Cercocarpus
New Member
- Joined
- Oct 1, 2022
- Messages
- 2
Hi all,
New member, long time off-grid solar installer and electrician. I searched everywhere but could not find this issue addressed anywhere in the forums or elsewhere online. Hoping someone might have some insight. I’ve dealt with Schneider tech support before and, yeah, would rather not go there just yet.
I hooked up a Schneider SW 4048 on my mom’s house today. There’s a 170 foot run from the inverter in our barn to the sub-panel at her cabin and I upsized all the wiring for voltage drop accordingly (#6 on L1, L2, N, and G). Much to my surprise the resting line voltage inside the cabin was a whopping 128.5v. L1 to L2 at the house sub reads 256v and change.
I measured at the inverter and it was basically the same. I turned on some simultaneous loads at the house (probably 10a m/l all together) and things dipped just a hair (read on nearby outlets) to about 128.2. I don’t have any ready way to measure the actual delivered voltage under load on the fridge or fans or any of the loads I tried.
I tried two different reliable Fluke meters to confirm the reading. Not really sure if I am seeing a problem here or worrying over nothing. But I will say that is the highest resting voltage I can ever recall seeing on a new install. Or coming off the grid for the matter. On the other hand, I don’t usually pay that much attention but was just curious how much voltage drop I was dealing with as it was a major issue on the old system, which was from the grid on scary small wires.
Problem? Ignorance on my part? Anything adjustable on the 4048 to tune in better? Just forget about it? Anyone else ever dealt with this? Doesn’t seem like enough to frazzle motors (5% over 122v) but it just bugs me.
Any insight gratefully appreciated.
New member, long time off-grid solar installer and electrician. I searched everywhere but could not find this issue addressed anywhere in the forums or elsewhere online. Hoping someone might have some insight. I’ve dealt with Schneider tech support before and, yeah, would rather not go there just yet.
I hooked up a Schneider SW 4048 on my mom’s house today. There’s a 170 foot run from the inverter in our barn to the sub-panel at her cabin and I upsized all the wiring for voltage drop accordingly (#6 on L1, L2, N, and G). Much to my surprise the resting line voltage inside the cabin was a whopping 128.5v. L1 to L2 at the house sub reads 256v and change.
I measured at the inverter and it was basically the same. I turned on some simultaneous loads at the house (probably 10a m/l all together) and things dipped just a hair (read on nearby outlets) to about 128.2. I don’t have any ready way to measure the actual delivered voltage under load on the fridge or fans or any of the loads I tried.
I tried two different reliable Fluke meters to confirm the reading. Not really sure if I am seeing a problem here or worrying over nothing. But I will say that is the highest resting voltage I can ever recall seeing on a new install. Or coming off the grid for the matter. On the other hand, I don’t usually pay that much attention but was just curious how much voltage drop I was dealing with as it was a major issue on the old system, which was from the grid on scary small wires.
Problem? Ignorance on my part? Anything adjustable on the 4048 to tune in better? Just forget about it? Anyone else ever dealt with this? Doesn’t seem like enough to frazzle motors (5% over 122v) but it just bugs me.
Any insight gratefully appreciated.