestly my current 99.6 allows plenty of storage for my needs, and I only run 13kW of Solar and I'm not in sunny Arizona or SoCal. I wonder if this system will hit 100% charge by 10:00AM most days of the year.
 
OzSolar said:
It's certainly impressive but I'm asking myself what they are doing to need 36kW of instantaneous power. You'd need to be totally off grid with 2 EV's and all electric house to come close that sort of draw.

Are they trying to run 20kW of heat strips during an ice storm power outage? I'm in the office now but used to be the electrician in the field. Our utility meters scroll through different screens, one shows the all time peak KW and I never saw one over 27kW. That was a 6000ft2 all electric house, hot tub, 2 x water heaters and 2 x heat pumps with strips, a swimming pool and an EV. The owner was paying no attention to when or how they used power and never even came close to justifying thier 400 amp service, let alone a 200 amp. A 200 amp service pencils out to 48kW.

Don't hear me judging anybody, just curious how much attention was paid to choosing this size of a system.
Click to expand...
From the metal building backstop may be powering a workshop or other thirsty machines versus a house.
 
2-18kpv only provides 24kw/100a of instant output, that doesn’t seem unreasonable for an offgrid home/ranch

I am curious about how critical the comment section seems to be though…owner of the build isn’t even on here it would seem, so it’s not like the scrutiny is beneficial
 
G00SE said:
2-18kpv only provides 24kw/100a of instant output, that doesn’t seem unreasonable for an offgrid home/ranch

I am curious about how critical the comment section seems to be though…owner of the build isn’t even on here it would seem, so it’s not like the scrutiny is beneficial
Click to expand...
Except about 100,000 members plus how many guests could see this post. That is a lot of people.
I don't dwell on the installation shortcomings, but it does seem fair for memebers to comment on the lack of bus bar covers, the spacing and support for the (very) heavy batteries, especially where this seems to be at odds with the installation manual. At least it brings some attention to these issues for anyone following along.
 
OffGridForGood said:
Except about 100,000 members plus how many guests could see this post. That is a lot of people.
I don't dwell on the installation shortcomings, but it does seem fair for memebers to comment on the lack of bus bar covers, the spacing and support for the (very) heavy batteries, especially where this seems to be at odds with the installation manual. At least it brings some attention to these issues for anyone following along.
Click to expand...
It’s ironic to point out installation shortcomings from a single screenshot while half the people can’t even get his spec sheet right.
 
G00SE said:
It’s ironic to point out installation shortcomings from a single screenshot while half the people can’t even get his spec sheet right.
Click to expand...
The real irony would be if there's a failure of one of those 14kWh batteries and the setup picture is used against them to deny warranty coverage due to not following user manual with regard to minimum spacing and support on the bottom of the units.
 
Brucey said:
The real irony would be if there's a failure of one of those 14kWh batteries and the setup picture is used against them to deny warranty coverage due to not following user manual with regard to minimum spacing and support on the bottom of the units.
Click to expand...
That made me chuckle. 🍻
 
In seriousness tho if that were to happen, in a small claims court proceeding the fact that the owner of eg4 shared the picture with the world at large would seem to imply tacit approval of the configuration as shown.
 
OffGridForGood said:
Except about 100,000 members plus how many guests could see this post. That is a lot of people.
I don't dwell on the installation shortcomings, but it does seem fair for memebers to comment on the lack of bus bar covers, the spacing and support for the (very) heavy batteries, especially where this seems to be at odds with the installation manual. At least it brings some attention to these issues for anyone following along
Click to expand...
(y)... especially as the associated text which says "I hope to be selling a ton of these systems" implies that this installation has been constructed by a SS reseller or installer, rather than just some wealthy DIYer :unsure:
 
OffGridForGood said:
Ah, I see, so while there is good sun, this system can output 36kW, and then after sun-down reduced to 24kW - is this right?
Click to expand...
Take the system for my house. 58 Kwh of battery storage and we can get thru 5 days of poor sun yield before switching to backup power.

Nothing to do with output, that is just a side benefit of a larger bank, less voltage sag and lower C discharge rate.

I'm adding another 14 Kwh for the house. It might make the house completely off grid.
 
Zwy said:
Take the system for my house. 58 Kwh of battery storage and we can get thru 5 days of poor sun yield before switching to backup power.

Nothing to do with output, that is just a side benefit of a larger bank, less voltage sag and lower C discharge rate.

I'm adding another 14 Kwh for the house. It might make the house completely off grid.
Click to expand...
Very nice!
My own loads let me either run 2.5 days 'full bore' ie no cutting back, or four days with reduced loads.
I set up a small tablet just for monitoring the SOC and incoming solar - 50% SOC and sunny is Green-Light for things like laundry.
But the whole going solar thing has lead to adding more loads, this year an expansion to the Greenhouse - which will mean more power required for fans, lights, watering...love it.
 
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