CORRIGENDUM No. 2 - Yap State Government

Response:
The CD has to contain all submitted documents from the tenderer.
(e). Clarification Request #5:
It is nothing mentioned about the size of the containers to deliver the goods. Are there any requirements
It is also not clear about the containers whether they are only used for delivering and going back to the
tenderer or if you are going to keep them
Response:
Only 20’ containers can be accepted in Yap harbor. The containers can go back to the tenderer.
(f). Clarification Request #6:
PV Module Mounting Structure
Can you please clarify if we also have to supply the post/poles for the array mounting structure
Response:
No, the modules will be ground-mounted on a concrete structure prepared by YSPSC. It is however
important to include the technical drawings of the proposed mounting structure.
(g). Clarification Request #7:
Charge Controllers
For a SCS the charge controller is specified to be 70A at 48V. Our question is can we offer a lesser amps
controller than 70A if our array voltage will be configured at higher voltage to charge the 48V battery bank
via MPPT technology.
Response:
You can offer an alternative design that we can look into however the official proposal needs to comply
with the requested specs. Note that the specifications ask for a 48 V system and 3,360 Wp. It is however,
possible to parallel 2 or 3 charge controllers, if this is recommended by the manufacturer. Please refer to
point e.8 of Annex II.
(h). Clarification Request #8:
Wires, connectors and fuses
Could please specify the cable run between the PV Module to Charge controller and the cable run
between charge controller and battery for the SCS
Response:
The tender documents ask the tenderer under point g.2 to specify the wire sizes for the SCS with the note
that “All wiring must be sized to keep line voltage losses to less than two percent (2%) in each sub-circuit
and to allow the circuit to operate at a maximum of 60deg Celsius within the ampacity rating of the cable.”
Voltage drop calculations need to be included in the proposal.
(i). Clarification Request #9:
Will 12V batteries be considered as well (e.g. 12V 190Ah for SHS)
Response:
No, the specs need to comply with the technical tender document. We have left a window open to send
besides the offer that follows the set specification to propose and alternative design. For now only 6V and
2V batteries will be accepted.
(j). Clarification Request #10:
Typically larger charge controllers (45A and above), function only as a charge controller or a load