I went a more expensive route but never regretted it as I want a stable
power supply for my SunFrost and 12V DC Pumps. I have an Iota AC to 12v DC
charger/power supply which works with or without batteries. I have kept a
12V battery attached as it gives me 2nd level redundancy when my main bank
h
Ray,
The pumps you recommend seem like very solid units. Have you had
problems with the El Sid pumps?
My concerns are that the TACO and Grundfos pumps I've found are over
80 W each, running on AC. If the El Sid are reliable, I'd prefer to
stay with the low power usage and DC. Do either of th
As many other folks have noted, the El Cid pumps are very low flow rate,
so it can be very hard to get air out of the system. These air pockets
can build up and keep the fluid from flowing at all in some loops. No
flow, no heat. Besides being half the power draw , the ECM pumps are
variable s
Wrenches,
We have a PV array situated about 900' from the POI (240V 1PH). We
initially spec'd (5) 11.4kW inverters and the combined output would be
238A. The wire size required for this current over that distance is cost
prohibitive.
A solution was to use a single 50kW 3 phase inverter at the ar
Another option would be to locate the inverters near the grid and run
the DC at as high a voltage as possible. Have a separate run of wire
for each of the 5 inverters. If you ran the DC at 500 V, an 11.4 kW
inverter would only draw 22.8. A. Use 2/0 AL for a little over 1% VD
at full power.
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Also using Drakes solution, you bypass the issue with the inverter “voltage
drop” causing it to go out of spec in high production times (a 5% voltage drop
would really mean that the inverter would see the grid as being 5% higher than
it really is when producing at full power, potentially causing
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