JP@REAP
New Member
Hello, first of many posts I'm sure! On our site we have 3 off grid installs but right now my question is concerning the standalone system that runs our .5mi campus fully covered WiFi infrastructure. This is the setup:
x3 240w, 40v Panels
x1 Victron Phoenix Interver 500
x1 Victron Smart Solar MPPT 100/70
x4 12.8v 100ah Batteries
x1 Victron Smart Shunt 500a
x1 Victron Cerbo GX
That is all to support a Ubiquiti Dream Router, 4 POE adapters and a single Google Home camera, without getting lost in the details, the average load peaks at around 70, averaging 60-70 watts all day 24/7. Calculating on the high end that that is around 1,680 watts per 24 hr time span. If my battery is 4800wh available and lets say discharge floor is 20%, that leaves me with 3,840wh to work with and therefore 2.28 days of backup power. (we are shooting for 4, recommendations on how to size up to meet that appreciated)
So, I'm trying to understand a couple things:
Does the data on this graph make sense given some of this background info?
Why is it that "time to go" and SOC can be so completely different at the same voltage if that is one of the ways in which that is determined? (the example shows that at 13.10v at one point TTG is 59.32h, SOC 85.2%, another TTG is 202 hrs, SOC 78%
What might I have set wrong that is causing such incongruencies? I swear, it has been about a month since we installed the Cerbo and I just cannot get my head around what it is telling me half the time...
Thanks a bunch, I sort of stumbled into running the off grid power for our org and it has been a lot to take on. Now that we have the ability to see whats going on, the next journey is making sense of it and making sure everything is set right in the system to be as efficient and accurate as possible.
As I stated, we want to reach 4 days of backup but could use suggestions on how as our 4 parallel batt bank suggests no more batteries can be added in parallel.
x3 240w, 40v Panels
x1 Victron Phoenix Interver 500
x1 Victron Smart Solar MPPT 100/70
x4 12.8v 100ah Batteries
x1 Victron Smart Shunt 500a
x1 Victron Cerbo GX
That is all to support a Ubiquiti Dream Router, 4 POE adapters and a single Google Home camera, without getting lost in the details, the average load peaks at around 70, averaging 60-70 watts all day 24/7. Calculating on the high end that that is around 1,680 watts per 24 hr time span. If my battery is 4800wh available and lets say discharge floor is 20%, that leaves me with 3,840wh to work with and therefore 2.28 days of backup power. (we are shooting for 4, recommendations on how to size up to meet that appreciated)
So, I'm trying to understand a couple things:
Does the data on this graph make sense given some of this background info?
Why is it that "time to go" and SOC can be so completely different at the same voltage if that is one of the ways in which that is determined? (the example shows that at 13.10v at one point TTG is 59.32h, SOC 85.2%, another TTG is 202 hrs, SOC 78%
What might I have set wrong that is causing such incongruencies? I swear, it has been about a month since we installed the Cerbo and I just cannot get my head around what it is telling me half the time...
Thanks a bunch, I sort of stumbled into running the off grid power for our org and it has been a lot to take on. Now that we have the ability to see whats going on, the next journey is making sense of it and making sure everything is set right in the system to be as efficient and accurate as possible.
As I stated, we want to reach 4 days of backup but could use suggestions on how as our 4 parallel batt bank suggests no more batteries can be added in parallel.
