[RE-wrenches] TIGO/ Classic 250 fights?

2014-07-04 Thread dan
Anyone else having problems with Midnight Classics Flaming out (Literally)? We know they don't play nice with Tigo Optimizers. Wondering if a Midnight SPD might also look like a short to a classic when it clamps. only affected two of the four controllers. Two seemed to be un affected, one tripped o

Re: [RE-wrenches] Sunny Island retrofit

2014-07-04 Thread b...@midnitesolar.com
The Sunny Island has circuitry to protect itself over 56 amps. I think it shuts off. The 60 amp circuit breaker is there to protect the wiring. Customers complain when they cannot get the full 56 amps from the system and 50 amps is the next nominal current breaker below 60 A. Thanks, boB

Re: [RE-wrenches] TIGO/ Classic 250 fights?

2014-07-04 Thread b...@midnitesolar.com
The SPD will (or, should), "clamp" the input voltages, both positive and negative to ground at the MOV voltage rating during a lightning strike. The SPD 300 starts at about 500 volts on each leg of the SPD. The 600 SPD is higher voltage of course. Since, on the PV input side, the MOVs appea

Re: [RE-wrenches] Sunny Island retrofit

2014-07-04 Thread Brian Teitelbaum
Thanks for the clarification boB. I would still however like to get confirmation from that the Sunny Island does indeed protect itself from AC current over 56A. It says nothing to this effect in the literature (at least that I can find), and would seem to contradict the “Higher input currents mu

Re: [RE-wrenches] TIGO/ Classic 250 fights?

2014-07-04 Thread b...@midnitesolar.com
In addition, an SPD is supposed to keep any input lines to the equipment from breaking over the insulation. For the Classic, the hipot voltage is over 2000 volts to chassis (gnd). If the SPDs are grounded and connected well they should be able to do their job unless maybe it is a direct s

Re: [RE-wrenches] Sunny Island retrofit

2014-07-04 Thread b...@midnitesolar.com
I'll let Robin weigh in here as well... Brian, It used to be very clear on the older 5048 Sunny Island. They wanted a 70 amp breaker connected to the input. They were assuming a thermal breaker. 70 times .8 = 56. We use hydraulic/magnetic breakers. They only go up to 60 amps and can be ran at