Solar Sanity Checksolar, decoded Independent. Nothing you type leaves your browser.

Grant PUD

Washington Utility Interconnection & net metering rules
Net Metering Allowed1
NEM TypeAnnual
Line Taps Allowed0
Load Taps Allowed0

Net metering & export

Net Metering Allowed
1
NEM Type
Annual
TOU Utility
0
Post Solar Billing Method
Net Metering
Net Excess Generation Notes

If you provide Grant PUD more energy than you use for the billing period, you are billed the minimum charge and any excess energy is “banked” for you for future use. Banked amounts can carry forward month to month but not year to year. Per State Law, this banked amount is eliminated March 31 of each year. We do not purchase customers' excess solar generation. 

Rebates Offered
0
Deregulated
0
Allows Standby
0

Interconnection & taps

Approval Req To Install
Yes
Interconnection Level
3
Line Taps Allowed
0
Load Taps Allowed
0
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
0

System size & offset

System Size Restrictions
100
System Size Restriction Type
AC kW
System Size Battery Included
0
System Size Includes Existing Systems
0
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
System Offset Notes

100% offset (not heavily enforced but highly preferred) or 100 kW AC, whichever is less. The utility does NOT purchase excess energy, and any excess energy after March 31 of each year will be eliminated.

Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A

Plans & docs

Equipment Approvals
California Energy Commission
Rate Schedule Link
link
Website
link
Phone
(509) 766-2512

Other details

Restrict Inspection
0
Revision Required
1
Mod Swap Requires Planset
1
Address ID
5402553
Express Planset Eligible
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Grant PUD before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.