Towable Stand-Alone Power Systems
V-Trailâ„¢ Calculator
kW
hrs
days
kWh/m²/d
Auto-fills by location, editable
Load Profile
Affects solar utilisation
% of load
% consumed during daylight
% of load
Auto: 100 − Day Load
$
Set to 0 if already owned/hired
$
$
$/yr
L/hr
Typical for 30 kVA diesel gen. Fully editable.
Total Generator Cost
$29,000
$
$
$
$/yr
kWp
kWh
Backup Mode
How shortfalls are covered
L/hr
30 kVA super-silent diesel. Editable.
kW
30 kVA × 0.8 PF. Editable.
% min
Battery discharge limit (10% = use 90% of battery)
Total V-Trail Cost
$267,935
$/L
$/kWh
Used in Grid-connected mode
%/yr
%
System RTE
Combined: 93.1%
%
DC→AC conversion efficiency
%
Charge/discharge round-trip eff
Year 1 Energy & Cost Breakdown
Annual operating hours-
Annual energy demand-
Day load / Night load-
Raw solar generation-
↳ Serves day load-
↳ Serves night load-
↳ Curtailed (wasted)-
V-Trail backup gen runtime-
Generator start events-
V-Trail backup fuel used-
Standalone gen fuel used (for comparison)-
Standalone gen fuel cost-
V-Trail operating cost (fuel + maint.)-
Annual Savings (Year 1)-
COâ‚‚ Saved Annually
-
tonnes per year
COâ‚‚ Over Period
-
tonnes total
Net Diesel Saved / Year
-
litres per year