I was trying to get some solid data on the performance of my solar array, but we were interrupted by Hurricane Debbie. Still, negative data is still data.
- When it’s a typical Florida sunny day with sunshine until the arrival of our typical afternoon thunderstorms, my 10 kWDC array generates about 58 kwhAC per day.
- Two days before Debbie arrived, it was getting quite cloudy. We only generated 32 kwh.
- As the rains began to arrive on Sunday, our output dropped to 18 kwh.
- It rained all day on Monday, and we only generated 17 kwh. Still, generating that much power while simultaneously getting more than 3 inches of rain is a feat.
It’s sunny today, so we are back to full power. I want a week of solid, typical weather before I lay it all out.
We lost power once for about 15 minutes, in addition to a handful of blips, where the power was out for less than a second. The Powerwalls transferred us to battery power in about 1 or 2 seconds. Just long enough that we had to reset the clocks.
More data to come.
5 Comments
Steve · August 6, 2024 at 8:03 am
Same problem with my system. I got a UPS – uninterrupted power supply for the router.
Divemedic · August 6, 2024 at 9:21 am
My server and networking equipment are all on a UPS.
SiG · August 6, 2024 at 10:41 am
Sounds like a well-designed, conservatively rated system. It’s one thing to deliver 17kWH on a bright sunny day, quite another to do it with heavy enough overcast to be physically raining.
D · August 6, 2024 at 12:58 pm
Yeah…that’s an annoying problem. I have that with my inverter too–the transfer time is ~20 msec. It’s enough to screw up most devices that aren’t connected to a UPS.
It’s also enough to cause our ice machine (that has a compressor motor) to get out of sync and cause it to literally “jump” a few centimeters across the table.
I have an off-grid inverter, so I expect that from something that isn’t synced to the grid…but I would expect more from a grid-tied inverter.
lynn · August 7, 2024 at 5:50 pm
I just found out that one of my neighbors has a custom built solar power panels of 19 kW with two custom built battery panels capable of running everything in his 6,000 ft2 house with 4 generations of Indians for two days without grid power. He paid $120,000 for the system. His typical monthly electric bill is $30.
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