REV110619
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | (805) 640-6700 | info@simpliphipower.com |
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not exceed the maximum continuous discharge rate of the PHI battery bank. Refer to the Discharge
Calculation in Section 3 of this Guide:
𝐵
#𝐼𝑛𝑣
≥
𝐼𝑛𝑣
𝑘𝑊
÷ 𝐼𝑛𝑣
𝑒𝑓𝑓
𝐵𝑎𝑡
𝑘𝑊
Discharge Example:
•
Circuits on the essential loads sub-panel amount to a maximum potential power draw of 30 Amps
at 240 VAC, or 7.2 kW
AC
•
Sol-Ark-8K inverter DC-to-AC efficiency is 95.5%
•
PHI 3.8 kWh-51.2V
nom
battery has a maximum continuous discharge rate of 1.92 kW
DC
𝐵
#𝐼𝑛𝑣
≥
7.2
𝑘𝑊
÷ 0.955
𝑒𝑓𝑓
1.92
𝑘𝑊
= 3.9
A properly sized PHI battery bank based on the maximum draw of the essential loads sub-panel
has a minimum of 4 batteries
, even in this Grid-Tied with Battery Backup application. Note also that
during a grid failure, the essential
loads’ maximum energy draw (kWh) is also limited by the battery bank’s
capacity.
Limited to Home
Checking the
Limited power to Home
box in the
Limiter
tab of the Sol-
Ark’s
Grid Setup / Grid Param
menu allows for all loads* (on both the essential loads sub-panel and the main house breaker panel) to
be powered using the connected solar PV and/or batteries. The Sol-Ark prioritizes powering these loads
from solar PV first (if available), then (2) grid, (3) generator, and (4) batteries. To prioritize the batteri
es’
use over the grid or generator during specific set times, also use the
Time of Use Selling
mode.
*While the
Limited to Home
mode
allows
for all loads to be powered using solar PV and/or batteries, the
Sol-Ark prioritizes powering loads on the essential loads sub-panel first, and loads on the main house
breaker panel are offset by solar (and/or batteries, during Time of Use Selling mode times)
as much as
possible
. If the loads’ draw exceeds the available power from the solar PV array and (with
Time of Use
Selling
mode also in play) the batteries have also discharged to their minimum programmed SoC
percentage level, the Sol-Ark will then resort to powering loads using grid power.
CAUTION:
In Limited to Home mode, limiter sensors are required to
ensure that the home’s main
breaker panel circuits are powered without exporting energy to the grid.
Limited to Load
Checking the
Limited power to load
box in the
Limiter
tab of the Sol-
Ark’s
Grid Setup / Grid Param
menu discharges the battery to power the essential loads sub-
panel’s loads. The
Limited to Load
mode
does not allow for any solar or battery energy to power the main house breaker panel and it does not
allow for any solar or battery energy to be exported to the grid.
Figure 23.0
– Limiter Tab in Grid Setup Menu
