EliteSolar
New Member
- Joined
- Sep 22, 2020
- Messages
- 90
Hi All,
I have a 3.6kw AIO inverter . The model is EASUN SMG II 3.6KW. This model doesn't have a setting to backfeed to the grid.
The unit is possible to run just on PV ( no batteries, no AC IN ) and directly output AC 240V. ( tested )
It can also blend/mix power with the grid ( through AC IN ) ( tested with and without batteries ). That means that if my PVs are producing 1kw and my Air Condition Unit needs 1.5kw , it will draw 0.5kw from the grid.
Many people were wondering what is the maximum power draw on AC OUT in bypass mode and some report that it can output up to 40A in that mode, its only 3.6kw output through the inverter ( panels + batteries ) . I found a post about a similar clone AIO ( MPP ) that explains how ti blends/mixes the PV output with grid , so most probably my unit is similar :
---------------------
"1. when the AC bypass mode is enabled, the AC input and AC outputs lines are bridged together via relay switches
2. the inverter feeds the energy created from the solar panels on to the bridged AC input/output lines by raising the AC voltage via internal semiconductor power switches (IGBTs), in the same way that a normal grid-tied feed-in tariff inverter does. The only difference is that this inverter can never feed energy back into the grid. This must be limited in the software, even though in hardware it is possible to do.
3. this means that when the AC bypass mode is enabled you can go beyond 5KW load - I have successfully gone to over 8KW for several minutes without shutting down - just got the over load beeping.. The maximum power limit would be set by the inverter's internal 40A circuit beaker (about 40A x 250V = 10KW) or what ever circuit breaker you may use on the external AC input line."
-----------------------------
So how can I be sure my AIO never backfeeds to the grid ? It's illegal to do so.
Is there any reliable way to test for this ? Someone suggested a watts meter , it will show negative watts , but is this a reliable way to test for 5mV for example ? Or for a millisecond ?
Thank you !
I have a 3.6kw AIO inverter . The model is EASUN SMG II 3.6KW. This model doesn't have a setting to backfeed to the grid.
The unit is possible to run just on PV ( no batteries, no AC IN ) and directly output AC 240V. ( tested )
It can also blend/mix power with the grid ( through AC IN ) ( tested with and without batteries ). That means that if my PVs are producing 1kw and my Air Condition Unit needs 1.5kw , it will draw 0.5kw from the grid.
Many people were wondering what is the maximum power draw on AC OUT in bypass mode and some report that it can output up to 40A in that mode, its only 3.6kw output through the inverter ( panels + batteries ) . I found a post about a similar clone AIO ( MPP ) that explains how ti blends/mixes the PV output with grid , so most probably my unit is similar :
---------------------
"1. when the AC bypass mode is enabled, the AC input and AC outputs lines are bridged together via relay switches
2. the inverter feeds the energy created from the solar panels on to the bridged AC input/output lines by raising the AC voltage via internal semiconductor power switches (IGBTs), in the same way that a normal grid-tied feed-in tariff inverter does. The only difference is that this inverter can never feed energy back into the grid. This must be limited in the software, even though in hardware it is possible to do.
3. this means that when the AC bypass mode is enabled you can go beyond 5KW load - I have successfully gone to over 8KW for several minutes without shutting down - just got the over load beeping.. The maximum power limit would be set by the inverter's internal 40A circuit beaker (about 40A x 250V = 10KW) or what ever circuit breaker you may use on the external AC input line."
-----------------------------
So how can I be sure my AIO never backfeeds to the grid ? It's illegal to do so.
Is there any reliable way to test for this ? Someone suggested a watts meter , it will show negative watts , but is this a reliable way to test for 5mV for example ? Or for a millisecond ?
Thank you !
