Backfeed Breaker Solar

The problem is the backfeeding only happens when battery is fully charged.

Backfeed breaker solar. 690 10 e plug in type back fed circuit breakers connected to a stand alone inverter output in either stand alone or utility interactive systems shall be secured in accordance with 408 36 d. So you always want to be sure your sizing your wire to handle the output of each circuit in the system. Energizing wiring systems far from your setup like this can damage your equipment and the appliances being powered as well as potential for electrocution to technicians repairing power lines. Article 690 requirements apply to solar pv systems.

The nec allows adding a back feed breaker so that the current supply is up to 120 of the rating of the bus bar. The sizing of back feed breakers is another point of difficulty. Nec705 12 b 2 3 b states that where there are two power sources the grid and the solar inverter the sum of their breakers cannot equal more than 120 of the busbar rating of the breaker box. The backfeed generator breaker can t be closed while there is main power on the panel and when there is a power failure it can only be closed after the main breaker is open.

As noted in sec. The main purpose of the fuses and breakers are to protect the wiring. In my case i have 1 6kw solar but 9 6kwh golf battery system it will never get fully charged unless i choose so. We sometimes see people adding a 60 or 80 a breaker instead.

Circuit requirements are outlined in part ii of this article. From there you d land your inverter s output into a 50a breaker and your done. When setting up a generator to backfeed your house power can be pushed out through the main breaker to the transformer and cause unexpected high voltage. According to the manual backfeeding is a real grid tie system once the grid is off the backfeeding stops.