SA-15K Install Guide and Owner Manual

August 19
th
, 2022 22
Integrating a Generator
Generator < 19.2kW (GEN Terminal, See Pg. 8 - 9)
A. ONLY supports 240V generators | 100A Terminal Block
B. Connect the generator output to the "GEN" input terminal block in the
Sol-Ark 15K user area. GEN input doesn’t support 3-Phase Generators.
C. THD of less than 15% is preferred but not required
Standby Generators > 19.2kW (GRID Terminal, See
Pg. 8 and 11) (OFF-GRID)
A. Supports 220V / 240V / 208V generators | Depends on “Grid Type”
selection | 200A Terminal Block
B. Off-Grid / Whole-home Generator on ATS installations requires
selecting "GEN Connected to Grid Input"
Home Screen → Gear Icon → Grid Setup → Sell Control → GEN
Connected to Grid Input
C. Off-Grid = turn "Grid Sell" off | Only need CTs (on Gen lines) if using
Grid Peak Shaving (see below)
Grid Peak Shaving Mode (For Gen Connected to Grid Breaker)
A. It prevents the Sol-Ark from overloading generators
B. Must place the CT sensors so that they measure L1 and L2 of the
generator's output, pointing arrows on the CTs towards the generator
C. Sol-Ark contributes power above the "Power" value threshold to prevent
overloading the generator
D. This mode will auto-adjust the Grid Charge Amperage to avoid overloads
Gen Start V or % (Grid Start if Gen on Grid Breaker)
Value batts need to reach BEFORE automatically starting a generator connected to the GEN breaker to charge the
battery bank.
Sol-Ark will NOT charge batteries from a generator until the batteries
reach this value.
Gen Start A (Grid Start if Gen on Grid Breaker)
This is how many amps (DC) you can push specifically from the generator to
charge the batts. To ensure you do not overload a small Generator, you will want
to adjust the GEN or GRID Start A value. Multiply value by # of Sol-Arks for actual
current value into batteries.
Increase Gen/Sol-Ark Efficiency
1. Select “Limited to Load” 2. Select “General Standard”
3. Increase Grid frequency range: 55-65H
Suppose PV production = 0W | Disabled TOU | Enabled Grid/Gen Charge: the batteries will be
charged to "full" using the Grid or a Generator (if available) until the battery bank accepts only
5% of its rated capacity in Amperes. This value correlates to roughly 90-93% full for most
batteries and is the generator's default "OFF" signal. If producing PV, the system will use PV to
charge the batteries to 100% full instead.
Weekly Gen Exercise
If the Sol-Ark is up to date with MCU
version xx73 or newer, and your
generator has two-wire start
compatibility, you will experience
weekly generator tests.
These tests occur at 8AM (local time)
every Monday by default.
The test takes approximately 20
minutes to complete. During that
time, the generator will auto-start
and auto-stop.
The generator will not provide
power during this test. The
generator may charge the batteries
if the batteries reach designated
generator start point, however.