daklein
New Member
- Joined
- May 8, 2020
- Messages
- 190
I would use one of these style switches: https://www.amazon.com/gp/product/B07RSWY129
Has anyone powered a heat pump via an automatic transfer switch? The ATS is a fast switching ~50ms type, so less than 3 cycles. It should be fine to switch even when the HP is running, but most likely the HP is not usually running when it would switch. Has any seen issues with a whole house ATS and inverter heat pumps, or other similar equipment loads?
The HP is a Gree Flexx / MrCool Universal which has an inverter fan and inverter rotary compressor. There is a good surge suppressor installed at the outdoor unit.
The house is connected to the grid, but operates primarily from an off-grid battery & solar system, with 2x SMA SI6048US inverters. In the winter, there is excess banked electricity to use from the grid for heating, but only to be used during off-peak times. On-peak times (weekdays 11a-7p) the heat pump can use excess off-grid solar to heat up 170 gal of hydronic buffer tank water, or not run at all if there's some heat left in the buffer tanks. Generally, the house doesn't need heat during the day, with primary heat from a wood stove. There is a timer that prevents using the heat pump or resistance backup during on-peak. Summer A/C use is from off-grid, since there's usually plenty of sun if it's hot out.
Pictures of the system, https://photos.google.com/share/AF1...?key=SGEzZnJwZS1hclRWVFZJU25kN3NLTUppV1ZhMFRB a little complicated.... split ASHP to conventional indoor AH w/ new r410 coil and ECM blower for A/C and supplemental heat maybe, with primary heating to hydronic.
Thanks!
Has anyone powered a heat pump via an automatic transfer switch? The ATS is a fast switching ~50ms type, so less than 3 cycles. It should be fine to switch even when the HP is running, but most likely the HP is not usually running when it would switch. Has any seen issues with a whole house ATS and inverter heat pumps, or other similar equipment loads?
The HP is a Gree Flexx / MrCool Universal which has an inverter fan and inverter rotary compressor. There is a good surge suppressor installed at the outdoor unit.
The house is connected to the grid, but operates primarily from an off-grid battery & solar system, with 2x SMA SI6048US inverters. In the winter, there is excess banked electricity to use from the grid for heating, but only to be used during off-peak times. On-peak times (weekdays 11a-7p) the heat pump can use excess off-grid solar to heat up 170 gal of hydronic buffer tank water, or not run at all if there's some heat left in the buffer tanks. Generally, the house doesn't need heat during the day, with primary heat from a wood stove. There is a timer that prevents using the heat pump or resistance backup during on-peak. Summer A/C use is from off-grid, since there's usually plenty of sun if it's hot out.
Pictures of the system, https://photos.google.com/share/AF1...?key=SGEzZnJwZS1hclRWVFZJU25kN3NLTUppV1ZhMFRB a little complicated.... split ASHP to conventional indoor AH w/ new r410 coil and ECM blower for A/C and supplemental heat maybe, with primary heating to hydronic.
Thanks!